chromatic wrote: > On Monday 04 August 2008 13:37:25 Mats Kindahl wrote: > >> The format I am considering is basically a combined redo-undo log. This >> would mean that it would be possible to run the log both backwards and >> forwards, so the situation you describe could easily be solved by >> running the log backwards and then start replication from a different >> position, effectively skipping a set of events. > > If statements were bytecode, you could use the command pattern and distribute > the bytecode to replicants.
It would be nice to have the statements as byte codes (I've discussed this with several people internally, but it is quite a big job), but it still leaves the "statements" operational. This basically means they have the same problems as the text-based statement replication: there will be a need to maintain a state on the master and the slave. Best wishes, Mats Kindahl -- Mats Kindahl Lead Software Developer Replication Team MySQL AB, www.mysql.com
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