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From Todd Lipcon <t...@cloudera.com>
Subject Re: High Availability Framework for HDFS Namenode in 2.0.0
Date Thu, 03 May 2012 17:29:07 GMT
Hi Shi,

The 20% regression was prior to implementing a few optimizations on the
branch. Here's the later comment:

Also, the 20% measurement was on a particular stress test designed to
target exactly the metadata code path we figured there might be performance

So on typical clusters with typical workloads, you shouldn't find any
measurable difference.


On Thu, May 3, 2012 at 8:38 AM, Shi Yu <shiyu@uchicago.edu> wrote:

> Hi Harsh J,
> It seems that the 20% performance lost is not that bad, at least some
> smart people are still working to improve it. I will keep an eye on this
> interesting trend.
> Shi

Todd Lipcon
Software Engineer, Cloudera

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