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construct/ircd/db_database.cc

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// The Construct
//
// Copyright (C) The Construct Developers, Authors & Contributors
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#include "db.h"
/// Conf item determines the recovery mode to use when opening any database.
///
/// "absolute" - The default and is the same for an empty value. This means
/// any database corruptions are treated as an error on open and an exception
/// is thrown with nothing else done.
///
/// "point" - The database is rolled back to before any corruption. This will
/// lose some of the latest data last committed, but will open the database
/// and continue normally thereafter.
///
/// "skip" - The corrupted areas are skipped over and the database continues
/// normally with just those assets missing. This option is dangerous because
/// the database continues in a logically incoherent state which is only ok
/// for very specific applications.
///
/// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
///
/// IRCd's applications are NOT tolerant of skip recovery. You will create an
/// incoherent database. NEVER USE "skip" RECOVERY MODE.
///
/// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
///
decltype(ircd::db::open_recover)
ircd::db::open_recover
{
{ "name", "ircd.db.open.recover" },
{ "default", "absolute" },
{ "persist", false },
};
/// Conf item determines if database repair should occur (before open). This
/// mechanism can be used when SST file corruption occurs which is too deep
/// for log-based recovery. The affected blocks may be discarded; this risks
/// destabilizing an application expecting the data in those blocks to exist.
///
/// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
///
/// Use with caution.
///
/// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
///
decltype(ircd::db::open_repair)
ircd::db::open_repair
{
{ "name", "ircd.db.open.repair" },
{ "default", false },
{ "persist", false },
};
/// Conf item toggles whether automatic compaction is enabled or disabled for
/// all databases upon opening. This is useful for developers, debugging and
/// valgrind etc to prevent these background jobs from spawning when unwanted.
decltype(ircd::db::auto_compact)
ircd::db::auto_compact
{
{ "name", "ircd.db.compact.auto" },
{ "default", true },
{ "persist", false },
};
/// Conf item toggles whether rocksdb is allowed to perform file deletion and
/// garbage collection operations as normal. This can be prevented for
/// diagnostic and safemode purposes.
decltype(ircd::db::auto_deletion)
ircd::db::auto_deletion
{
{ "name", "ircd.db.deletion.auto" },
{ "default", true },
{ "persist", false },
};
/// Conf item dictates whether databases will be opened in slave mode; this
/// is a recent feature of RocksDB which may not be available. It allows two
/// instances of a database, so long as only one is not opened as a slave.
decltype(ircd::db::open_slave)
ircd::db::open_slave
{
{ "name", "ircd.db.open.slave" },
{ "default", false },
{ "persist", false },
};
void
ircd::db::sync(database &d)
{
log::debug
{
log, "[%s] @%lu SYNC WAL",
name(d),
sequence(d)
};
throw_on_error
{
d.d->SyncWAL()
};
}
/// Flushes all columns. Note that if blocking=true, blocking may occur for
/// each column individually.
void
ircd::db::flush(database &d,
const bool &sync)
{
log::debug
{
log, "[%s] @%lu FLUSH WAL",
name(d),
sequence(d)
};
throw_on_error
{
d.d->FlushWAL(sync)
};
}
/// Moves memory structures to SST files for all columns. This doesn't
/// necessarily sort anything that wasn't previously sorted, but it may create
/// new SST files and shouldn't be confused with a typical fflush().
/// Note that if blocking=true, blocking may occur for each column individually.
void
ircd::db::sort(database &d,
const bool &blocking,
const bool &now)
{
for(const auto &c : d.columns)
{
db::column column{*c};
db::sort(column, blocking, now);
}
}
void
ircd::db::compact(database &d,
const compactor &cb)
{
static const std::pair<string_view, string_view> range
{
{}, {}
};
for(const auto &c : d.columns) try
{
db::column column{*c};
compact(column, range, -1, cb);
}
catch(const ctx::interrupted &)
{
throw;
}
catch(const std::exception &e)
{
assert(c);
log::error
{
log, "[%s] compact '%s' :%s",
name(d),
name(*c),
e.what(),
};
}
}
void
ircd::db::compact(database &d,
const std::pair<int, int> &level,
const compactor &cb)
{
for(const auto &c : d.columns) try
{
db::column column{*c};
compact(column, level, cb);
}
catch(const ctx::interrupted &)
{
throw;
}
catch(const std::exception &e)
{
assert(c);
log::error
{
log, "[%s] compact '%s' :%s",
name(d),
name(*c),
e.what(),
};
}
}
void
ircd::db::check(database &d)
{
assert(d.d);
throw_on_error
{
d.d->VerifyChecksum()
};
}
void
ircd::db::check(database &d,
const string_view &file)
{
assert(file);
assert(d.d);
const auto &opts
{
d.d->GetOptions()
};
const rocksdb::EnvOptions env_opts
{
opts
};
const bool absolute
{
fs::is_absolute(file)
};
const string_view parts[]
{
d.path, file
};
const std::string path
{
!absolute?
fs::path_string(parts):
std::string{file}
};
throw_on_error
{
rocksdb::VerifySstFileChecksum(opts, env_opts, path)
};
}
void
ircd::db::resume(database &d)
{
assert(d.d);
const ctx::uninterruptible::nothrow ui;
const std::lock_guard lock
{
d.write_mutex
};
const auto errors
{
db::errors(d)
};
log::debug
{
log, "[%s] Attempting to resume from %zu errors @%lu",
name(d),
errors.size(),
sequence(d)
};
throw_on_error
{
d.d->Resume()
};
d.errors.clear();
log::info
{
log, "[%s] Resumed normal operation at sequence number %lu; cleared %zu errors",
name(d),
sequence(d),
errors.size()
};
}
void
ircd::db::refresh(database &d)
{
assert(d.d);
throw_on_error
{
#ifdef IRCD_DB_HAS_SECONDARY
d.d->TryCatchUpWithPrimary()
#else
rocksdb::Status::NotSupported(slice("Slave mode not supported by this RocksDB"_sv))
#endif
};
log::debug
{
log, "[%s] Caught up with primary database.",
name(d)
};
}
void
ircd::db::bgpause(database &d)
{
assert(d.d);
throw_on_error
{
d.d->PauseBackgroundWork()
};
log::debug
{
log, "[%s] Paused all background work",
name(d)
};
}
void
ircd::db::bgcontinue(database &d)
{
assert(d.d);
log::debug
{
log, "[%s] Continuing background work",
name(d)
};
throw_on_error
{
d.d->ContinueBackgroundWork()
};
}
void
ircd::db::bgcancel(database &d,
const bool &blocking)
{
assert(d.d);
log::debug
{
log, "[%s] Canceling all background work...",
name(d)
};
rocksdb::CancelAllBackgroundWork(d.d.get(), blocking);
if(!blocking)
return;
assert(d.env);
assert(d.env->st);
const ctx::uninterruptible::nothrow ui;
for(auto &pool : d.env->st->pool) if(pool)
{
log::debug
{
log, "[%s] Waiting for tasks:%zu queued:%zu active:%zu in pool '%s'",
name(d),
pool->tasks.size(),
pool->p.pending(),
pool->p.active(),
ctx::name(pool->p),
};
pool->wait();
}
const auto errors
{
property<uint64_t>(d, rocksdb::DB::Properties::kBackgroundErrors)
};
const auto level
{
errors? log::level::ERROR : log::level::DEBUG
};
log::logf
{
log, level,
"[%s] Canceled all background work; errors:%lu",
name(d),
errors
};
}
/// Writes a snapshot of this database to the directory specified. The
/// snapshot consists of hardlinks to the bulk data files of this db, but
/// copies the other stuff that usually gets corrupted. The directory can
/// then be opened as its own database either read-only or read-write.
/// Incremental backups and rollbacks can begin from this interface. Note
/// this may be an expensive blocking operation.
uint64_t
ircd::db::checkpoint(database &d)
{
if(!d.checkpointer)
throw error
{
"Checkpointing is not available for db(%p) '%s",
&d,
name(d)
};
const std::lock_guard lock{d.write_mutex};
const ctx::uninterruptible::nothrow ui;
const auto seqnum
{
sequence(d)
};
const std::string dir
{
db::path(name(d), seqnum)
};
throw_on_error
{
d.checkpointer->CreateCheckpoint(dir, 0)
};
log::debug
{
log, "[%s] Checkpoint at sequence %lu in `%s' complete",
name(d),
seqnum,
dir
};
return seqnum;
}
/// This wraps RocksDB's "File Deletions" which means after RocksDB
/// compresses some file it then destroys the uncompressed version;
/// setting this to false will disable that and retain both versions.
/// This is useful when a direct reference is being manually held by
/// us into the uncompressed version which must remain valid.
void
ircd::db::fdeletions(database &d,
const bool &enable,
const bool &force)
{
if(enable) throw_on_error
{
d.d->EnableFileDeletions(force)
};
else throw_on_error
{
d.d->DisableFileDeletions()
};
}
void
ircd::db::setopt(database &d,
const string_view &key,
const string_view &val)
{
const std::unordered_map<std::string, std::string> options
{
{ std::string{key}, std::string{val} }
};
throw_on_error
{
d.d->SetDBOptions(options)
};
}
/// Set the rdb logging level by translating our ircd::log::level to the
/// RocksDB enum. This translation is a reasonable convenience, as both
/// enums are similar enough.
void
ircd::db::loglevel(database &d,
const ircd::log::level &fac)
{
using ircd::log::level;
rocksdb::InfoLogLevel lev
{
rocksdb::WARN_LEVEL
};
switch(fac)
{
case level::CRITICAL: lev = rocksdb::FATAL_LEVEL; break;
case level::ERROR: lev = rocksdb::ERROR_LEVEL; break;
case level::WARNING:
case level::NOTICE: lev = rocksdb::WARN_LEVEL; break;
case level::INFO: lev = rocksdb::INFO_LEVEL; break;
case level::DERROR:
case level::DWARNING:
case level::DEBUG: lev = rocksdb::DEBUG_LEVEL; break;
case level::_NUM_: assert(0); break;
}
d.logger->SetInfoLogLevel(lev);
}
/// Set the rdb logging level by translating our ircd::log::level to the
/// RocksDB enum. This translation is a reasonable convenience, as both
/// enums are similar enough.
ircd::log::level
ircd::db::loglevel(const database &d)
{
const auto &level
{
d.logger->GetInfoLogLevel()
};
switch(level)
{
default:
case rocksdb::NUM_INFO_LOG_LEVELS:
assert(0);
case rocksdb::HEADER_LEVEL:
case rocksdb::FATAL_LEVEL: return log::level::CRITICAL;
case rocksdb::ERROR_LEVEL: return log::level::ERROR;
case rocksdb::WARN_LEVEL: return log::level::WARNING;
case rocksdb::INFO_LEVEL: return log::level::INFO;
case rocksdb::DEBUG_LEVEL: return log::level::DEBUG;
}
}
ircd::db::options
ircd::db::getopt(const database &d)
{
return options
{
d.d->GetDBOptions()
};
}
size_t
ircd::db::bytes(const database &d)
{
return std::accumulate(begin(d.columns), end(d.columns), size_t(0), []
(auto ret, const auto &colptr)
{
db::column c{*colptr};
return ret += db::bytes(c);
});
}
size_t
ircd::db::file_count(const database &d)
{
return std::accumulate(begin(d.columns), end(d.columns), size_t(0), []
(auto ret, const auto &colptr)
{
db::column c{*colptr};
return ret += db::file_count(c);
});
}
/// Get the list of WAL (Write Ahead Log) files.
std::vector<std::string>
ircd::db::wals(const database &cd)
{
auto &d
{
mutable_cast(cd)
};
std::vector<std::unique_ptr<rocksdb::LogFile>> vec;
throw_on_error
{
d.d->GetSortedWalFiles(vec)
};
std::vector<std::string> ret(vec.size());
std::transform(begin(vec), end(vec), begin(ret), []
(const auto &file)
{
return file->PathName();
});
return ret;
}
/// Get the live file list for db; see overlord documentation.
std::vector<std::string>
ircd::db::files(const database &d)
{
uint64_t ignored;
return files(d, ignored);
}
/// Get the live file list for database relative to the database's directory.
