Differences between Percona MyRocks and Facebook MyRocks¶
The original MyRocks was developed by Facebook and works with their implementation of MySQL. Percona MyRocks is a branch of MyRocks for Percona Server for MySQL and includes the following differences from the original implementation:
The behavior of the
START TRANSACTION WITH CONSISTENT SNAPSHOT
statement depends on the transaction isolation level.Storage Engine Transaction isolation level READ COMMITTED
REPEATABLE READ
InnoDB Success Success Facebook MyRocks Fail Success (MyRocks engine only; read-only, as all MyRocks engine snapshots) Percona MyRocks Fail with any DML which would violate the read-only snapshot constraint Success (read-only snapshots independent of the engines in use) Percona MyRocks includes the
lz4
andzstd
statically linked libraries.
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