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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: the release after 0.5
Date Mon, 18 Jan 2010 18:57:18 GMT
I've moved the already-committed-as-0.9 issues to 0.6, and created a
new 0.7 version for tickets that do not fit the goal of a quick
release fully compatible with 0.5.

-Jonathan

On Fri, Jan 8, 2010 at 2:06 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
> In the month since 0.5 was branched, we've already made some
> significant progress, particularly in performance.  I can't find a way
> to easily link the full list in Jira, but these include
>
>  408+669 (mmapping sstables for reads instead of using buffered I/O):
> ~50% speed improvement
>  658 (better write concurrency): ~1000% improvement when cluster is
> in degraded state
>  675 (faster communication between nodes): ~100% improvement of reads
> and writes
>  678 (row level caching): up to 120% improvement of reads (workload dependent)
>
> We also have some other interesting tickets done:
>  336: add the ability to insert data to multiple rows at once -- like
> multiget, but for writes
>  535: expose StorageProxy to use as a fat client (with
> StorageService.initClient)
>  599: give some visibility of what Compaction is busy doing (can be a
> major source of "why is it slow?")
>
> We have a lot of other issues tagged 0.9
> (https://issues.apache.org/jira/secure/IssueNavigator.jspa?reset=true&mode=hide&sorter/order=DESC&sorter/field=priority&resolution=-1&pid=12310865&fixfor=12314361),
> but the above issues and the others done so far are already useful
> enough to release, both because it helps our existing users of 0.5
> [note that none of these introduce compatibility issues of any sort,
> which makes upgrading especially easy], and because improving
> performance by that much makes us look better, which helps grow the
> community. :)
>
> On the other hand, creating and stabilizing and testing a new release
> (that is not bugfix-only) is a non-negligible amount of overhead, and
> I would give extra weight to Eric Evans's opinion here as release
> manager.
>
> -Jonathan
>

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