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From Andrew Purtell <apurt...@apache.org>
Subject Re: Major compactions and OS cache
Date Thu, 17 Feb 2011 08:52:55 GMT
On Wed, 2/16/11, Ryan Rawson <ryanobjc@gmail.com> wrote:
> Again, see HDFS-347, which is a huge
> clear win but still no plans to include it in any hadoop
> version.

I ported Ryan's patch for 0.20-append on HDFS-347 on top of CDH3B3 and it's going into preproduction.
We might be a bit more aggressive than average (also have pooling patch from HDFS-918) but
40-50% latency reduction is... intriguing. I can report on our experiences if anyone in Cloudera-land
is interested.

Best regards,

    - Andy

Problems worthy of attack prove their worth by hitting back.
  - Piet Hein (via Tom White)





      

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