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BUG#35542 Add option to sync master and relay log to disk after every event

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BUG#31665 sync_binlog should cause relay logs to be synchronized

NOTE: Backporting the patch to next-mr.
      
Add sync_relay_log option to server, this option works for relay log 
the same as option sync_binlog for binlog. This option also synchronize
master info to disk when set to non-zero value.
            
Original patches from Sinisa and Mark, with some modifications
This commit is contained in:
Alfranio Correia
2009-09-29 15:27:12 +01:00
parent 63278c561c
commit 4e0cb6dbb7
9 changed files with 121 additions and 40 deletions
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29
sql/log.h
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@ -269,6 +269,18 @@ class MYSQL_BIN_LOG: public TC_LOG, private MYSQL_LOG
ulonglong m_table_map_version;
/* pointer to the sync period variable, for binlog this will be
sync_binlog_period, for relay log this will be
sync_relay_log_period
*/
uint *sync_period_ptr;
uint sync_counter;
inline uint get_sync_period()
{
return *sync_period_ptr;
}
int write_to_file(IO_CACHE *cache);
/*
This is used to start writing to a new log file. The difference from
@ -296,7 +308,7 @@ public:
Format_description_log_event *description_event_for_exec,
*description_event_for_queue;
MYSQL_BIN_LOG();
MYSQL_BIN_LOG(uint *sync_period);
/*
note that there's no destructor ~MYSQL_BIN_LOG() !
The reason is that we don't want it to be automatically called
@ -378,7 +390,20 @@ public:
bool is_active(const char* log_file_name);
int update_log_index(LOG_INFO* linfo, bool need_update_threads);
void rotate_and_purge(uint flags);
bool flush_and_sync();
/**
Flush binlog cache and synchronize to disk.
This function flushes events in binlog cache to binary log file,
it will do synchronizing according to the setting of system
variable 'sync_binlog'. If file is synchronized, @c synced will
be set to 1, otherwise 0.
@param[out] synced if not NULL, set to 1 if file is synchronized, otherwise 0
@retval 0 Success
@retval other Failure
*/
bool flush_and_sync(bool *synced);
int purge_logs(const char *to_log, bool included,
bool need_mutex, bool need_update_threads,
ulonglong *decrease_log_space);