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From Harsh J <ha...@cloudera.com>
Subject Re: upgrade from primary + secondary NN to active + standby NN
Date Wed, 22 May 2013 04:55:18 GMT
FWIW, I've seen through a lot of upgrades from 1.x to 2.x and metadata
issue's never been a part of it. You should be able to safely upgrade and
then to configure HA. Note that you cannot directly upgrade into HA mode
yet, you have to upgrade to a regular 1.x to 2.x, and then as a next step,
enable HA.

Rollbacks are supported as long as you haven't finalized the metadata
upgrade. I hope this covers the "backward capable" metadata question. If
not, please rephrase that point?

On Wed, May 22, 2013 at 5:49 AM, Serge Blazhievsky <hadoop.ca@gmail.com>wrote:

> Hi guys,
> I am planning to upgrade to HA architecture and I am not sure if metadata
> is backward capable.
> Are there any problems that anybody is aware of?
> Thanks in advance.
> Serge

Harsh J

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