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Re: [Commits] Rev 4376: MDEV-6676: Speculative parallel replication in http://bazaar.launchpad.net/~maria-captains/maria/10.0


Robert Hodges <robert.hodges@xxxxxxxxxxxxxx> writes:

> What would be cool is something like a group transaction that other threads
> can join so that the commit becomes atomic. Most of the parallel load use
> cases I can think of don't require you to coordinate things like isolation
> because they are conflict free anyway--it's just atomic group commit.

Hm, I don't quite have this.

Given T1 and T2, there is a facility to ensure that T2 will commit no sooner
than T1. But there is no facility to prevent T1 from commiting before T2.

(This is what was needed for parallel replication).

 - Kristian.

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