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MDEV-4506: Parallel replication: intermediate commit.

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Fix a bunch of issues found with locking, ordering, and non-thread-safe stuff
in Relay_log_info.

Now able to do a simple benchmark, showing 4.5 times speedup for applying a
binlog with 10000 REPLACE statements.
This commit is contained in:
unknown
2013-07-08 16:47:07 +02:00
parent e654be3865
commit a99356fbe7
8 changed files with 109 additions and 65 deletions
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12
sql/rpl_rli.h
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@@ -604,6 +604,7 @@ private:
struct rpl_group_info
{
Relay_log_info *rli;
THD *thd;
/*
Current GTID being processed.
The sub_id gives the binlog order within one domain_id. A zero sub_id
@@ -630,10 +631,19 @@ struct rpl_group_info
*/
uint64 wait_commit_sub_id;
struct rpl_group_info *wait_commit_group_info;
/*
If non-zero, the event group must wait for this sub_id to be committed
before the execution of the event group is allowed to start.
(When we execute in parallel the transactions that group committed
together on the master, we still need to wait for any prior transactions
to have commtted).
*/
uint64 wait_start_sub_id;
struct rpl_parallel_entry *parallel_entry;
rpl_group_info(Relay_log_info *rli);
rpl_group_info(Relay_log_info *rli_);
~rpl_group_info() { };
};