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From Stack <st...@duboce.net>
Subject Re: write performance regression in CDH 5.9?
Date Fri, 18 Nov 2016 18:20:59 GMT
On Fri, Nov 18, 2016 at 7:46 AM, Graham Baecher <gbaecher@hubspot.com>

> 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?
Hey Graham:

If you do pure YCSB write, do you see a difference? You updated HBase and
HDFS? Whats cluster size and commands you are running so can try replicate?

You are using a vendor's hbase so we'd suggest you go ping the vendor on
their mailing lists. That said, I'm interested if a regression in the 1.2
line (I'm not sure anyone has run compares of patch versions on 1.2 line).
I'm game for trying to figure which commit was responsible. I
opened HBASE-17128 as a working issue on which we can ping/pong
configs/test runs.


> ~Graham

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