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From Sean Busbey <bus...@cloudera.com>
Subject Re: [VOTE] Merge branch hbase-11339 HBase MOB to trunk
Date Mon, 20 Jul 2015 21:32:48 GMT
+1

-- 
Sean
On Jul 17, 2015 2:01 AM, "Jingcheng Du" <jingcheng.du@intel.com> wrote:

> Hi all,
>
> The Moderate Object Storage (MOB) feature (HBASE-11339[1]) is modified I/O
> and compaction path that allows individual moderately sized values
> (100KB-10MB) to be stored so that write amplification is reduced when
> compared to the normal I/O path. MOB is defined in the column family
> and it is almost isolated with other components, the features and
> performance
> cannot be effected in normal columns. A detailed design doc and user guide
> can
> be found on the hbase-11339 jira. The code reside in the feature branch
> hbase-11339[2], and now the latest mega patch for trunk is
> available in RB[3].
>
> Jon had brought this in another DISCUSSION thread some days ago. We
> collected
> all the feedbacks there and had tried to incorporate them.
>
> Some improvements, like encryption of mob files, finding
> corrupt mob files and dangling reference cells, have been implemented.
>
> The other point that was discussed is the use of MR for doing the MOB
> compaction in phase-1
> of the implementation. Now the dependency is removed, we have an inbuilt
> MOB
> compaction that
> can be run automatically and it does not need MR anymore. Still the MR
> compaction is provided
> as a tool for users.
>
> Considering the fact that the concerns from the discussion thread have been
> addressed, we are putting
> the merge to trunk up for a vote.
> [] +1 proceed with merge to trunk.
> [] 0 no opinion
> [] -1 do not merge to trunk, because ...
>
> Our current merge vote policy requires at least 3 +1s from committers to
> move forward[4]. The vote runs for 72 hours (the weekends are excluded),
> and
> it will be closed at the midnight of
> Tuesday July 21 PDT.
>
> Thanks,
> Jingcheng, Jon, Ram and Anoop.
>
> [1]: https://issues.apache.org/jira/browse/HBASE-11339
> [2]: https://github.com/apache/hbase/tree/hbase-11339
> [3]: https://reviews.apache.org/r/36391/
> [4]: https://hbase.apache.org/book.html#_decisions
>
>
>
> --
> View this message in context:
> http://apache-hbase.679495.n3.nabble.com/VOTE-Merge-branch-hbase-11339-HBase-MOB-to-trunk-tp4073308.html
> Sent from the HBase Developer mailing list archive at Nabble.com.
>

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