/// One of the files is a manifest file which is over-allocated and its used
/// size is returned in the integer passed to the `msz` argument.
///
/// This list may not be completely up to date. The reliable way to get the
/// most current list is to flush all columns first and ensure no database
/// activity took place between the flushing and this query.
std::vector<std::string>
ircd::db::files(const database &cd,
uint64_t &msz)
{
std::vector<std::string> ret;
auto &d(mutable_cast(cd));
throw_on_error
{
d.d->GetLiveFiles(ret, &msz, false)
};
return ret;
}
const std::vector<std::string> &
ircd::db::errors(const database &d)
{
return d.errors;
}
uint64_t
ircd::db::sequence(const database &cd)
{
database &d(mutable_cast(cd));
return d.d->GetLatestSequenceNumber();
}
rocksdb::Cache *
ircd::db::cache(database &d)
{
return d.row_cache.get();
}
const rocksdb::Cache *
ircd::db::cache(const database &d)
{
return d.row_cache.get();
}
template<>
ircd::db::prop_int
ircd::db::property(const database &cd,
const string_view &name)
{
uint64_t ret(0);
database &d(mutable_cast(cd));
if(!d.d->GetAggregatedIntProperty(slice(name), &ret))
throw not_found
{
"property '%s' for all columns in '%s' not found or not an integer.",
name,
db::name(d)
};
return ret;
}
std::shared_ptr<ircd::db::database::column>
ircd::db::shared_from(database::column &column)
{
return column.shared_from_this();
}
std::shared_ptr<const ircd::db::database::column>
ircd::db::shared_from(const database::column &column)
{
return column.shared_from_this();
}
const std::string &
ircd::db::uuid(const database &d)
{
return d.uuid;
}
const std::string &
ircd::db::name(const database &d)
{
return d.name;
}
//
// database
//
namespace ircd::db
{
extern const description default_description;
}
// Instance list linkage
template<>
decltype(ircd::util::instance_list<ircd::db::database>::allocator)
ircd::util::instance_list<ircd::db::database>::allocator
{};
template<>
decltype(ircd::util::instance_list<ircd::db::database>::list)
ircd::util::instance_list<ircd::db::database>::list
{
allocator
};
decltype(ircd::db::default_description)
ircd::db::default_description
{
/// Requirement of RocksDB going back to LevelDB. This column must
/// always exist in all descriptions and probably should be at idx[0].
{ "default" }
};
ircd::db::database &
ircd::db::database::get(column &column)
{
assert(column.d);
return *column.d;
}
const ircd::db::database &
ircd::db::database::get(const column &column)
{
assert(column.d);
return *column.d;
}
ircd::db::database &
ircd::db::database::get(const string_view &name)
{
const auto pair
{
namepoint(name)
};
return get(pair.first, pair.second);
}
ircd::db::database &
ircd::db::database::get(const string_view &name,
const uint64_t &checkpoint)
{
auto *const &d
{
get(std::nothrow, name, checkpoint)
};
if(likely(d))
return *d;
throw checkpoint == uint64_t(-1)?
std::out_of_range{"No database with that name exists"}:
std::out_of_range{"No database with that name at that checkpoint exists"};
}
ircd::db::database *
ircd::db::database::get(std::nothrow_t,
const string_view &name)
{
const auto pair
{
namepoint(name)
};
return get(std::nothrow, pair.first, pair.second);
}
ircd::db::database *
ircd::db::database::get(std::nothrow_t,
const string_view &name,
const uint64_t &checkpoint)
{
for(auto *const &d : list)
if(name == d->name)
if(checkpoint == uint64_t(-1) || checkpoint == d->checkpoint)
return d;
return nullptr;
}
//
// database::database
//
ircd::db::database::database(const string_view &name,
std::string optstr)
:database
{
name, std::move(optstr), default_description
}
{
}
ircd::db::database::database(const string_view &name,
std::string optstr,
description description)
:database
{
namepoint(name).first, namepoint(name).second, std::move(optstr), std::move(description)
}
{
}
ircd::db::database::database(const string_view &name,
const uint64_t &checkpoint,
std::string optstr,
description description)
try
:name
{
namepoint(name).first
}
,checkpoint
{
// a -1 may have been generated by the db::namepoint() util when the user
// supplied just a name without a checkpoint. In the context of database
// opening/creation -1 just defaults to 0.
checkpoint == uint64_t(-1)? 0 : checkpoint
}
,path
{
db::path(this->name, this->checkpoint)
}
,optstr
{
std::move(optstr)
}
,fsck
{
db::open_repair
}
,slave
{
db::open_slave
}
,read_only
{
slave || ircd::read_only
}
,env
{
std::make_shared<struct env>(this)
}
,stats
{
std::make_shared<struct stats>(this)
}
,logger
{
std::make_shared<struct logger>(this)
}
,events
{
std::make_shared<struct events>(this)
}
,mergeop
{
std::make_shared<struct mergeop>(this)
}
,wal_filter
{
std::make_unique<struct wal_filter>(this)
}
,rate_limiter
{
std::make_unique<struct rate_limiter>(this)
}
,allocator
{
#ifdef IRCD_DB_HAS_ALLOCATOR
std::make_shared<struct allocator>(this, nullptr, database::allocator::cache_arena)
#endif
}
,ssts{rocksdb::NewSstFileManager
(
env.get(), // env
logger, // logger
{}, // trash_dir
0, // rate_bytes_per_sec
true, // delete_existing_trash
nullptr, // Status*
0.05, // max_trash_db_ratio 0.25
64_MiB // bytes_max_delete_chunk
)}
,row_cache
{
std::make_shared<database::cache>
(
this, this->stats, this->allocator, this->name, 16_MiB
)
}
,descriptors
{
std::move(description)
}
,opts{[this]
{
auto opts
{
std::make_unique<rocksdb::DBOptions>(make_dbopts(this->optstr, &this->optstr, &read_only, &fsck))
};
// Setup sundry
opts->create_if_missing = true;
opts->create_missing_column_families = true;
// limit maxfdto prevent too many small files degrading read perf; too low is
// bad for write perf.
opts->max_open_files = !slave?
fs::support::rlimit_nofile():
-1;
// MUST be 0 or std::threads are spawned in rocksdb.
opts->max_file_opening_threads = 0;
opts->max_background_jobs = 16;
opts->max_background_flushes = 8;
opts->max_background_compactions = 4;
opts->max_subcompactions = 1;
// For the write-side of a compaction process: writes will be of approx
// this size. The compaction process is composing a buffer of this size
// between those writes. Too large a buffer will hog the CPU and starve
// other ircd::ctx's. Too small a buffer will be inefficient.
opts->writable_file_max_buffer_size = 2_MiB; //TODO: conf
// For the read-side of the compaction process.
opts->compaction_readahead_size = !opts->use_direct_reads?
2_MiB: //TODO: conf
0;
opts->max_total_wal_size = 96_MiB;
opts->db_write_buffer_size = 96_MiB;
//TODO: range_sync
opts->bytes_per_sync = 0;
opts->wal_bytes_per_sync = 0;
// This prevents the creation of additional SST files and lots of I/O on
// either DB open and close.
opts->avoid_flush_during_recovery = true;
opts->avoid_flush_during_shutdown = false;
opts->allow_concurrent_memtable_write = true;
opts->enable_write_thread_adaptive_yield = false;
opts->enable_pipelined_write = false;
opts->write_thread_max_yield_usec = 0;
opts->write_thread_slow_yield_usec = 0;
// Doesn't appear to be in effect when direct io is used. Not supported by
// all filesystems so disabled for now.
// TODO: use fs::support::test_fallocate() test similar to direct_io_test_file.
opts->allow_fallocate = false;
// Detect if O_DIRECT is possible if db::init left a file in the
// database directory claiming such. User can force no direct io
// with program option at startup (i.e -nodirect).
opts->use_direct_reads = bool(fs::fd::opts::direct_io_enable)?
fs::exists(init::direct_io_test_file_path):
false;
// Use the determined direct io value for writes as well.
//opts->use_direct_io_for_flush_and_compaction = opts->use_direct_reads;
// Default corruption tolerance is zero-tolerance; db fails to open with
// error by default to inform the user. The rest of the options are
// various relaxations for how to proceed.
opts->wal_recovery_mode = rocksdb::WALRecoveryMode::kAbsoluteConsistency;
// When corrupted after crash, the DB is rolled back before the first
// corruption and erases everything after it, giving a consistent
// state up at that point, though losing some recent data.
if(string_view(open_recover) == "point")
opts->wal_recovery_mode = rocksdb::WALRecoveryMode::kPointInTimeRecovery;
// When corrupted after crash and PointInTimeRecovery does not work,
// this will drop more data, but consistently. RocksDB sez the WAL is not
// used at all in this mode.
