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From Jonathan Gray <jg...@fb.com>
Subject RE: The fourth hbase 0.90.0 release candidate is available for download X
Date Fri, 14 Jan 2011 22:10:42 GMT
+1 on RC3.  Been running this in pre-production without issue for a while.

> -----Original Message-----
> From: saint.ack@gmail.com [mailto:saint.ack@gmail.com] On Behalf Of Stack
> Sent: Friday, January 07, 2011 5:03 PM
> To: HBase Dev List
> Subject: ANN: The fourth hbase 0.90.0 release candidate is available for
> download X
> The fourth hbase 0.90.0 release candidate is available for download:
>  http://people.apache.org/~stack/hbase-0.90.0-candidate-3/
> This is going to be the one!
> Should we release this candidate as hbase 0.90.0?  Take it for a spin.
> Check out the doc., etc.  Vote +1/-1 by next Friday, the 14th of January.
> HBase 0.90.0 is the major HBase release that follows 0.20.0 and the fruit of
> the 0.89.x development release series we've been running of late.
> Over 1k issues have been closed since 0.20.0.  Release notes are available
> here: http://su.pr/8LbgvK.
> HBase 0.90.0 runs on Hadoop 0.20.x.  It does not currently run on
> Hadoop 0.21.0 nor on Hadoop TRUNK.   HBase will lose data unless it is
> running on an Hadoop HDFS 0.20.x that has a durable sync. Currently only the
> branch-0.20-append branch [1] has this attribute (See CHANGES.txt [3] in
> branch-0.20-append to see the list of patches involved adding an append).
> No official releases have been made from this branch as yet so you will have
> to build your own Hadoop from the tip of this branch, OR install Cloudera's
> CDH3 [2] (Its currently in beta).  CDH3b2 or CDHb3 have the 0.20-append
> patches needed to add a durable sync. If using CDH, be sure to replace the
> hadoop jars that are bundled with HBase with those from your CDH
> distribution.
> There is no migration necessary.  Your data written with HBase 0.20.x (or with
> HBase 0.89.x) is readable by HBase 0.90.0.  A shutdown and restart after
> putting in place the new HBase should be all thats involved.  That said, once
> done, there is no going back to 0.20.x once
> the transition has been made.   HBase 0.90.0 and HBase 0.89.x write
> region names differently in the filesystem.  Rolling restart from 0.20.x or
> 0.89.x to 0.90.0RC1 will not work.
> Yours,
> The HBasistas
> P.S. For why the version 0.90 and whats new in HBase 0.90, see slides
> 4-10 in this deck [4]
> 1. http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-
> append
> 2. http://archive.cloudera.com/docs/
> 3. http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-
> append/CHANGES.txt
> 4. http://hbaseblog.com/2010/07/04/hug11-hbase-0-90-preview-wrap-up/

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