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From Ted Yu <yuzhih...@gmail.com>
Subject Re: ANN: hbase 0.90.0 Release Candidate 0 available for download
Date Mon, 15 Nov 2010 20:33:19 GMT
Just a few findings when I tried to compile our 0.20.6 based code with this
new release:

HConstants is final class now instead of interface
RowFilterInterface is gone
org.apache.hadoop.hbase.io.Cell is gone
org.apache.hadoop.hbase.io.RowResult is gone
is gone
Put.setTimeStamp() is gone
org.apache.hadoop.hbase.filter.Filter has added

If you know the alternative to some of the old classes, please share.

On Mon, Nov 15, 2010 at 2:51 AM, Stack <stack@duboce.net> wrote:

> The first hbase 0.90.0 release candidate is available for download:
>  http://people.apache.org/~stack/hbase-0.90.0-candidate-0/<http://people.apache.org/%7Estack/hbase-0.90.0-candidate-0/>
> 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.
> More than 920 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.   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. 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. See CHANGES.txt [3] in
> branch-0.20-append to see list of patches involved.
> 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 0.90.0RC0 will not work.
> Should we release this candidate as hbase 0.90.0?  Take it for a spin.
>  Check out the doc.  Vote +1/-1 by November 22nd.
> 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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