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From Kay Kay <kaykay.uni...@gmail.com>
Subject Re: HBase trunk and Hadoop 0.21
Date Wed, 17 Feb 2010 20:07:56 GMT
On 2/17/10 11:42 AM, Jean-Daniel Cryans wrote:
> Hi devs,
> Yesterday Stack, Ryan, Todd (from cloudera) and me had a meeting with the FB
> team about the course of action we should take with regard to Hadoop 0.21.
> Since Y! doesn't seem committed to release it anytime soon (or even use it),
> most users will probably stick with Hadoop 0.20.
> What it means for us is no HDFS-265 until months and this is not a situation
> our users should/will tolerate. Dhruba agreed to work on HDFS-200 (and some
> others) to make sure we can have an equivalent support for sync (at least
> from the HBase point of view). This work is targeted at Hadoop 0.20 although
> it won't probably ever be in an Apache release.
> This means that the current HBase trunk should ideally support both
> 0.20+HDFS-200 and 0.21 at the same time. I opened HBASE-2233 for that. Todd
> was mentioning that if HDFS-200 isn't making the rest of Hadoop unstable,
> they could even package it in some sort of release of theirs and make our
> users' life easier. Could be a win-win.
> Should we still name the next major HBase release as 0.21? If it becomes
> common for HBase to support multiple Hadoop releases, should we still follow
> their version number?
It might be useful to start a separate minor version ( say, 0.7.x ) that 
depends on 0.20.x of hdfs (of hadoop), so that hbase has the flexibility 
to upgrade the minor numbers ( say, 0.8.x ) for any fundamental changes, 
while both of them can depend on 0.20.x .  I believe depending on the 
stability / evolution of the dependencies - 1.0 can present itself down 
the road, possibly sooner. At the moment - it is kind of hazy though.

> Could it be time for HBase 1.0 ?

> Let's hear everyone's opinion.
> J-D

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