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From kiran <kiran.sarvabho...@gmail.com>
Subject Re: Updating from 0.90.2 to 0.94
Date Tue, 26 Feb 2013 07:53:13 GMT

We also upgraded the version very recently. If you can afford couple of
minutes downtime then you can safely bring down the cluster and do upgrade.
As such, there will be no data loss, but be careful with splits. The
default split policy has been changed in this version if I am not wrong. It
causes some weird things.


On Tue, Feb 26, 2013 at 1:03 PM, Yusup Ashrap <aphawk@gmail.com> wrote:

> hi all,
> I am updating production cluster from 0.90.2 to 0.94 .  My table's size is
> about 20TB+ .
> Scheduled update includes upgrading both hbase,hadoop version,
>  and I am also changing user with which I  start up both hadoop and hbase
> cluster  from user "A" to user "B".
> It's production environment , so I wanted know what steps I should not
> miss regarding this upgrade.
> Table is kinda big and I don't have backup cluster to backup my data.
> I wanted to know will there be a data loss scenario if I rollback after
> having failed to upgrade. thanks.
> --
> Best Regards
> Yusup Ashrap

Thank you
Kiran Sarvabhotla

-----Even a correct decision is wrong when it is taken late

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