FAQ
OK. Vote passes. Let me put up RC3 as 0.90.0. Be warned that the
website will change at same time from old forrest generated version to
maven generated.
Thanks all who tested and voted,
St.Ack
On Wed, Jan 19, 2011 at 2:19 AM, Andrew Purtell wrote:
+1!

Best regards,

- Andy

Problems worthy of attack prove their worth by hitting back.
- Piet Hein (via Tom White)


--- On Tue, 1/18/11, Gary Helmling wrote:
From: Gary Helmling <ghelmling@gmail.com>
Subject: Re: ANN: The fourth hbase 0.90.0 release candidate is available for download X
To: dev@hbase.apache.org
Date: Tuesday, January 18, 2011, 5:20 PM [...]
+1 on release.

--gh

On Tue, Jan 18, 2011 at 11:24 AM, Jean-Daniel Cryans wrote:

+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:
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

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