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR >= 10)
if(string_view(open_recover) == "recover")
opts->best_efforts_recovery = true;
#endif
// Skipping corrupted records will create gaps in the DB timeline where the
// application (like a matrix timeline) cannot tolerate the unexpected gap.
if(string_view(open_recover) == "skip" || string_view(open_recover) == "recover")
opts->wal_recovery_mode = rocksdb::WALRecoveryMode::kSkipAnyCorruptedRecords;
// Tolerating corrupted records is very last-ditch for getting the database to
// open in a catastrophe. We have no use for this option but should use it for
//TODO: emergency salvage-mode.
if(string_view(open_recover) == "tolerate")
opts->wal_recovery_mode = rocksdb::WALRecoveryMode::kTolerateCorruptedTailRecords;
// Setup env
opts->env = env.get();
// Setup WAL filter
opts->wal_filter = this->wal_filter.get();
// Setup Rate Limiter
opts->rate_limiter = this->rate_limiter;
// Setup SST file mgmt
opts->sst_file_manager = this->ssts;
// Setup row cache.
opts->row_cache = this->row_cache;
// Setup logging
logger->SetInfoLogLevel(ircd::debugmode? rocksdb::DEBUG_LEVEL : rocksdb::WARN_LEVEL);
opts->info_log_level = logger->GetInfoLogLevel();
opts->info_log = logger;
opts->keep_log_file_num = 1;
//opts->max_log_file_size = 32_MiB;
// Setup event and statistics callbacks
opts->listeners.emplace_back(this->events);
// Setup histogram collecting
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR >= 1)
//this->stats->set_stats_level(rocksdb::kExceptTimeForMutex);
this->stats->set_stats_level(rocksdb::kAll);
#else
//this->stats->stats_level_ = rocksdb::kExceptTimeForMutex;
this->stats->stats_level_ = rocksdb::kAll;
#endif
opts->stats_dump_period_sec = 0; // Disable noise
opts->statistics = this->stats;
#ifdef RB_DEBUG
opts->dump_malloc_stats = true;
#endif
// Disables the timer to delete unused files; this operation occurs
// instead with our compaction operations so we don't need to complicate.
opts->delete_obsolete_files_period_micros = 0;
// Uses thread_local counters in rocksdb and probably useless for ircd::ctx.
opts->enable_thread_tracking = false;
// Setup performance metric options
//rocksdb::SetPerfLevel(rocksdb::PerfLevel::kDisable);
return opts;
}()}
,column_names{[this]
{
// Existing columns at path. If any are left the descriptor set did not
// describe all of the columns found in the database at path.
const auto required
{
db::column_names(path, *opts)
};
// As we find descriptors for all of the columns on the disk we'll
// remove their names from this set. Anything remaining is undescribed
// and that's a fatal error.
std::set<string_view> existing
{
begin(required), end(required)
};
// The names of the columns extracted from the descriptor set
decltype(this->column_names) ret;
for(auto &descriptor : descriptors)
{
// Deprecated columns which have already been dropped won't appear
// in the existing (required) list. We don't need to construct those.
if(!existing.count(descriptor.name) && descriptor.drop)
continue;
// Construct the column instance and indicate that we have a description
// for it by removing it from existing.
ret.emplace(descriptor.name, std::make_shared<column>(*this, descriptor));
existing.erase(descriptor.name);
}
if(!existing.empty())
throw error
{
"Failed to describe existing column '%s' (and %zd others...)",
*begin(existing),
existing.size() - 1
};
return ret;
}()}
,d{[this]
{
std::vector<rocksdb::ColumnFamilyHandle *> handles; // filled by DB::Open()
std::vector<rocksdb::ColumnFamilyDescriptor> columns(this->column_names.size());
std::transform(begin(this->column_names), end(this->column_names), begin(columns), []
(const auto &pair)
{
const auto &column(*pair.second);
return static_cast<const rocksdb::ColumnFamilyDescriptor &>(column);
});
// NOTE: rocksdb sez RepairDB is broken; can't use now
if(fsck && fs::is_dir(path))
{
log::notice
{
log, "Checking database @ `%s' columns[%zu]", path, columns.size()
};
throw_on_error
{
rocksdb::RepairDB(path, *opts, columns)
};
log::info
{
log, "Database @ `%s' check complete", path
};
}
// If the directory does not exist, though rocksdb will create it, we can
// avoid scaring the user with an error log message if we just do that..
if(opts->create_if_missing && !fs::is_dir(path) && !ircd::write_avoid)
fs::mkdir(path);
// Announce attempt before usual point where exceptions are thrown
log::info
{
log, "Opening database \"%s\" @ `%s' with %zu columns...",
this->name,
path,
columns.size()
};
if(read_only)
log::warning
{
log, "Database \"%s\" @ `%s' will be opened in read-only mode.",
this->name,
path,
};
// Open DB into ptr
rocksdb::DB *ptr;
if(slave)
throw_on_error
{
#ifdef IRCD_DB_HAS_SECONDARY
rocksdb::DB::OpenAsSecondary(*opts, path, "/tmp/slave", columns, &handles, &ptr)
#else
rocksdb::Status::NotSupported(slice("Slave mode not supported by this RocksDB"_sv))
#endif
};
else if(read_only)
throw_on_error
{
rocksdb::DB::OpenForReadOnly(*opts, path, columns, &handles, &ptr)
};
else
throw_on_error
{
rocksdb::DB::Open(*opts, path, columns, &handles, &ptr)
};
std::unique_ptr<rocksdb::DB> ret
{
ptr
};
// Set the handles. We can't throw here so we just log an error.
for(const auto &handle : handles) try
{
this->column_names.at(handle->GetName())->handle.reset(handle);
}
catch(const std::exception &e)
{
log::critical
{
log, "[%s] Error finding described handle '%s' which RocksDB opened :%s",
this->name,
handle->GetName(),
e.what()
};
}
return ret;
}()}
,column_index{[this]
{
size_t size{0};
for(const auto &p : column_names)
{
const auto &column(*p.second);
if(db::id(column) + 1 > size)
size = db::id(column) + 1;
}
// This may have some gaps containing nullptrs where a CFID is unused.
decltype(this->column_index) ret(size);
for(const auto &p : column_names)
{
const auto &colptr(p.second);
ret.at(db::id(*colptr)) = colptr;
}
return ret;
}()}
,columns{[this]
{
// Skip the gaps in the column_index vector to make the columns list
// only contain active column instances.
decltype(this->columns) ret;
for(const auto &ptr : this->column_index)
if(ptr)
ret.emplace_back(ptr);
return ret;
}()}
,uuid{[this]
{
std::string ret;
throw_on_error
{
d->GetDbIdentity(ret)
};
return ret;
}()}
,checkpointer{[this]
{
rocksdb::Checkpoint *checkpointer{nullptr};
throw_on_error
{
rocksdb::Checkpoint::Create(this->d.get(), &checkpointer)
};
return checkpointer;
}()}
{
// Disable file deletions here if ordered by the conf item (generally for
// -safe mode operation). If this can be done via DBOptions rather than
// here it would be better.
if(!db::auto_deletion)
db::fdeletions(*this, false);
// Conduct drops from schema changes. The database must be fully opened
// as if they were not dropped first, then we conduct the drop operation
// here. The drop operation has no effects until the database is next
// closed; the dropped columns will still work during this instance.
for(const auto &colptr : columns)
if(describe(*colptr).drop)
db::drop(*colptr);
// Database integrity check branch.
if(has(string_view(ircd::diagnostic), "checkdb"))
{
log::notice
{
log, "[%s] Verifying database integrity. This may take several minutes...",
this->name
};
check(*this);
}
log::info
{
log, "[%s] Opened database @ `%s' with %zu columns at sequence number %lu.",
this->name,
path,
columns.size(),
d->GetLatestSequenceNumber()
};
}
catch(const error &e)
{
log::error
{
"Error opening db [%s] %s",
name,
e.what()
};
throw;
}
catch(const std::exception &e)
{
log::error
{
"Error opening db [%s] %s",
name,
e.what()
};
throw error
{
"Failed to open db [%s] %s",
name,
e.what()
};
}
ircd::db::database::~database()
noexcept try
{
const ctx::uninterruptible::nothrow ui;
const std::unique_lock lock
{
write_mutex
};
log::info
{
log, "[%s] closing database @ `%s'...",
name,
path
};
if(likely(prefetcher))
{
const size_t canceled
{
prefetcher->cancel(*this)
};
log::debug
{
log, "[%s] canceled %zu queued prefetches; waiting for any pending ...",
name,
canceled,
};
// prefetcher::cancel() only removes requests from its queue, but if
// a prefetch request from this database is in flight that is bad; so
// we wait until the unit has completed its pending requests.
prefetcher->wait_pending();
}
bgcancel(*this, true);
log::debug
{
log, "[%s] closing columns...",
name
};
this->checkpointer.reset(nullptr);
this->column_names.clear();
this->column_index.clear();
this->columns.clear();
log::debug
{
log, "[%s] closed columns; flushing...",
name
};
if(!read_only)
flush(*this);
log::debug
{
log, "[%s] flushed; synchronizing...",
name
};
if(!read_only)
sync(*this);
log::debug
{
log, "[%s] synchronized with hardware.",
name
};
const auto sequence
{
d->GetLatestSequenceNumber()
};
throw_on_error
{
d->Close()
};
env->st.reset(nullptr);
log::info
{
log, "[%s] closed database @ `%s' at sequence number %lu.",
name,
path,
sequence
};
}
catch(const std::exception &e)
{
log::error
{
log, "Error closing database(%p) :%s",
this,
e.what()
};
return;
}
catch(...)
{
log::critical
{
log, "Unknown error closing database(%p)",
this
};
return;
}
void
ircd::db::database::operator()(const delta &delta)
{
operator()(sopts{}, delta);
}
void
ircd::db::database::operator()(const std::initializer_list<delta> &deltas)
{
operator()(sopts{}, deltas);
}
void
ircd::db::database::operator()(const delta *const &begin,
const delta *const &end)
{
operator()(sopts{}, begin, end);
}
void
ircd::db::database::operator()(const sopts &sopts,
const delta &delta)
{
operator()(sopts, &delta, &delta + 1);
}
void
ircd::db::database::operator()(const sopts &sopts,
const std::initializer_list<delta> &deltas)
{
operator()(sopts, std::begin(deltas), std::end(deltas));
}
void
ircd::db::database::operator()(const sopts &sopts,
const delta *const &begin,
const delta *const &end)
{
rocksdb::WriteBatch batch;
std::for_each(begin, end, [this, &batch]
(const delta &delta)
{
const auto &op(std::get<op>(delta));
const auto &col(std::get<1>(delta));
const auto &key(std::get<2>(delta));
const auto &val(std::get<3>(delta));
db::column column(operator[](col));
append(batch, column, db::column::delta
{
op,
key,
val
});
});
commit(*this, batch, sopts);
}
ircd::db::database::column &
ircd::db::database::operator[](const string_view &name)
{
return operator[](cfid(name));
}
ircd::db::database::column &
ircd::db::database::operator[](const uint32_t &id)
try
{
auto &ret(*column_index.at(id));
assert(db::id(ret) == id);
return ret;
}
catch(const std::out_of_range &e)
{
throw not_found
{
"[%s] column id[%u] is not available or specified in schema",
this->name,
id
};
}
const ircd::db::database::column &
ircd::db::database::operator[](const string_view &name)
const
{
return operator[](cfid(name));
}
const ircd::db::database::column &
ircd::db::database::operator[](const uint32_t &id)
const try
{
auto &ret(*column_index.at(id));
assert(db::id(ret) == id);
return ret;
}
catch(const std::out_of_range &e)
{
throw not_found
{
"[%s] column id[%u] is not available or specified in schema",
this->name,
id
};
}
uint32_t
ircd::db::database::cfid(const string_view &name)
const
{
const int32_t id
{
cfid(std::nothrow, name)
};
if(id < 0)
throw not_found
{
"[%s] column '%s' is not available or specified in schema",
this->name,
name
};
return id;
}
int32_t
ircd::db::database::cfid(const std::nothrow_t,
const string_view &name)
const
{
const auto it{column_names.find(name)};
return it != std::end(column_names)?
db::id(*it->second):
-1;
}
///////////////////////////////////////////////////////////////////////////////
//
// database::column
//
void
ircd::db::drop(database::column &c)
{
if(!c.handle)
return;
database &d(c);
log::debug
{
log, "[%s]'%s' @%lu DROPPING COLUMN",
name(d),
name(c),
sequence(d)
};
throw_on_error
{
c.d->d->DropColumnFamily(c.handle.get())
};
log::notice
{
log, "[%s]'%s' @%lu DROPPED COLUMN",
name(d),
name(c),
sequence(d)
};
}
bool
ircd::db::dropped(const database::column &c)
{
return c.descriptor?
