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From Azuryy Yu <azury...@gmail.com>
Subject Re: hadoop 2.4 using Protobuf - How does downgrade back to 2.3 works ?
Date Fri, 17 Oct 2014 09:48:50 GMT
just stop your cluster, then start your HDFS with '-rollback'. but it's
only if you don't finalize HDFS upgrade using command line.

On Fri, Oct 17, 2014 at 8:15 AM, Manoj Samel <manojsameltech@gmail.com>
wrote:

> Hadoop 2.4.0 mentions that FSImage is stored using protobuf. So upgrade
> from 2.3.0 to 2.4 would work since 2.4 can read old (2.3) binary format and
> write the new 2.4 protobuf format.
>
> After using 2.4, if there is a need to downgrade back to 2.3, how would
> that work ?
>
> Thanks,
>

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