database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-08 11:22:35 +03:00
Code Activity

MDEV-6676: Optimistic parallel replication

Browse Source 
Adjust the configuration options, as discussed on the
maria-developers@ mailing list.

The option to hint a transaction to not be replicated in parallel is
now called @@skip_parallel_replication, consistent with
@@skip_replication.

And the --slave-parallel-mode is now simplified to have just one of
the following values:

  none
  minimal
  conservative
  optimistic
  aggressive

This reflects successively harder efforts to find opportunities to run
things in parallel on the slave. It allows to extend the server with
more automatic heuristics in the future without having to introduce a
new configuration option for each and every one.
This commit is contained in:
Kristian Nielsen
2015-02-06 10:02:02 +01:00
parent 734c4c0143
commit 8672339328
41 changed files with 243 additions and 265 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
sql/rpl_parallel.cc
View File

@@ -2013,7 +2013,7 @@ rpl_parallel::do_event(rpl_group_info *serial_rgi, Log_event *ev,
{
Gtid_log_event *gtid_ev= static_cast<Gtid_log_event *>(ev);
uint32 domain_id= (rli->mi->using_gtid == Master_info::USE_GTID_NO ||
!(rli->mi->parallel_mode & SLAVE_PARALLEL_DOMAIN) ?
rli->mi->parallel_mode <= SLAVE_PARALLEL_MINIMAL ?
0 : gtid_ev->domain_id);
if (!(e= find(domain_id)))
{
@@ -2054,7 +2054,7 @@ rpl_parallel::do_event(rpl_group_info *serial_rgi, Log_event *ev,
{
Gtid_log_event *gtid_ev= static_cast<Gtid_log_event *>(ev);
bool new_gco;
ulonglong mode= rli->mi->parallel_mode;
enum_slave_parallel_mode mode= rli->mi->parallel_mode;
uchar gtid_flags= gtid_ev->flags2;
group_commit_orderer *gco;
uint8 force_switch_flag;
@@ -2093,7 +2093,8 @@ rpl_parallel::do_event(rpl_group_info *serial_rgi, Log_event *ev,
{
uint8 flags= gco->flags;
if (!(gtid_flags & Gtid_log_event::FL_GROUP_COMMIT_ID) ||
if (mode <= SLAVE_PARALLEL_MINIMAL ||
!(gtid_flags & Gtid_log_event::FL_GROUP_COMMIT_ID) ||
e->last_commit_id != gtid_ev->commit_id)
flags|= group_commit_orderer::MULTI_BATCH;
/* Make sure we do not attempt to run DDL in parallel speculatively. */
@@ -2108,7 +2109,7 @@ rpl_parallel::do_event(rpl_group_info *serial_rgi, Log_event *ev,
*/
new_gco= false;
}
else if ((mode & SLAVE_PARALLEL_TRX) &&
else if ((mode >= SLAVE_PARALLEL_OPTIMISTIC) &&
!(flags & group_commit_orderer::FORCE_SWITCH))
{
/*
@@ -2124,9 +2125,9 @@ rpl_parallel::do_event(rpl_group_info *serial_rgi, Log_event *ev,
*/
new_gco= false;
if (!(gtid_flags & Gtid_log_event::FL_TRANSACTIONAL) ||
!(gtid_flags & Gtid_log_event::FL_ALLOW_PARALLEL) ||
((gtid_flags & Gtid_log_event::FL_WAITED) &&
!(mode & SLAVE_PARALLEL_WAITING)))
( (!(gtid_flags & Gtid_log_event::FL_ALLOW_PARALLEL) ||
(gtid_flags & Gtid_log_event::FL_WAITED)) &&
(mode < SLAVE_PARALLEL_AGGRESSIVE)))
{
/*
This transaction should not be speculatively run in parallel with