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From Paul Davis <paul.joseph.da...@gmail.com>
Subject Re: replication patches and new _ensure_full_commit feature
Date Tue, 25 Aug 2009 04:41:28 GMT
+1

On Mon, Aug 24, 2009 at 11:26 PM, Adam Kocoloski<kocolosk@apache.org> wrote:
> Hi all, I committed a good bit of replication-related code today and wanted
> to check with the list regarding the 0.10 branch.  Here's what I changed ..
>
> one flat-out bugfix,
> r807308, r807354: more precise and accurate calculation of replication
> progress
>
> one new feature that could be classified as a bugfix depending on your
> point-of-view,
> r807342, r807345: follow 302 redirects during replication
>
> and two significant performance improvements (thanks rnewson for all the
> stress testing):
> r807320, r807360: checkpoint at most once per 5 seconds
> r807208, r807459, r807461: minimize the number of full commit operations
>
> There's another new feature hiding in that last set of commits, namely the
> ability to do a restricted full commit
>
> POST /db/_ensure_full_commit?seq=N
>
> which guarantees that everything up to and including update_seq N will be
> synced to disk.  This is a weaker guarantee than a vanilla
> _ensure_full_commit, and as a result it can be much faster in certain
> situations (e.g. replication from a server experiencing a heavy batch=ok
> write load).
>
> I'd like to merge all of these into the 0.10 branch if that abides by our
> release policies. Best,
>
> Adam
>

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