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From Stack <st...@duboce.net>
Subject Re: ANN: The third hbase 0.90.0 release candidate is available for download
Date Tue, 04 Jan 2011 00:45:05 GMT
Good stuff.  New RC should be up soon.
St.Ack

On Mon, Jan 3, 2011 at 4:30 PM, Todd Lipcon <todd@cloudera.com> wrote:
> -1 for the following bugs:
>
> HBASE-3403 - Region orphaned if RS fails during split  (stack and I working
> on it)
> HBASE-3344 - Master aborts after RPC to server that was shutting down (stack
> fixed)
>
> But I feel like we're getting close!
>
> -Todd
>
> On Thu, Dec 23, 2010 at 3:43 PM, Stack <stack@duboce.net> wrote:
>
>> The third hbase 0.90.0 release candidate is available for download:
>>
>>  http://people.apache.org/~stack/hbase-0.90.0-candidate-2/
>>
>> 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.
>>
>> Should we release this candidate as hbase 0.90.0?  Take it for a spin.
>> Check out the doc., etc.  Vote +1/-1 by January 3rd, 2011.
>>
>> 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/
>>
>
>
>
> --
> Todd Lipcon
> Software Engineer, Cloudera
>

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