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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: [VOTE] Release 'development release' HBase 0.89.2010830 rc2?
Date Wed, 15 Sep 2010 23:47:26 GMT
Ted,

Just to be clear, the issue isn't ZK, it's us. HBASE-2694 was a
stepping stone, but the master rewrite ended up in it's own branch.
That stepping stone isn't needed to run HBase properly.

J-D

On Wed, Sep 15, 2010 at 4:44 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> Looping in Patrick who may have insight for
> https://issues.apache.org/jira/browse/HBASE-2694
>
> On Wed, Sep 15, 2010 at 4:35 PM, Jean-Daniel Cryans <jdcryans@apache.org>wrote:
>
>> After some discussions today here at SU between Todd and the team, it
>> was suggested that this 0.89 release contains more of what we run in
>> production here. One major difference is that we reverted most of
>> HBASE-2694 since we had issues with the ZK-based assignment, didn't
>> know exactly how many other issues lurked in there, that most of those
>> fixes would probably not apply to the new master, and that it was
>> generally much slower than the pre-2694 master. I also helped Vidhya
>> with his 700 nodes today by patching 0.89.20100830 with 2694's revert,
>> and starting his cluster became much more faster.
>>
>> tl;dr I propose that we sink this RC and build a new one with 2694
>> reverted (except for the core ZKW changes).
>>
>> What do the devs think?
>>
>> Thx,
>>
>> J-D
>>
>> On Mon, Sep 13, 2010 at 5:14 PM, Jean-Daniel Cryans <jdcryans@apache.org>
>> wrote:
>> > Second RC, new vote!
>> >
>> > Source binary and source tar balls are available here:
>> >
>> >  http://people.apache.org/~jdcryans/hbase-0.89.20100830-candidate-2/<http://people.apache.org/%7Ejdcryans/hbase-0.89.20100830-candidate-2/>
>> >
>> > You can also browse the candidate documentation here:
>> >
>> >
>> http://people.apache.org/~jdcryans/hbase-0.89.20100830-candidate-2/hbase-0.89.20100830/docs/<http://people.apache.org/%7Ejdcryans/hbase-0.89.20100830-candidate-2/hbase-0.89.20100830/docs/>
>> >
>> > Issues resolved since 0.89.20100726, our second 0.89.x release, are
>> > roughly ~23 issues odd including fixed deadlocks, better handling of
>> > IOEs during splits and improvements for filters: see
>> > http://su.pr/2HwiUe. 3 issues were also fixed for RC2:
>> >
>> > HBASE-2975 DFSClient names in master and RS should be unique
>> > HBASE-2967 Failed split: IOE 'File is Corrupt' -- sync length not
>> > being written out to SequenceFile
>> > HBASE-2964 Deadlock when RS tries to RPC to itself inside
>> SplitTransaction
>> >
>> > Shall we release this candidate as the third in our 0.89.x series of
>> > developer releases?
>> >
>> > Please see previous threads on 0.89 releases for more information
>> > about the purpose of this release candidate - in particular, this
>> > 'developer release' is for those who can tolerate risk and who are
>> > willing to give feedback in advance of our next major release.  We're
>> > not making any guarantees that this is bug free. Its definitely not
>> > for production deploys.
>> >
>> > We'll do another release like this in a few weeks after the new master
>> > code has gone in.
>> >
>> > Please vote by Thursday, September 16th.
>> >
>> > Thanks,
>> >
>> > J-D
>> >
>>
>

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