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From Todd Lipcon <t...@cloudera.com>
Subject Re: Update on hadoop-0.23
Date Fri, 30 Sep 2011 20:13:50 GMT
On Fri, Sep 30, 2011 at 11:44 AM, Roman Shaposhnik <rvs@apache.org> wrote:
> I apologize if my level of institutional knowledge of these things is
> lacking, but do you have any
> benchmarking results between 0.22 and 0.20.2xx? The reason I'm asking
> is twofold -- I really
> would like to see an objective numbers qualifying the viability of
> 0.22 from the performance stand point,
> but more importantly I would really like to include the benchmarking
> code into Bigtop.

0.22 currently suffers from MAPREDUCE-2266, which, last time I
benchmarked it, caused a significant slowdown. iirc a terasort ran
something like twice as slow on my test cluster due to this bug.
0.23/MR2 doesn't suffer from this bug.

Todd Lipcon
Software Engineer, Cloudera

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