c.descriptor->drop:
true;
}
uint32_t
ircd::db::id(const database::column &c)
{
if(!c.handle)
return -1;
return c.handle->GetID();
}
const std::string &
ircd::db::name(const database::column &c)
{
return c.name;
}
const ircd::db::descriptor &
ircd::db::describe(const database::column &c)
{
assert(c.descriptor);
return *c.descriptor;
}
//
// database::column
//
ircd::db::database::column::column(database &d,
db::descriptor &descriptor)
:rocksdb::ColumnFamilyDescriptor
(
descriptor.name, db::options{descriptor.options}
)
,d{&d}
,descriptor{&descriptor}
,key_type{this->descriptor->type.first}
,mapped_type{this->descriptor->type.second}
,cmp{this->d, this->descriptor->cmp}
,prefix{this->d, this->descriptor->prefix}
,cfilter{this, this->descriptor->compactor}
,stall{rocksdb::WriteStallCondition::kNormal}
,stats
{
descriptor.name != "default"s?
std::make_shared<struct database::stats>(this->d, this):
this->d->stats
}
,allocator
{
#ifdef IRCD_DB_HAS_ALLOCATOR
std::make_shared<struct database::allocator>(this->d, this, database::allocator::cache_arena, descriptor.block_size)
#endif
}
,handle
{
nullptr, [&d](rocksdb::ColumnFamilyHandle *const handle)
{
assert(d.d);
if(handle && d.d)
d.d->DestroyColumnFamilyHandle(handle);
}
}
{
// If possible, deduce comparator based on type given in descriptor
if(!this->descriptor->cmp.less)
{
if(key_type == typeid(string_view))
this->cmp.user = cmp_string_view{};
else if(key_type == typeid(int64_t))
this->cmp.user = cmp_int64_t{};
else if(key_type == typeid(uint64_t))
this->cmp.user = cmp_uint64_t{};
else
throw error
{
"column '%s' key type[%s] requires user supplied comparator",
this->name,
key_type.name()
};
}
// Set the key comparator
this->options.comparator = &this->cmp;
// Set the prefix extractor
if(this->prefix.user.get && this->prefix.user.has)
this->options.prefix_extractor = std::shared_ptr<const rocksdb::SliceTransform>
{
&this->prefix, [](const rocksdb::SliceTransform *) {}
};
// Set the insert hint prefix extractor
if(this->options.prefix_extractor)
this->options.memtable_insert_with_hint_prefix_extractor = this->options.prefix_extractor;
// Set the compaction filter
this->options.compaction_filter = &this->cfilter;
//this->options.paranoid_file_checks = true;
// More stats reported by the rocksdb.stats property.
this->options.report_bg_io_stats = true;
// Set filter reductions for this column. This means we expect a key to exist.
this->options.optimize_filters_for_hits = this->descriptor->expect_queries_hit;
static const long write_buffer_size_limit[]
{
256_KiB, 16_MiB
};
// Derive the write buffer size from the block size
this->options.write_buffer_size = std::clamp
(
long(this->descriptor->write_buffer_blocks * this->descriptor->block_size),
write_buffer_size_limit[0],
write_buffer_size_limit[1]
);
this->options.max_write_buffer_number = 12;
this->options.min_write_buffer_number_to_merge = 2;
this->options.max_write_buffer_number_to_maintain = 0;
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR > 5) \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR == 5 && ROCKSDB_PATCH >= 2)
this->options.max_write_buffer_size_to_maintain = 0; //this->options.write_buffer_size * 4;
#endif
this->options.arena_block_size = std::clamp
(
this->options.write_buffer_size / 2L,
ulong(512_KiB),
ulong(4_MiB)
);
// Conf item can be set to disable automatic compactions. For developers
// and debugging; good for valgrind.
this->options.disable_auto_compactions = !bool(db::auto_compact);
// Set the compaction style; we don't override this in the descriptor yet.
//this->options.compaction_style = rocksdb::kCompactionStyleNone;
//this->options.compaction_style = rocksdb::kCompactionStyleLevel;
//this->options.compaction_style = rocksdb::kCompactionStyleUniversal;
this->options.compaction_style =
this->descriptor->compaction_pri.empty() || this->descriptor->compaction_pri == "Universal"?
rocksdb::kCompactionStyleUniversal:
rocksdb::kCompactionStyleLevel;
// Set the compaction priority from string in the descriptor
this->options.compaction_pri =
this->descriptor->compaction_pri == "kByCompensatedSize"?
rocksdb::CompactionPri::kByCompensatedSize:
this->descriptor->compaction_pri == "kMinOverlappingRatio"?
rocksdb::CompactionPri::kMinOverlappingRatio:
this->descriptor->compaction_pri == "kOldestSmallestSeqFirst"?
rocksdb::CompactionPri::kOldestSmallestSeqFirst:
this->descriptor->compaction_pri == "kOldestLargestSeqFirst"?
rocksdb::CompactionPri::kOldestLargestSeqFirst:
rocksdb::CompactionPri::kOldestLargestSeqFirst;
// RocksDB sez:
// stop_writes_trigger >= slowdown_writes_trigger >= file_num_compaction_trigger
this->options.level0_stop_writes_trigger =
this->options.compaction_style == rocksdb::kCompactionStyleUniversal?
(this->options.max_write_buffer_number * 8):
64;
this->options.level0_slowdown_writes_trigger =
this->options.compaction_style == rocksdb::kCompactionStyleUniversal?
(this->options.max_write_buffer_number * 6):
48;
this->options.level0_file_num_compaction_trigger =
this->options.compaction_style == rocksdb::kCompactionStyleUniversal?
(this->options.max_write_buffer_number * 2):
4;
// Universal compaction mode options
auto &universal(this->options.compaction_options_universal);
//universal.stop_style = rocksdb::kCompactionStopStyleSimilarSize;
universal.stop_style = rocksdb::kCompactionStopStyleTotalSize;
universal.allow_trivial_move = false;
universal.compression_size_percent = -1;
universal.max_size_amplification_percent = 6667;
universal.size_ratio = 36;
universal.min_merge_width = 8;
universal.max_merge_width = 4 * universal.min_merge_width;
// Level compaction mode options
this->options.num_levels = 7;
this->options.level_compaction_dynamic_level_bytes = false;
this->options.target_file_size_base = this->descriptor->target_file_size.base;
this->options.target_file_size_multiplier = this->descriptor->target_file_size.multiplier;
this->options.max_bytes_for_level_base = this->descriptor->max_bytes_for_level[0].base;
this->options.max_bytes_for_level_multiplier = this->descriptor->max_bytes_for_level[0].multiplier;
this->options.max_bytes_for_level_multiplier_additional = std::vector<int>(this->options.num_levels, 1);
{
auto &dst(this->options.max_bytes_for_level_multiplier_additional);
const auto &src(this->descriptor->max_bytes_for_level);
const size_t src_size(std::distance(begin(src) + 1, std::end(src)));
assert(src_size >= 1);
const auto end
{
begin(src) + 1 + std::min(dst.size(), src_size)
};
std::transform(begin(src) + 1, end, begin(dst), []
(const auto &mbfl)
{
return mbfl.multiplier;
});
}
//this->options.ttl = -2U;
#ifdef IRCD_DB_HAS_PERIODIC_COMPACTIONS
this->options.periodic_compaction_seconds = this->descriptor->compaction_period.count();
#endif
// Compression
const auto &[_compression_algos, _compression_opts]
{
split(this->descriptor->compression, ' ')
};
this->options.compression = find_supported_compression(_compression_algos);
//this->options.compression = rocksdb::kNoCompression;
// Compression options
this->options.compression_opts.enabled = true;
this->options.compression_opts.max_dict_bytes = 0; // ??
if(this->options.compression == rocksdb::kZSTD)
this->options.compression_opts.level = -3;
// Bottommost compression
this->options.bottommost_compression = this->options.compression;
this->options.bottommost_compression_opts = this->options.compression_opts;
if(this->options.bottommost_compression == rocksdb::kZSTD)
this->options.bottommost_compression_opts.level = 0;
//
// Table options
//
// Block based table index type.
if constexpr(ROCKSDB_MAJOR > 6 || (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR >= 6))
table_opts.format_version = 5; // RocksDB >= 6.6.x compat only; otherwise use 4
else
table_opts.format_version = 4; // RocksDB >= 5.16.x compat only; otherwise use 3.
table_opts.index_type = rocksdb::BlockBasedTableOptions::kTwoLevelIndexSearch;
table_opts.read_amp_bytes_per_bit = 8;
// Delta encoding is always used (option ignored) for table
// format_version >= 4 unless block_align=true.
table_opts.use_delta_encoding = false;
table_opts.block_restart_interval = 8;
table_opts.index_block_restart_interval = 1; // >1 slows down iterations
// Determine whether the index for this column should be compressed.
const bool is_string_index(this->descriptor->type.first == typeid(string_view));
const bool is_compression(this->options.compression != rocksdb::kNoCompression);
table_opts.enable_index_compression = is_compression; //&& is_string_index;
// Setup the block size
table_opts.block_size = this->descriptor->block_size;
table_opts.metadata_block_size = this->descriptor->meta_block_size;
table_opts.block_size_deviation = 50;
// Block alignment doesn't work if compression is enabled for this
// column. If not, we want block alignment for direct IO.
table_opts.block_align =
this->options.compression == rocksdb::kNoCompression ||
this->options.compression == rocksdb::kDisableCompressionOption;
//table_opts.data_block_index_type = rocksdb::BlockBasedTableOptions::kDataBlockBinaryAndHash;
//table_opts.data_block_hash_table_util_ratio = 0.75;
// Specify that index blocks should use the cache. If not, they will be
// pre-read into RAM by rocksdb internally. Because of the above
// TwoLevelIndex + partition_filters configuration on RocksDB v5.15 it's
// better to use pre-read except in the case of a massive database.
table_opts.cache_index_and_filter_blocks = true;
table_opts.cache_index_and_filter_blocks_with_high_priority = true;
table_opts.pin_top_level_index_and_filter = false;
table_opts.pin_l0_filter_and_index_blocks_in_cache = false;
table_opts.partition_filters = true;
// Setup the cache for assets.
const auto &cache_size(this->descriptor->cache_size);
if(cache_size != 0)
table_opts.block_cache = std::make_shared<database::cache>(this->d, this->stats, this->allocator, this->name, cache_size);
// RocksDB will create an 8_MiB block_cache if we don't create our own.
