On Tue, Jul 21, 2009 at 09:28:54PM -0700, MARK CALLAGHAN wrote: > How is the serial log to be kept in sync with a storage engine given > the Applier interface? MySQL uses two phase commit, but the Applier > interface has one method, ::apply(). In addition to methods for > performing 2PC, keeping a storage engine and the serial log in sync > requires additional methods for crash recovery to support commit or > rollback of transactions in state PREPARED in the storage engine > depending on the outcome recorded in the serial log.
The bit that keeps banging in my head in regards to this is storing it in the same engine as part of the transaction and so avoiding 2pc. Then, in 99.9% of cases when there are not cross engine transactions, we never need 2pc. Although I haven't given this intense deep thought as to various corner cases... -- Stewart Smith _______________________________________________ Mailing list: https://launchpad.net/~drizzle-discuss Post to : [email protected] Unsubscribe : https://launchpad.net/~drizzle-discuss More help : https://help.launchpad.net/ListHelp
