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MDEV-162 Enhanced semisync replication

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Implement --semi-sync-master-wait-point=AFTER_SYNC|AFTER_COMMIT.

When AFTER_SYNC, the semi-sync wait will be done earlier, before the storage
engine commit rather than after. This means that a transaction will not be
visible on the master until at least one slave has received it.
This commit is contained in:
Jonas Oreland
2014-12-23 13:38:00 +01:00
committed by Kristian Nielsen
parent 4d8b346e07
commit 0b87de124d
29 changed files with 1735 additions and 46 deletions
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29
sql/rpl_handler.cc
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@ -252,12 +252,18 @@ int Trans_delegate::after_rollback(THD *thd, bool all)
int Binlog_storage_delegate::after_flush(THD *thd,
const char *log_file,
my_off_t log_pos,
bool synced)
bool synced,
bool first_in_group,
bool last_in_group)
{
Binlog_storage_param param;
uint32 flags=0;
if (synced)
flags |= BINLOG_STORAGE_IS_SYNCED;
if (first_in_group)
flags|= BINLOG_GROUP_COMMIT_LEADER;
if (last_in_group)
flags|= BINLOG_GROUP_COMMIT_TRAILER;
Trans_binlog_info *log_info=
my_pthread_getspecific_ptr(Trans_binlog_info*, RPL_TRANS_BINLOG_INFO);
@ -279,6 +285,27 @@ int Binlog_storage_delegate::after_flush(THD *thd,
return ret;
}
int Binlog_storage_delegate::after_sync(THD *thd,
const char *log_file,
my_off_t log_pos,
bool first_in_group,
bool last_in_group)
{
Binlog_storage_param param;
uint32 flags=0;
if (first_in_group)
flags|= BINLOG_GROUP_COMMIT_LEADER;
if (last_in_group)
flags|= BINLOG_GROUP_COMMIT_TRAILER;
int ret= 0;
FOREACH_OBSERVER(ret, after_sync, thd,
(&param, log_file+dirname_length(log_file), log_pos, flags));
return ret;
}
#ifdef HAVE_REPLICATION
int Binlog_transmit_delegate::transmit_start(THD *thd, ushort flags,
const char *log_file,