// To honor the user's desire for a zero-size cache, this must be set.
if(!table_opts.block_cache)
{
table_opts.no_block_cache = true;
table_opts.cache_index_and_filter_blocks = false; // MBZ or error w/o block_cache
}
// Setup the cache for compressed assets.
const auto &cache_size_comp(this->descriptor->cache_size_comp);
if(cache_size_comp != 0)
table_opts.block_cache_compressed = std::make_shared<database::cache>(this->d, this->stats, this->allocator, this->name, cache_size_comp);
// Setup the bloom filter.
const auto &bloom_bits(this->descriptor->bloom_bits);
if(bloom_bits)
table_opts.filter_policy.reset(rocksdb::NewBloomFilterPolicy(bloom_bits, false));
// Tickers::READ_AMP_TOTAL_READ_BYTES / Tickers::READ_AMP_ESTIMATE_USEFUL_BYTES
//table_opts.read_amp_bytes_per_bit = 8;
// Finally set the table options in the column options.
this->options.table_factory.reset(rocksdb::NewBlockBasedTableFactory(table_opts));
log::debug
{
log, "schema '%s' column [%s => %s] cmp[%s] pfx[%s] lru:%s:%s bloom:%zu compression:%d %s",
db::name(d),
demangle(key_type.name()),
demangle(mapped_type.name()),
this->cmp.Name(),
this->options.prefix_extractor? this->prefix.Name() : "none",
cache_size? "YES": "NO",
cache_size_comp? "YES": "NO",
bloom_bits,
int(this->options.compression),
this->descriptor->name
};
}
ircd::db::database::column::~column()
noexcept
{
}
ircd::db::database::column::operator
database &()
{
return *d;
}
ircd::db::database::column::operator
rocksdb::ColumnFamilyHandle *()
{
return handle.get();
}
ircd::db::database::column::operator
const database &()
const
{
return *d;
}
ircd::db::database::column::operator
const rocksdb::ColumnFamilyHandle *()
const
{
return handle.get();
}
ircd::db::database::column::operator
const rocksdb::ColumnFamilyOptions &()
const
{
return options;
}
///////////////////////////////////////////////////////////////////////////////
//
// database::comparator
//
ircd::db::database::comparator::comparator(database *const &d,
db::comparator user)
:d{d}
,user
{
std::move(user)
}
{
}
const char *
ircd::db::database::comparator::Name()
const noexcept
{
assert(!user.name.empty());
return user.name.data();
}
bool
ircd::db::database::comparator::Equal(const Slice &a,
const Slice &b)
const noexcept
{
return user.equal?
user.equal(slice(a), slice(b)):
Compare(a, b) == 0;
}
int
ircd::db::database::comparator::Compare(const Slice &a,
const Slice &b)
const noexcept
{
assert(bool(user.less));
const auto sa{slice(a)};
const auto sb{slice(b)};
return user.less(sa, sb)? -1: // less[Y], equal[?], greater[?]
user.equal && user.equal(sa, sb)? 0: // less[N], equal[Y], greater[?]
user.equal? 1: // less[N], equal[N], greater[Y]
user.less(sb, sa)? 1: // less[N], equal[?], greater[Y]
0; // less[N], equal[Y], greater[N]
}
void
ircd::db::database::comparator::FindShortestSeparator(std::string *const key,
const Slice &limit)
const noexcept
{
assert(key != nullptr);
if(user.separator)
user.separator(*key, slice(limit));
}
void
ircd::db::database::comparator::FindShortSuccessor(std::string *const key)
const noexcept
{
assert(key != nullptr);
if(user.successor)
user.successor(*key);
}
bool
ircd::db::database::comparator::IsSameLengthImmediateSuccessor(const Slice &s,
const Slice &t)
const noexcept
{
return rocksdb::Comparator::IsSameLengthImmediateSuccessor(s, t);
}
bool
ircd::db::database::comparator::CanKeysWithDifferentByteContentsBeEqual()
const noexcept
{
// When keys with different byte contents can be equal the keys are
// not hashable.
return !user.hashable;
}
///////////////////////////////////////////////////////////////////////////////
//
// database::prefix_transform
//
const char *
ircd::db::database::prefix_transform::Name()
const noexcept
{
assert(!user.name.empty());
return user.name.c_str();
}
rocksdb::Slice
ircd::db::database::prefix_transform::Transform(const Slice &key)
const noexcept
{
assert(bool(user.get));
return slice(user.get(slice(key)));
}
bool
ircd::db::database::prefix_transform::InRange(const Slice &key)
const noexcept
{
return InDomain(key);
}
bool
ircd::db::database::prefix_transform::InDomain(const Slice &key)
const noexcept
{
assert(bool(user.has));
return user.has(slice(key));
}
///////////////////////////////////////////////////////////////////////////////
//
// database::snapshot
//
uint64_t
ircd::db::sequence(const database::snapshot &s)
{
const rocksdb::Snapshot *const rs(s);
return sequence(rs);
}
uint64_t
ircd::db::sequence(const rocksdb::Snapshot *const &rs)
{
return likely(rs)? rs->GetSequenceNumber() : 0ULL;
}
//
// snapshot::shapshot
//
ircd::db::database::snapshot::snapshot(database &d)
:s
{
!d.slave?
d.d->GetSnapshot():
nullptr,
[dp(weak_from(d))](const rocksdb::Snapshot *const s)
{
if(!s)
return;
const auto d(dp.lock());
d->d->ReleaseSnapshot(s);
}
}
{
}
ircd::db::database::snapshot::~snapshot()
noexcept
{
}
///////////////////////////////////////////////////////////////////////////////
//
// database::logger
//
ircd::db::database::logger::logger(database *const &d)
:rocksdb::Logger{}
,d{d}
{
}
ircd::db::database::logger::~logger()
noexcept
{
}
rocksdb::Status
ircd::db::database::logger::Close()
noexcept
{
return rocksdb::Status::NotSupported();
}
static
ircd::log::level
translate(const rocksdb::InfoLogLevel &level)
{
switch(level)
{
// Treat all infomational messages from rocksdb as debug here for now.
// We can clean them up and make better reports for our users eventually.
default:
case rocksdb::InfoLogLevel::DEBUG_LEVEL: return ircd::log::level::DEBUG;
case rocksdb::InfoLogLevel::INFO_LEVEL: return ircd::log::level::DEBUG;
case rocksdb::InfoLogLevel::WARN_LEVEL: return ircd::log::level::WARNING;
case rocksdb::InfoLogLevel::ERROR_LEVEL: return ircd::log::level::ERROR;
case rocksdb::InfoLogLevel::FATAL_LEVEL: return ircd::log::level::CRITICAL;
case rocksdb::InfoLogLevel::HEADER_LEVEL: return ircd::log::level::NOTICE;
}
}
void
ircd::db::database::logger::Logv(const char *const fmt,
va_list ap)
noexcept
{
Logv(rocksdb::InfoLogLevel::DEBUG_LEVEL, fmt, ap);
}
void
ircd::db::database::logger::LogHeader(const char *const fmt,
va_list ap)
noexcept
{
Logv(rocksdb::InfoLogLevel::DEBUG_LEVEL, fmt, ap);
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wsuggest-attribute=format"
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif __clang__
void
ircd::db::database::logger::Logv(const rocksdb::InfoLogLevel level_,
const char *const fmt,
va_list ap)
noexcept
{
if(level_ < GetInfoLogLevel())
return;
const log::level level
{
translate(level_)
};
if(level > RB_LOG_LEVEL)
return;
thread_local char buf[1024]; const auto len
{
vsnprintf(buf, sizeof(buf), fmt, ap)
};
const auto str
{
// RocksDB adds annoying leading whitespace to attempt to right-justify things and idc
lstrip(string_view{buf, size_t(len)}, ' ')
};
// Skip the options for now
if(startswith(str, "Options"))
return;
rog(level, "[%s] %s", d->name, str);
}
#ifdef __clang__
#pragma clang diagnostic pop
#endif __clang__
#pragma GCC diagnostic pop
///////////////////////////////////////////////////////////////////////////////
//
// database::mergeop
//
ircd::db::database::mergeop::mergeop(database *const &d,
merge_closure merger)
:d{d}
,merger
{
merger?
std::move(merger):
ircd::db::merge_operator
}
{
}
ircd::db::database::mergeop::~mergeop()
noexcept
{
}
const char *
ircd::db::database::mergeop::Name()
const noexcept
{
return "<unnamed>";
}
bool
ircd::db::database::mergeop::Merge(const rocksdb::Slice &_key,
const rocksdb::Slice *const _exist,
const rocksdb::Slice &_update,
std::string *const newval,
rocksdb::Logger *const)
const noexcept try
{
const string_view key
{
_key.data(), _key.size()
};
const string_view exist
{
_exist? string_view { _exist->data(), _exist->size() } : string_view{}
};
const string_view update
{
_update.data(), _update.size()
};
if(exist.empty())
{
*newval = std::string(update);
return true;
}
//XXX caching opportunity?
