hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: ANN: hbase 0.90.0 Release Candidate 0 available for download
Date Mon, 15 Nov 2010 21:23:16 GMT
I think it's worth going at greater lengths to document that kind of
"breakage", maybe a page in the book? Stuff like "What's new" and
"Incompatibilities" that we can easily link to.

J-D

On Mon, Nov 15, 2010 at 12:38 PM, Ryan Rawson <ryanobjc@gmail.com> wrote:
> That is correct, those classes were deprecated in 0.20, and now gone in 0.90.
>
> Now you will want to use HTable and Result.
>
> Also Filter.getNextKeyHint() is an implementation detail, have a look
> at the other filters to get a sense of what it does.
>
> On Mon, Nov 15, 2010 at 12:33 PM, Ted Yu <yuzhihong@gmail.com> wrote:
>> 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
>> constructor
>> HColumnDescriptor(byte[],int,java.lang.String,boolean,boolean,int,boolean)
>> is gone
>> Put.setTimeStamp() is gone
>> org.apache.hadoop.hbase.filter.Filter has added
>> getNextKeyHint(org.apache.hadoop.hbase.KeyValue)
>>
>> 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/
>>>
>>
>

Mime
View raw message