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From Graham Baecher <gbaec...@hubspot.com>
Subject Re: write performance regression in CDH 5.9?
Date Fri, 18 Nov 2016 17:11:53 GMT
Thanks Jeremy.
I ran the regressed workload this morning with FIFO enabled and though it
was faster, it looks like it was a flat ~1ms faster for both reads and
writes. This doesn't compensate for the write performance dropoff, so even
with FIFO our 5.9 writes are slower than 5.8.

On Fri, Nov 18, 2016 at 11:29 AM, Jeremy Carroll <phobos182@gmail.com>
wrote:

> Use FIFO. Much better in our testing
>
> On Fri, Nov 18, 2016 at 7:46 AM Graham Baecher <gbaecher@hubspot.com>
> wrote:
>
> > Hi all,
> >
> > We're looking to update the HBase version we're running on our servers,
> but
> > noticed while comparing performance test results a the previous version
> > that Puts now seem to be slower.
> > Specifically, comparing HBase 1.2.0-cdh5.9.0 to 1.2.0-cdh5.8.0 using
> YCSB,
> > it looks like mean read latency is improved in cdh5.9 but mean write
> > latency is worse, and the net effect in a 50% read/50% write workload is
> a
> > performance degradation. FWIW, we've been testing with
> > `hbase.ipc.server.callqueue.type` = "deadline" on both versions.
> >
> > Has anyone else using CDH 5.9.0 HBase run into this, or know what might
> be
> > the cause?
> >
> > ~Graham
> >
>

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