*newval = merger(key, {exist, update}); // call the user
return true;
}
catch(const std::bad_function_call &e)
{
log::critical
{
log, "merge: missing merge operator (%s)", e
};
return false;
}
catch(const std::exception &e)
{
log::error
{
log, "merge: %s", e
};
return false;
}
///////////////////////////////////////////////////////////////////////////////
//
// database::stats (db/database/stats.h) internal
//
namespace ircd::db
{
static thread_local char database_stats_name_buf[128];
}
//
// stats::stats
//
ircd::db::database::stats::stats(database *const &d,
database::column *const &c)
:d{d}
,c{c}
,get_copied
{
{ "name", make_name("get.copied") },
{ "desc", "Number of DB::Get() results violating zero-copy." },
}
,get_referenced
{
{ "name", make_name("get.referenced") },
{ "desc", "Number of DB::Get() results adhering to zero-copy." },
}
,multiget_copied
{
{ "name", make_name("multiget.copied") },
{ "desc", "Number of DB::MultiGet() results violating zero-copy." },
}
,multiget_referenced
{
{ "name", make_name("multiget.referenced") },
{ "desc", "Number of DB::MultiGet() results adhering to zero-copy." },
}
{
assert(item.size() == ticker.size());
for(size_t i(0); i < item.size(); ++i)
{
const auto &[id, ticker_name]
{
rocksdb::TickersNameMap[i]
};
assert(id == i);
new (item.data() + i) ircd::stats::item<uint64_t *>
{
std::addressof(ticker[i]), json::members
{
{ "name", make_name(ticker_name) },
{ "desc", "RocksDB library statistics counter." },
}
};
}
}
ircd::db::database::stats::~stats()
noexcept
{
}
rocksdb::Status
ircd::db::database::stats::Reset()
noexcept
{
ticker.fill(0);
histogram.fill({0.0});
return rocksdb::Status::OK();
}
bool
ircd::db::database::stats::HistEnabledForType(const uint32_t type)
const noexcept
{
return type < histogram.size();
}
void
ircd::db::database::stats::measureTime(const uint32_t type,
const uint64_t time)
noexcept
{
auto &data(histogram.at(type));
data.time += time;
data.hits++;
data.max = std::max(data.max, double(time));
data.avg = data.time / static_cast<long double>(data.hits);
}
void
ircd::db::database::stats::histogramData(const uint32_t type,
rocksdb::HistogramData *const data)
const noexcept
{
assert(data);
const auto &h
{
histogram.at(type)
};
data->median = h.median;
data->percentile95 = h.pct95;
data->percentile99 = h.pct99;
data->average = h.avg;
data->standard_deviation = h.stddev;
data->max = h.max;
}
void
ircd::db::database::stats::recordTick(const uint32_t type,
const uint64_t count)
noexcept
{
ticker.at(type) += count;
}
void
ircd::db::database::stats::setTickerCount(const uint32_t type,
const uint64_t count)
noexcept
{
ticker.at(type) = count;
}
uint64_t
ircd::db::database::stats::getAndResetTickerCount(const uint32_t type)
noexcept
{
const auto ret(getTickerCount(type));
setTickerCount(type, 0);
return ret;
}
uint64_t
ircd::db::database::stats::getTickerCount(const uint32_t type)
const noexcept
{
return ticker.at(type);
}
ircd::string_view
ircd::db::database::stats::make_name(const string_view &ticker_name)
const
{
assert(this->d);
return fmt::sprintf
{
database_stats_name_buf, "ircd.db.%s.%s.%s",
db::name(*d),
c? db::name(*c): "db"s,
ticker_name,
};
}
//
// database::stats::passthru
//
ircd::db::database::stats::passthru::passthru(rocksdb::Statistics *const &a,
rocksdb::Statistics *const &b)
:pass
{
{ a, b }
}
{
}
ircd::db::database::stats::passthru::~passthru()
noexcept
{
}
rocksdb::Status
__attribute__((noreturn))
ircd::db::database::stats::passthru::Reset()
noexcept
{
ircd::terminate
{
"Unavailable for passthru"
};
__builtin_unreachable();
}
void
ircd::db::database::stats::passthru::recordTick(const uint32_t tickerType,
const uint64_t count)
noexcept
{
for(auto *const &pass : this->pass)
pass->recordTick(tickerType, count);
}
void
ircd::db::database::stats::passthru::measureTime(const uint32_t histogramType,
const uint64_t time)
noexcept
{
for(auto *const &pass : this->pass)
pass->measureTime(histogramType, time);
}
bool
ircd::db::database::stats::passthru::HistEnabledForType(const uint32_t type)
const noexcept
{
return std::all_of(begin(pass), end(pass), [&type]
(const auto *const &pass)
{
return pass->HistEnabledForType(type);
});
}
uint64_t
__attribute__((noreturn))
ircd::db::database::stats::passthru::getTickerCount(const uint32_t tickerType)
const noexcept
{
ircd::terminate
{
"Unavailable for passthru"
};
__builtin_unreachable();
}
void
__attribute__((noreturn))
ircd::db::database::stats::passthru::setTickerCount(const uint32_t tickerType,
const uint64_t count)
noexcept
{
ircd::terminate
{
"Unavailable for passthru"
};
__builtin_unreachable();
}
void
__attribute__((noreturn))
ircd::db::database::stats::passthru::histogramData(const uint32_t type,
rocksdb::HistogramData *const data)
const noexcept
{
ircd::terminate
{
"Unavailable for passthru"
};
__builtin_unreachable();
}
uint64_t
__attribute__((noreturn))
ircd::db::database::stats::passthru::getAndResetTickerCount(const uint32_t tickerType)
noexcept
{
ircd::terminate
{
"Unavailable for passthru"
};
__builtin_unreachable();
}
///////////////////////////////////////////////////////////////////////////////
//
// database::events
//
void
ircd::db::database::events::OnFlushBegin(rocksdb::DB *const db,
const rocksdb::FlushJobInfo &info)
noexcept
{
log::debug
{
log, "[%s] job:%d ctx:%lu flush start '%s' :%s",
d->name,
info.job_id,
info.thread_id,
info.cf_name,
reflect(info.flush_reason),
};
//assert(info.thread_id == ctx::id(*ctx::current));
}
void
ircd::db::database::events::OnFlushCompleted(rocksdb::DB *const db,
const rocksdb::FlushJobInfo &info)
noexcept
{
const auto num_deletions
{
#if ROCKSDB_MAJOR > 5 \
|| (ROCKSDB_MAJOR == 5 && ROCKSDB_MINOR > 18) \
|| (ROCKSDB_MAJOR == 5 && ROCKSDB_MINOR == 18 && ROCKSDB_PATCH >= 3)
info.table_properties.num_deletions
#else
0UL
#endif
};
char pbuf[2][48];
log::info
{
log, "[%s] job:%d ctx:%lu flushed seq[%lu -> %lu] idxs:%lu blks:%lu keys:%lu dels:%lu data[%s] '%s' `%s'",
d->name,
info.job_id,
info.thread_id,
info.smallest_seqno,
info.largest_seqno,
info.table_properties.index_partitions,
info.table_properties.num_data_blocks,
info.table_properties.num_entries,
num_deletions,
pretty(pbuf[1], iec(info.table_properties.data_size)),
info.cf_name,
info.file_path,
};
//assert(info.thread_id == ctx::id(*ctx::current));
}
void
ircd::db::database::events::OnCompactionCompleted(rocksdb::DB *const db,
const rocksdb::CompactionJobInfo &info)
noexcept
{
using rocksdb::CompactionReason;
const log::level level
{
info.status != rocksdb::Status::OK()?
log::level::ERROR:
info.compaction_reason == CompactionReason::kUniversalSizeAmplification?
log::level::WARNING:
info.compaction_reason == CompactionReason::kUniversalSortedRunNum?
log::level::WARNING:
log::level::INFO
};
char prebuf[128];
const string_view prefix
{
fmt::sprintf
{
prebuf, "[%s] job:%d ctx:%lu compact",
d->name,
info.job_id,
info.thread_id,
}
};
log::logf
{
log, level,
"%s lev[%d -> %d] files[%zu -> %zu] %s '%s' (%d): %s",
prefix,
info.base_input_level,
info.output_level,
info.input_files.size(),
info.output_files.size(),
reflect(info.compaction_reason),
info.cf_name,
int(info.status.code()),
info.status.getState()?: "OK",
};
const bool bytes_same
{
info.stats.total_input_bytes == info.stats.total_output_bytes
};
char pbuf[8][48];
size_t i(0);
if(!bytes_same)
log::info
{
log, "%s key[%zu -> %zu (%zu)] %s -> %s | falloc:%s write:%s rsync:%s fsync:%s total:%s",
prefix,
info.stats.num_input_records,
info.stats.num_output_records,
info.stats.num_records_replaced,
pretty(pbuf[i++], iec(info.stats.total_input_bytes)),
bytes_same? "same": pretty(pbuf[i++], iec(info.stats.total_output_bytes)),
pretty(pbuf[i++], nanoseconds(info.stats.file_prepare_write_nanos), true),
pretty(pbuf[i++], nanoseconds(info.stats.file_write_nanos), true),
pretty(pbuf[i++], nanoseconds(info.stats.file_range_sync_nanos), true),
pretty(pbuf[i++], nanoseconds(info.stats.file_fsync_nanos), true),
pretty(pbuf[i++], microseconds(info.stats.elapsed_micros), true),
};
assert(i <= 8);
if(info.stats.num_corrupt_keys > 0)
log::critical
{
log, "[%s] job:%d reported %lu corrupt keys.",
d->name,
info.job_id,
info.stats.num_corrupt_keys
};
assert(info.thread_id == ctx::id(*ctx::current));
}
void
ircd::db::database::events::OnTableFileDeleted(const rocksdb::TableFileDeletionInfo &info)
noexcept
{
const log::level level
{
info.status == rocksdb::Status::OK()?
log::level::DEBUG:
log::level::ERROR
};
log::logf
{
log, level,
"[%s] job:%d table file delete [%s][%s] (%d): %s",
d->name,
info.job_id,
info.db_name,
lstrip(info.file_path, info.db_name),
int(info.status.code()),
info.status.getState()?: "OK",
};
}
void
ircd::db::database::events::OnTableFileCreated(const rocksdb::TableFileCreationInfo &info)
noexcept
{
const log::level level
{
info.status == rocksdb::Status::OK()?
log::level::DEBUG:
log::level::ERROR
};
log::logf
{
log, level,
"[%s] job:%d table file closed [%s][%s] size:%s '%s' (%d): %s",
d->name,
info.job_id,
info.db_name,
lstrip(info.file_path, info.db_name),
pretty(iec(info.file_size)),
info.cf_name,
int(info.status.code()),
info.status.getState()?: "OK",
};
log::debug
{
log, "[%s] job:%d head[%s] index[%s] filter[%s] data[%lu %s] keys[%lu %s] vals[%s] %s",
d->name,
info.job_id,
pretty(iec(info.table_properties.top_level_index_size)),
pretty(iec(info.table_properties.index_size)),
pretty(iec(info.table_properties.filter_size)),
info.table_properties.num_data_blocks,
pretty(iec(info.table_properties.data_size)),
info.table_properties.num_entries,
pretty(iec(info.table_properties.raw_key_size)),
pretty(iec(info.table_properties.raw_value_size)),
info.table_properties.compression_name
};
}
void
ircd::db::database::events::OnTableFileCreationStarted(const rocksdb::TableFileCreationBriefInfo &info)
noexcept
{
log::logf
{
log, log::level::DEBUG,
"[%s] job:%d table file opened [%s][%s] '%s'",
d->name,
info.job_id,
info.db_name,
lstrip(info.file_path, info.db_name),
info.cf_name,
};
}
void
ircd::db::database::events::OnMemTableSealed(const rocksdb::MemTableInfo &info)
noexcept
{
log::logf
{
log, log::level::DEBUG,
"[%s] [%s] memory table sealed [seq >= %lu first:%lu] entries:%lu deletes:%lu",
d->name,
info.cf_name,
info.earliest_seqno,
info.first_seqno,
info.num_entries,
info.num_deletes,
};
}
void
ircd::db::database::events::OnColumnFamilyHandleDeletionStarted(rocksdb::ColumnFamilyHandle *const h)
noexcept
{
log::debug
{
log, "[%s] [%s] handle closing @ %p",
d->name,
h->GetName(),
h
};
}
void
ircd::db::database::events::OnExternalFileIngested(rocksdb::DB *const d,
const rocksdb::ExternalFileIngestionInfo &info)
noexcept
{
log::notice
{
log, "[%s] [%s] external file ingested external[%s] internal[%s] sequence:%lu",
this->d->name,
info.cf_name,
info.external_file_path,
info.internal_file_path,
info.global_seqno
};
}
void
ircd::db::database::events::OnBackgroundError(rocksdb::BackgroundErrorReason reason,
rocksdb::Status *const status)
noexcept
{
assert(d);
assert(status);
thread_local char buf[1024];
const string_view str{fmt::sprintf
{
buf, "%s error in %s :%s",
reflect(status->severity()),
reflect(reason),
status->ToString()
}};
// This is a legitimate when we want to use it. If the error is not
// suppressed the DB will enter read-only mode and will require a
// call to db::resume() to clear the error (i.e by admin at console).
const bool ignore
{
false
};
const log::level lev
{
ignore?
log::level::DERROR:
status->severity() == rocksdb::Status::kFatalError?
log::level::CRITICAL:
status->severity() == rocksdb::Status::kUnrecoverableError?
log::level::CRITICAL:
log::level::ERROR
};
log::logf
{
log, lev, "[%s] %s", d->name, str
};
if(ignore)
{
*status = rocksdb::Status::OK();
return;
}
// Downgrade select fatal errors to hard errors. If this downgrade
// does not occur then it can never be cleared by a db::resume() and
// the daemon must be restarted.
if(reason == rocksdb::BackgroundErrorReason::kCompaction)
if(status->severity() == rocksdb::Status::kFatalError)
*status = rocksdb::Status(*status, rocksdb::Status::kHardError);
// Save the error string to the database instance for later examination.
