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ircd::db: Support universal compaction by default; various write tweaks.

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This commit is contained in:
Jason Volk 2020-09-12 03:42:16 -07:00
parent 1a7447837e
commit afe0b96249
4 changed files with 29 additions and 27 deletions
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2
include/ircd/db/descriptor.h
View file

@ -91,7 +91,7 @@ struct ircd::db::descriptor
db::compactor compactor {};
/// Compaction priority algorithm
std::string compaction_pri {"kOldestLargestSeqFirst"};
std::string compaction_pri {};
/// Compaction related parameters. see: rocksdb/advanced_options.h
struct

31
ircd/db.cc
View file

@ -2078,10 +2078,10 @@ ircd::db::database::column::column(database &d,
//TODO: descriptor / conf
this->options.write_buffer_size = 4_MiB;
this->options.max_write_buffer_number = 8;
this->options.min_write_buffer_number_to_merge = 4;
this->options.max_write_buffer_number_to_maintain = 0;
this->options.write_buffer_size = 1_MiB;
this->options.max_write_buffer_number = 16;
this->options.min_write_buffer_number_to_merge = 2;
this->options.max_write_buffer_number_to_maintain = 8;
// Conf item can be set to disable automatic compactions. For developers
// and debugging; good for valgrind.
@ -2089,8 +2089,12 @@ ircd::db::database::column::column(database &d,
// 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::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 =
@ -2105,8 +2109,9 @@ ircd::db::database::column::column(database &d,
rocksdb::CompactionPri::kOldestLargestSeqFirst;
this->options.num_levels = 7;
this->options.level0_file_num_compaction_trigger = 7;
this->options.level_compaction_dynamic_level_bytes = false;
this->options.level0_file_num_compaction_trigger = 8;
//this->options.ttl = -2U;
#ifdef IRCD_DB_HAS_PERIODIC_COMPACTIONS
this->options.periodic_compaction_seconds = this->descriptor->compaction_period.count();
@ -2137,13 +2142,13 @@ ircd::db::database::column::column(database &d,
// Universal compaction options; these are unused b/c we don't use this
// style; they are here for hacking an experimentation for now.
this->options.compaction_options_universal.size_ratio = 1;
this->options.compaction_options_universal.min_merge_width = 2;
this->options.compaction_options_universal.max_merge_width = UINT_MAX;
this->options.compaction_options_universal.max_size_amplification_percent = 200;
this->options.compaction_options_universal.size_ratio = 67;
this->options.compaction_options_universal.min_merge_width = 8;
this->options.compaction_options_universal.max_merge_width = 10;
this->options.compaction_options_universal.max_size_amplification_percent = 1000;
this->options.compaction_options_universal.compression_size_percent = -1;
this->options.compaction_options_universal.stop_style = rocksdb::kCompactionStopStyleTotalSize;
this->options.compaction_options_universal.allow_trivial_move = false;;
this->options.compaction_options_universal.allow_trivial_move = false;
//
// Table options
@ -2156,7 +2161,7 @@ ircd::db::database::column::column(database &d,
table_opts.format_version = 4; // RocksDB >= 5.16.x compat only; otherwise use 3.
table_opts.index_type = rocksdb::BlockBasedTableOptions::kTwoLevelIndexSearch;
table_opts.index_block_restart_interval = 16;
table_opts.index_block_restart_interval = 1;
table_opts.read_amp_bytes_per_bit = 8;
// Specify that index blocks should use the cache. If not, they will be
@ -2186,7 +2191,7 @@ ircd::db::database::column::column(database &d,
table_opts.block_size = this->descriptor->block_size;
table_opts.metadata_block_size = this->descriptor->meta_block_size;
table_opts.block_size_deviation = 50;
table_opts.block_restart_interval = 32;
table_opts.block_restart_interval = 16;
//table_opts.data_block_index_type = rocksdb::BlockBasedTableOptions::kDataBlockBinaryAndHash;
//table_opts.data_block_hash_table_util_ratio = 0.75;

14
matrix/dbs_event_json.cc
View file

@ -113,25 +113,13 @@ ircd::m::dbs::desc::event_json
{},
// compaction priority algorithm
"kOldestLargestSeqFirst"s,
"Universal"s,
// target_file_size
{
2_GiB, // base
1L, // multiplier
},
// max_bytes_for_level[8]
{
{ 128_MiB, 1L }, // max_bytes_for_level_base
{ 0L, 0L }, // max_bytes_for_level[0]
{ 0L, 1L }, // max_bytes_for_level[1]
{ 0L, 1L }, // max_bytes_for_level[2]
{ 0L, 3L }, // max_bytes_for_level[3]
{ 0L, 7L }, // max_bytes_for_level[4]
{ 0L, 15L }, // max_bytes_for_level[5]
{ 0L, 31L }, // max_bytes_for_level[6]
},
};
//

9
matrix/dbs_room_type.cc
View file

@ -140,6 +140,15 @@ ircd::m::dbs::desc::room_type
// meta_block size
size_t(room_type__meta_block__size),
// compression
"kLZ4Compression;kSnappyCompression"s,
// compactor
{},
// compaction priority algorithm
"kOldestSmallestSeqFirst"s,
};
//