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MDEV-6676: Optimistic parallel replication

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Implement a new mode for parallel replication. In this mode, all transactions
are optimistically attempted applied in parallel. In case of conflicts, the
offending transaction is rolled back and retried later non-parallel.

This is an early-release patch to facilitate testing, more changes to user
interface / options will be expected. The new mode is not enabled by default.
This commit is contained in:
Kristian Nielsen
2014-12-05 16:09:48 +01:00
parent 1e3f09f163
commit db21fddc37
55 changed files with 2596 additions and 466 deletions
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1
sql/sql_parse.cc
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@ -6646,6 +6646,7 @@ void THD::reset_for_next_command()
{
thd->variables.option_bits&= ~OPTION_KEEP_LOG;
thd->transaction.all.modified_non_trans_table= FALSE;
thd->transaction.all.m_unsafe_rollback_flags&= ~THD_TRANS::DID_WAIT;
}
DBUG_ASSERT(thd->security_ctx== &thd->main_security_ctx);
thd->thread_specific_used= FALSE;