d->errors.emplace_back(str);
}
void
ircd::db::database::events::OnStallConditionsChanged(const rocksdb::WriteStallInfo &info)
noexcept
{
using rocksdb::WriteStallCondition;
assert(d);
auto &column
{
(*d)[info.cf_name]
};
auto prev
{
info.condition.prev
};
// We seem to be getting these callbacks out of order sometimes. The only
// way to achieve the proper behavior is to always allow transitions to a
// normal state, while ignoring any other incorrect transitions.
const bool changed
{
info.condition.cur != WriteStallCondition::kNormal?
compare_exchange(column.stall, prev, info.condition.cur):
compare_exchange(column.stall, column.stall, info.condition.cur)
};
if(!changed)
return;
const auto level
{
column.stall == WriteStallCondition::kNormal?
log::level::INFO:
log::level::WARNING
};
log::logf
{
log, level,
"[%s] [%s] stall condition %s",
d->name,
info.cf_name,
reflect(column.stall),
};
assert(column.stall == info.condition.cur);
//assert(column.stall != WriteStallCondition::kStopped);
}
///////////////////////////////////////////////////////////////////////////////
//
// database::cache (internal)
//
decltype(ircd::db::database::cache::DEFAULT_SHARD_BITS)
ircd::db::database::cache::DEFAULT_SHARD_BITS
(
std::log2(std::min(size_t(db::request_pool_size), 16UL))
);
decltype(ircd::db::database::cache::DEFAULT_STRICT)
ircd::db::database::cache::DEFAULT_STRICT
{
false
};
decltype(ircd::db::database::cache::DEFAULT_HI_PRIO)
ircd::db::database::cache::DEFAULT_HI_PRIO
{
0.25
};
//
// cache::cache
//
ircd::db::database::cache::cache(database *const &d,
std::shared_ptr<struct database::stats> stats,
std::shared_ptr<struct database::allocator> allocator,
std::string name,
const ssize_t &initial_capacity)
#ifdef IRCD_DB_HAS_ALLOCATOR
:rocksdb::Cache{allocator}
,d{d}
#else
:d{d}
#endif
,name{std::move(name)}
,stats{std::move(stats)}
,allocator{std::move(allocator)}
,c{rocksdb::NewLRUCache(rocksdb::LRUCacheOptions
{
size_t(std::max(initial_capacity, ssize_t(0)))
,DEFAULT_SHARD_BITS
,DEFAULT_STRICT
,DEFAULT_HI_PRIO
#ifdef IRCD_DB_HAS_ALLOCATOR
,this->allocator
#endif
})}
{
assert(bool(c));
#ifdef IRCD_DB_HAS_ALLOCATOR
assert(c->memory_allocator() == this->allocator.get());
#endif
}
ircd::db::database::cache::~cache()
noexcept
{
}
const char *
ircd::db::database::cache::Name()
const noexcept
{
return !empty(name)?
name.c_str():
c->Name();
}
rocksdb::Status
ircd::db::database::cache::Insert(const Slice &key,
void *const value,
size_t charge,
deleter del,
Handle **const handle,
Priority priority)
noexcept
{
assert(bool(c));
assert(bool(stats));
const rocksdb::Status &ret
{
c->Insert(key, value, charge, del, handle, priority)
};
stats->recordTick(rocksdb::Tickers::BLOCK_CACHE_ADD, ret.ok());
stats->recordTick(rocksdb::Tickers::BLOCK_CACHE_ADD_FAILURES, !ret.ok());
stats->recordTick(rocksdb::Tickers::BLOCK_CACHE_DATA_BYTES_INSERT, ret.ok()? charge : 0UL);
return ret;
}
rocksdb::Cache::Handle *
ircd::db::database::cache::Lookup(const Slice &key,
Statistics *const statistics)
noexcept
{
assert(bool(c));
assert(bool(this->stats));
database::stats::passthru passthru
{
this->stats.get(), statistics
};
rocksdb::Statistics *const s
{
statistics?
dynamic_cast<rocksdb::Statistics *>(&passthru):
dynamic_cast<rocksdb::Statistics *>(this->stats.get())
};
auto *const &ret
{
c->Lookup(key, s)
};
// Rocksdb's LRUCache stats are broke. The statistics ptr is null and
// passing it to Lookup() does nothing internally. We have to do this
// here ourselves :/
this->stats->recordTick(rocksdb::Tickers::BLOCK_CACHE_HIT, bool(ret));
this->stats->recordTick(rocksdb::Tickers::BLOCK_CACHE_MISS, !bool(ret));
return ret;
}
bool
ircd::db::database::cache::Ref(Handle *const handle)
noexcept
{
assert(bool(c));
return c->Ref(handle);
}
bool
ircd::db::database::cache::Release(Handle *const handle,
bool force_erase)
noexcept
{
assert(bool(c));
return c->Release(handle, force_erase);
}
void *
ircd::db::database::cache::Value(Handle *const handle)
noexcept
{
assert(bool(c));
return c->Value(handle);
}
void
ircd::db::database::cache::Erase(const Slice &key)
noexcept
{
assert(bool(c));
return c->Erase(key);
}
uint64_t
ircd::db::database::cache::NewId()
noexcept
{
assert(bool(c));
return c->NewId();
}
void
ircd::db::database::cache::SetCapacity(size_t capacity)
noexcept
{
assert(bool(c));
return c->SetCapacity(capacity);
}
void
ircd::db::database::cache::SetStrictCapacityLimit(bool strict_capacity_limit)
noexcept
{
assert(bool(c));
return c->SetStrictCapacityLimit(strict_capacity_limit);
}
bool
ircd::db::database::cache::HasStrictCapacityLimit()
const noexcept
{
assert(bool(c));
return c->HasStrictCapacityLimit();
}
size_t
ircd::db::database::cache::GetCapacity()
const noexcept
{
assert(bool(c));
return c->GetCapacity();
}
size_t
ircd::db::database::cache::GetUsage()
const noexcept
{
assert(bool(c));
return c->GetUsage();
}
size_t
ircd::db::database::cache::GetUsage(Handle *const handle)
const noexcept
{
assert(bool(c));
return c->GetUsage(handle);
}
size_t
ircd::db::database::cache::GetPinnedUsage()
const noexcept
{
assert(bool(c));
return c->GetPinnedUsage();
}
void
ircd::db::database::cache::DisownData()
noexcept
{
assert(bool(c));
return c->DisownData();
}
void
ircd::db::database::cache::ApplyToAllCacheEntries(callback cb,
bool thread_safe)
noexcept
{
assert(bool(c));
return c->ApplyToAllCacheEntries(cb, thread_safe);
}
void
ircd::db::database::cache::EraseUnRefEntries()
noexcept
{
assert(bool(c));
return c->EraseUnRefEntries();
}
std::string
ircd::db::database::cache::GetPrintableOptions()
const noexcept
{
assert(bool(c));
return c->GetPrintableOptions();
}
#ifdef IRCD_DB_HAS_CACHE_GETCHARGE
size_t
ircd::db::database::cache::GetCharge(Handle *const handle)
const noexcept
{
assert(bool(c));
return c->GetCharge(handle);
}
#endif
///////////////////////////////////////////////////////////////////////////////
//
// database::compaction_filter
//
ircd::db::database::compaction_filter::compaction_filter(column *const &c,
db::compactor user)
:c{c}
,d{c->d}
,user{std::move(user)}
{
}
ircd::db::database::compaction_filter::~compaction_filter()
noexcept
{
}
rocksdb::CompactionFilter::Decision
ircd::db::database::compaction_filter::FilterV2(const int level,
const Slice &key,
const ValueType type,
const Slice &oldval,
std::string *const newval,
std::string *const skip)
const noexcept
{
const ctx::uninterruptible::nothrow ui;
#ifdef RB_DEBUG_DB_ENV
const auto typestr
{
type == kValue?
"VALUE"_sv:
type == kMergeOperand?
"MERGE"_sv:
"BLOB"_sv
};
#endif
static const compactor::callback empty;
const db::compactor::callback &callback
{
type == ValueType::kValue && user.value?
user.value:
type == ValueType::kMergeOperand && user.merge?
user.merge:
empty
};
if(!callback)
return Decision::kKeep;
#ifdef RB_DEBUG_DB_ENV
log::debug
{
log, "[%s]'%s': compaction level:%d key:%zu@%p type:%s old:%zu@%p new:%p skip:%p",
d->name,
c->name,
level,
size(key),
data(key),
typestr,
size(oldval),
data(oldval),
(const void *)newval,
(const void *)skip
};
#endif
const compactor::args args
{
level, slice(key), slice(oldval), newval, skip
};
switch(callback(args))
{
default:
case db::op::GET: return Decision::kKeep;
case db::op::SET: return Decision::kChangeValue;
case db::op::DELETE: return Decision::kRemove;
case db::op::DELETE_RANGE: return Decision::kRemoveAndSkipUntil;
}
}
bool
ircd::db::database::compaction_filter::IgnoreSnapshots()
const noexcept
{
// RocksDB >= 6.0.0 sez this must no longer be false.
return true;
}
const char *
ircd::db::database::compaction_filter::Name()
const noexcept
{
assert(c);
return db::name(*c).c_str();
}
///////////////////////////////////////////////////////////////////////////////
//
// database::wal_filter
//
decltype(ircd::db::database::wal_filter::debug)
ircd::db::database::wal_filter::debug
{
{ "name", "ircd.db.wal.debug" },
{ "default", false },
{ "persist", false },
};
ircd::db::database::wal_filter::wal_filter(database *const &d)
:d{d}
{
}
ircd::db::database::wal_filter::~wal_filter()
noexcept
{
}
void
ircd::db::database::wal_filter::ColumnFamilyLogNumberMap(const log_number_map &log_number,
const name_id_map &name_id)
noexcept
{
assert(d);
this->log_number = log_number;
this->name_id = name_id;
log::debug
{
log, "[%s] WAL recovery mapping update :log_number:%zu name_id:%zu",
db::name(*d),
log_number.size(),
name_id.size(),
};
}
rocksdb::WalFilter::WalProcessingOption
ircd::db::database::wal_filter::LogRecordFound(unsigned long long log_nr,
const std::string &name,
const WriteBatch &wb,
WriteBatch *const replace,
bool *const replaced)
noexcept
{
assert(d && replace && replaced);
if(debug)
{
char buf[128];
log::logf
{
log, log::level::DEBUG,
"[%s] WAL recovery record log:%lu:%lu '%s' %s",
db::name(*d),
d->checkpoint,
log_nr,
db::debug(buf, *d, wb),
};
}
*replaced = false;
return WalProcessingOption::kContinueProcessing;
}
rocksdb::WalFilter::WalProcessingOption
ircd::db::database::wal_filter::LogRecord(const WriteBatch &wb,
WriteBatch *const replace,
bool *const replaced)
const noexcept
{
return WalProcessingOption::kContinueProcessing;
}
const char *
ircd::db::database::wal_filter::Name()
const noexcept
{
assert(d);
return db::name(*d).c_str();
}
///////////////////////////////////////////////////////////////////////////////
//
// database::rate_limiter
//
ircd::db::database::rate_limiter::rate_limiter(database *const &d)
:d{d}
{
}
ircd::db::database::rate_limiter::~rate_limiter()
noexcept
{
}
void
ircd::db::database::rate_limiter::SetBytesPerSecond(int64_t bytes_per_second)
noexcept
{
log::debug
{
log, "[%s] Rate Limiter update rate %zu -> %zu bytes per second",
db::name(*d),
this->bytes_per_second,
bytes_per_second,
};
this->bytes_per_second = bytes_per_second;
}
size_t
ircd::db::database::rate_limiter::RequestToken(size_t bytes,
size_t alignment,
IOPriority prio,
Statistics *const stats,
OpType type)
noexcept
{
#ifdef RB_DEBUG_DB_ENV
log::debug
{
log, "[%s] Rate Limiter request bytes:%zu alignment:%zu prio:%s type:%s",
db::name(*d),
bytes,
alignment,
reflect(prio),
type == OpType::kWrite?
