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From Yusup Ashrap <aph...@gmail.com>
Subject Re: Updating from 0.90.2 to 0.94
Date Tue, 26 Feb 2013 09:17:21 GMT
Hi Viral , thanks for reply.
Thing is that my table is kinda big. I have about one hour maximum downtime for this upgrade.
That is not enough to distcp 20TB data to another backup cluster, even I modify replication
factor to 1, 
and from my exp it's highly unlikely to succeed  for the first time with distcp.

thanks for the offer anyway. 

Best Regards
Yusup Ashrap

On Tuesday, February 26, 2013 at 4:51 PM, Viral Bajaria wrote:

> Well if you can afford a longer downtime, you can always distcp your
> existing hbase data. This way if things get screwed up you can always
> restore a 0.90.x on that old backup. You cannot distcp while the cluster is
> running since it will not be able to get locks on file (I think I faced
> that issue but not sure since I did this upgrade mid-2012).
> When I did an upgrade, I brought up a test 0.94 cluster using the distcp
> backup (I took like 2-3 copies since I was very paranoid). Once I ran all
> my production jobs against the test instance and I was happy with all the
> results, that's when I re-ran the script to do the migration. It was all
> scripted out but I no longer have access to those scripts or else I would
> have shared it with you.
> Thanks,
> Viral

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