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construct: Add program option to disable direct IO.

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This commit is contained in:
Jason Volk 2018-09-03 07:59:05 -07:00
parent 80d0db9f26
commit 60a0694853
4 changed files with 4 additions and 1 deletions
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1
construct/construct.cc
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@ -57,6 +57,7 @@ lgetopt opts[] =
{ "checkdb", &ircd::checkdb, lgetopt::BOOL, "Perform complete checks of databases when opening" },
{ "pitrecdb", &ircd::pitrecdb, lgetopt::BOOL, "Allow Point-In-Time-Recover if DB reports corruption after crash" },
{ "nojs", &ircd::nojs, lgetopt::BOOL, "Disable SpiderMonkey JS subsystem from initializing. (noop when not available)." },
{ "nodirect", &ircd::nodirect, lgetopt::BOOL, "Disable direct IO (O_DIRECT) for unsupporting filesystems." },
{ nullptr, nullptr, lgetopt::STRING, nullptr },
};

1
include/ircd/ircd.h
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@ -26,6 +26,7 @@ namespace ircd
extern bool checkdb; ///< Perform checks on database opens
extern bool pitrecdb; ///< Allow Point-In-Time Recovery if DB corrupt.
extern bool nojs; ///< Option to not init js subsystem.
extern bool nodirect; ///< Option to not use direct IO (O_DIRECT).
}
#include "string_view.h"

2
ircd/db.cc
View file

@ -772,7 +772,7 @@ try
opts.allow_concurrent_memtable_write = false;
opts.enable_write_thread_adaptive_yield = false;
opts.enable_pipelined_write = false;
opts.use_direct_reads = true;
opts.use_direct_reads = !ircd::nodirect;
opts.write_thread_max_yield_usec = 0;
opts.write_thread_slow_yield_usec = 0;
opts.use_direct_io_for_flush_and_compaction = false;

1
ircd/ircd.cc
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@ -19,6 +19,7 @@ namespace ircd
bool checkdb; // check databases when opening
bool pitrecdb; // point-in-time recovery for db
bool nojs; // no ircd::js system init.
bool nodirect; // no use of O_DIRECT.
std::string _hostname; // user's supplied param
boost::asio::io_context *ios; // user's io service