"WRITE"_sv:
type == OpType::kRead?
"READ"_sv:
"????"_sv,
};
#endif
assert(prio <= IOPriority::IO_TOTAL);
{
int64_t i(prio == IOPriority::IO_TOTAL? 0: prio); do
{
requests[i].bytes += bytes;
requests[i].count += 1;
}
while(++i < prio);
}
//assert(stats);
//stats->recordTick(rocksdb::Tickers::RATE_LIMIT_DELAY_MILLIS, 0);
//stats->recordTick(rocksdb::Tickers::NUMBER_RATE_LIMITER_DRAINS, 0);
//stats->recordTick(rocksdb::Tickers::HARD_RATE_LIMIT_DELAY_COUNT, 0);
//stats->recordTick(rocksdb::Tickers::SOFT_RATE_LIMIT_DELAY_COUNT, 0);
return bytes;
}
int64_t
ircd::db::database::rate_limiter::GetTotalBytesThrough(const IOPriority prio)
const noexcept
{
int64_t ret(0);
int64_t i(prio == IOPriority::IO_TOTAL? 0: prio); do
{
ret += requests[i].bytes;
}
while(++i < prio);
return ret;
}
int64_t
ircd::db::database::rate_limiter::GetTotalRequests(const IOPriority prio)
const noexcept
{
int64_t ret(0);
int64_t i(prio == IOPriority::IO_TOTAL? 0: prio); do
{
ret += requests[i].count;
}
while(++i < prio);
return ret;
}
int64_t
ircd::db::database::rate_limiter::GetSingleBurstBytes()
const noexcept
{
always_assert(false);
return bytes_per_second;
}
int64_t
ircd::db::database::rate_limiter::GetBytesPerSecond()
const noexcept
{
return bytes_per_second;
}
bool
ircd::db::database::rate_limiter::IsRateLimited(OpType op)
noexcept
{
always_assert(false);
return false;
}
///////////////////////////////////////////////////////////////////////////////
//
// database::sst
//
void
ircd::db::database::sst::tool(const vector_view<const string_view> &args)
{
const ctx::uninterruptible::nothrow ui;
static const size_t arg_max {16};
static const size_t arg_max_len {256};
thread_local char arg[arg_max][arg_max_len]
{
"./sst_dump"
};
size_t i(0);
char *argv[arg_max] { arg[i++] };
for(; i < arg_max - 1 && i - 1 < args.size(); ++i)
{
strlcpy(arg[i], args.at(i - 1));
argv[i] = arg[i];
}
argv[i++] = nullptr;
assert(i <= arg_max);
rocksdb::SSTDumpTool tool;
const int ret
{
tool.Run(i, argv)
};
if(ret != 0)
throw error
{
"Error from SST dump tool: return value: %d", ret
};
}
//
// sst::dump::dump
//
ircd::db::database::sst::dump::dump(db::column column,
const key_range &range,
const string_view &path_)
{
database::column &c(column);
const database &d(column);
std::string path
{
path_
};
if(path.empty())
{
const string_view path_parts[]
{
fs::base::db, db::name(d), db::name(c)
};
path = fs::path_string(path_parts);
}
rocksdb::Options opts(d.d->GetOptions(c));
rocksdb::EnvOptions eopts(opts);
rocksdb::SstFileWriter writer
{
eopts, opts, c
};
throw_on_error
{
writer.Open(path)
};
size_t i(0);
for(auto it(column.begin()); it != column.end(); ++it, ++i)
throw_on_error
{
writer.Put(slice(it->first), slice(it->second))
};
rocksdb::ExternalSstFileInfo info;
if(i)
throw_on_error
{
writer.Finish(&info)
};
this->info.column = db::name(column);
this->info.path = std::move(info.file_path);
this->info.min_key = std::move(info.smallest_key);
this->info.max_key = std::move(info.largest_key);
this->info.min_seq = info.sequence_number;
this->info.max_seq = info.sequence_number;
this->info.size = info.file_size;
this->info.entries = info.num_entries;
this->info.version = info.version;
}
//
// sst::info::vector
//
ircd::db::database::sst::info::vector::vector(const database &d)
{
this->reserve(db::file_count(d));
for(const auto &c : d.columns) try
{
assert(c);
db::column column{*c};
for(auto &&info : vector(column))
this->emplace_back(std::move(info));
}
catch(const ctx::interrupted &)
{
throw;
}
catch(const std::exception &e)
{
log::error
{
log, "[%s] Failed to query files for '%s' :%s",
db::name(d),
db::name(*c),
e.what(),
};
}
}
ircd::db::database::sst::info::vector::vector(const db::column &column)
{
database::column &c(mutable_cast(column));
database &d(*c.d);
rocksdb::ColumnFamilyMetaData cfmd;
d.d->GetColumnFamilyMetaData(c, &cfmd);
rocksdb::TablePropertiesCollection tpc;
throw_on_error
{
d.d->GetPropertiesOfAllTables(c, &tpc)
};
size_t i(0);
this->resize(std::max(cfmd.file_count, tpc.size()));
for(rocksdb::LevelMetaData &level : cfmd.levels)
for(rocksdb::SstFileMetaData md : level.files)
{
auto &info(this->at(i++));
info.operator=(std::move(md));
info.level = level.level;
const auto path(info.path + info.name);
auto tp(*tpc.at(path));
info.operator=(std::move(tp));
tpc.erase(path);
}
for(auto &&kv : tpc)
{
auto &info(this->at(i++));
auto tp(*kv.second);
info.operator=(std::move(tp));
info.path = kv.first;
}
assert(i == this->size());
}
//
// sst::info::info
//
ircd::db::database::sst::info::info(const database &d_,
const string_view &filename)
{
auto &d(mutable_cast(d_));
const ctx::uninterruptible::nothrow ui;
std::vector<rocksdb::LiveFileMetaData> v;
d.d->GetLiveFilesMetaData(&v);
for(auto &md : v)
if(md.name == filename)
{
rocksdb::TablePropertiesCollection tpc;
throw_on_error
{
d.d->GetPropertiesOfAllTables(d[md.column_family_name], &tpc)
};
auto tp(*tpc.at(md.db_path + md.name));
this->operator=(std::move(md));
this->operator=(std::move(tp));
return;
}
throw not_found
{
"No file named '%s' is live in database '%s'",
filename,
d.name
};
}
ircd::db::database::sst::info &
ircd::db::database::sst::info::operator=(rocksdb::LiveFileMetaData &&md)
{
column = std::move(md.column_family_name);
level = std::move(md.level);
this->operator=(static_cast<rocksdb::SstFileMetaData &&>(md));
return *this;
}
ircd::db::database::sst::info &
ircd::db::database::sst::info::operator=(rocksdb::SstFileMetaData &&md)
{
id = std::move(md.file_number);
name = std::move(md.name);
path = std::move(md.db_path);
size = std::move(md.size);
min_seq = std::move(md.smallest_seqno);
max_seq = std::move(md.largest_seqno);
min_key = std::move(md.smallestkey);
max_key = std::move(md.largestkey);
num_reads = std::move(md.num_reads_sampled);
compacting = std::move(md.being_compacted);
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR > 8) \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR == 8 && ROCKSDB_PATCH >= 1)
checksum = std::move(md.file_checksum);
checksum_func = std::move(md.file_checksum_func_name);
#endif
#if ROCKSDB_MAJOR > 6 \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR > 7) \
|| (ROCKSDB_MAJOR == 6 && ROCKSDB_MINOR == 7 && ROCKSDB_PATCH >= 3)
created = std::move(md.file_creation_time);
#endif
return *this;
}
ircd::db::database::sst::info &
ircd::db::database::sst::info::operator=(rocksdb::TableProperties &&tp)
{
column = std::move(tp.column_family_name);
filter = std::move(tp.filter_policy_name);
comparator = std::move(tp.comparator_name);
merge_operator = std::move(tp.merge_operator_name);
prefix_extractor = std::move(tp.prefix_extractor_name);
compression = std::move(tp.compression_name);
format = std::move(tp.format_version);
cfid = std::move(tp.column_family_id);
data_size = std::move(tp.data_size);
index_root_size = std::move(tp.top_level_index_size);
index_data_size = std::move(tp.index_size);
index_data_size -= index_root_size;
filter_size = std::move(tp.filter_size);
keys_size = std::move(tp.raw_key_size);
values_size = std::move(tp.raw_value_size);
index_parts = std::move(tp.index_partitions);
data_blocks = std::move(tp.num_data_blocks);
entries = std::move(tp.num_entries);
range_deletes = std::move(tp.num_range_deletions);
fixed_key_len = std::move(tp.fixed_key_len);
created = std::move(tp.creation_time);
oldest_key = std::move(tp.oldest_key_time);
delta_encoding = std::move(tp.index_value_is_delta_encoded);
blocks_size = keys_size + values_size;
index_size = index_data_size + index_root_size;
head_size = index_size + filter_size;
file_size = head_size + blocks_size;
meta_size = size > data_size?
size - data_size:
0UL;
compression_pct = file_size > size?
100 - 100.0L * (size / (long double)file_size):
0.0;
index_compression_pct = head_size > meta_size?
100 - 100.0L * (meta_size / (long double)head_size):
0.0;
blocks_compression_pct = blocks_size > data_size?
100 - 100.0L * (data_size / (long double)blocks_size):
0.0;
return *this;
}
///////////////////////////////////////////////////////////////////////////////
//
// database::wal
//
//
// wal::info::vector
//
ircd::db::database::wal::info::vector::vector(const database &d_)
{
auto &d{mutable_cast(d_)};
std::vector<std::unique_ptr<rocksdb::LogFile>> vec;
throw_on_error
{
d.d->GetSortedWalFiles(vec)
};
this->resize(vec.size());
for(size_t i(0); i < vec.size(); ++i)
this->at(i).operator=(*vec.at(i));
}
//
// wal::info::info
//
ircd::db::database::wal::info::info(const database &d_,
const string_view &filename)
{
auto &d{mutable_cast(d_)};
std::vector<std::unique_ptr<rocksdb::LogFile>> vec;
throw_on_error
{
d.d->GetSortedWalFiles(vec)
};
for(const auto &ptr : vec)
if(ptr->PathName() == filename)
{
this->operator=(*ptr);
return;
}
throw not_found
{
"No file named '%s' is live in database '%s'",
filename,
d.name
};
}
ircd::db::database::wal::info &
ircd::db::database::wal::info::operator=(const rocksdb::LogFile &lf)
{
name = lf.PathName();
number = lf.LogNumber();
seq = lf.StartSequence();
size = lf.SizeFileBytes();
alive = lf.Type() == rocksdb::WalFileType::kAliveLogFile;
return *this;
}
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