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From Viswanathan J <jayamviswanat...@gmail.com>
Subject Re: Hadoop upgrade
Date Fri, 23 Aug 2013 16:48:54 GMT
Thanks Harsh for your answers.

I asked that namenode layout version id doesn't conflict.

-Viswa.J
On Aug 23, 2013 10:12 PM, "Harsh J" <harsh@cloudera.com> wrote:

> Hi,
>
> On Fri, Aug 23, 2013 at 10:05 PM, Viswanathan J
> <jayamviswanathan@gmail.com> wrote:
> > Hi,
> >
> > We are planning to upgrade our production hdfs cluster from 1.0.4 to
> 1.2.1
> >
> > So if I directly upgrade the cluster, it won't affect the edits, fsimage
> and
> > checkpoints?
>
> Yes, an upgrade won't affect those.
>
> > Also after upgrade is it will read the blocks, files from the data nodes
> > properly?
>
> Yes.
>
> > Is the version id conflict occurs with NN?
>
> Not sure what you mean, but there shouldn't be a problem as long as
> all service nodes and client nodes are upgraded to the same version.
>
> > Do I need lose the data after upgrade?
>
> You won't lose data after an upgrade.
>
> --
> Harsh J
>

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