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From Andrew Purtell <apurt...@apache.org>
Subject Re: [VOTE] The 1st HBase 0.98.4 release candidate (RC0) is available, vote closing 7/21/2014
Date Fri, 18 Jul 2014 00:51:00 GMT
Bisecting now.

I plan to find and revert the culprit and any related commits, confirm
improvement with workload E, push those changes back onto the pile for .5,
and roll .4 RC1 on or before Monday. Phoenix has a release deadline at the
end of the month and changes in .4 they need (if not the issue).


On Thu, Jul 17, 2014 at 5:12 PM, Andrew Purtell <apurtell@apache.org> wrote:

> See thread on dev@ titled "Comparing the performance of 0.98.4 RC0 and
> 0.98.0 using YCSB - 23% perf regression in workload E"
>
> -1 on this RC for now, pending reproduction and further analysis on a dev
> box.
>
> [...]
>
> These tests were run with no security coprocessors installed, using HFile
> V2. The workload E results are a concern. *It appears we have a 23%
> decline in measured scan throughput and an 23% increase in average op time
> from 27 ms to 35 ms. *This does not correspond to any active security
> feature (though that could worsen results potentially, untested) so is
> something changed in core code. Other workloads are not affected so this is
> something specific to scanning. Perhaps delete tracking.
>
> [...]
>
> *Workload E*
>
>
>
>
>
>
> [OVERALL] RunTime(ms)16009102078826 [OVERALL]Throughput(ops/sec) 63084835
> [INSERT] Operations499131500322 [INSERT]AverageLatency(us) 1417[INSERT]
> MinLatency(us)55 [INSERT]MaxLatency(us) 506079564468[INSERT]
> 95thPercentileLatency(ms)0 0[INSERT]99thPercentileLatency(ms) 00 [SCAN]
> Operations9500869 9499678[SCAN] AverageLatency(us)
> ​​
>  ​​
> 2663634620 [SCAN]MinLatency(us) 746755[SCAN] MaxLatency(us)8067864 4615914
> [SCAN]95thPercentileLatency(ms) 117136 [SCAN]99thPercentileLatency(ms)169
> 187
>
>
>
>
>
> On Mon, Jul 14, 2014 at 8:38 PM, Andrew Purtell <apurtell@apache.org>
> wrote:
>
>> The 1st HBase 0.98.4 release candidate (RC0) is available for download at
>> http://people.apache.org/~apurtell/0.98.4RC0/ and Maven artifacts are
>> also available in the temporary repository
>> https://repository.apache.org/content/repositories/orgapachehbase-1026/
>>
>> Signed with my code signing key D5365CCD.
>>
>> The issues resolved in this release can be found here:
>> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12326810
>>
>>
>> Please try out the candidate and vote +1/-1 by midnight Pacific Time
>> (00:00 -0800 GMT) on July 21 on whether or not we should release this as
>> 0.98.4. Three +1 votes from PMC will be required to release.
>>
>>


-- 
Best regards,

   - Andy

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

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