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Date: Tue, 18 Jan 2011 11:24:34 -0800
Message-ID: <AANLkTinRy2a82Ny8F2jjnwug48skf_mVBPVyT7XW2DTx@mail.gmail.com>
Subject: Re: ANN: The fourth hbase 0.90.0 release candidate is available for
 download X
From: Jean-Daniel Cryans <jdcryans@apache.org>
To: dev@hbase.apache.org
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+1, ran the tests, checked out the docs, gave it a ride.

J-D

On Fri, Jan 7, 2011 at 5:03 PM, Stack <stack@duboce.net> wrote:
> The fourth hbase 0.90.0 release candidate is available for download:
>
> =A0http://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? =A0Take it for a spin.
> Check out the doc., etc. =A0Vote +1/-1 by next Friday, the 14th of Januar=
y.
>
> 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. =A0Release notes are
> available here: http://su.pr/8LbgvK.
>
> HBase 0.90.0 runs on Hadoop 0.20.x. =A0It does not currently run on
> Hadoop 0.21.0 nor on Hadoop TRUNK. =A0 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). =A0CDH3b2 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. =A0Your data written with HBase 0.20.x
> (or with HBase 0.89.x) is readable by HBase 0.90.0. =A0A shutdown and
> restart after putting in place the new HBase should be all thats
> involved. =A0That said, once done, there is no going back to 0.20.x once
> the transition has been made. =A0 HBase 0.90.0 and HBase 0.89.x write
> region names differently in the filesystem. =A0Rolling 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/
>