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From stack <st...@duboce.net>
Subject Re: thinking about hbase 0.20
Date Thu, 02 Apr 2009 07:15:39 GMT
I made HBASE-1215 as issue to cover migration from 0.19.x to 0.20.0.

We have a migration 'system' already.  You run ./bin/hbase migrate. Going
from 0.19.0 to 0.20.0, we'll need to add a mapreduce job that rewrites all
hbase data to new format.  It needs to be MR for those cases where data is

I thought at first that we could do lazy migration but after looking at it,
keeping up two key types in the one context looked too complex.


On Thu, Apr 2, 2009 at 8:51 AM, Ryan Rawson <ryanobjc@gmail.com> wrote:

> hi all,
> it's been a long road, but it's time to start thinking about what will
> conclusively be in 0.20.
> I'll let you fight that out a bit... personally I'd be happy with hfile +
> KeyValue.
> But, one last thing, what is our migration story going to be?
> -ryan

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