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From Colin McCabe <cmcc...@alumni.cmu.edu>
Subject Re: same edits file is loaded more than once
Date Wed, 07 Nov 2012 19:14:41 GMT
Hi,

If you want to learn more about HA in HDFS, here are some slides from
a talk that Aaron T. Meyers and Suresh Srinivas gave:
http://www.slideshare.net/hortonworks/nn-ha-hadoop-worldfinal-10173419

branch-2 and later contain HDFS HA.

cheers,
Colin


On Sun, Nov 4, 2012 at 1:06 AM, lei liu <liulei412@gmail.com> wrote:
> I am using hadoop0.20.2, now I want to use HDFS HA function.  I research
> AvatarNode. I find if the StandbyNN do checkpoint fail, when next time the
> StandbyNN do checkpoint, the same edits file is loaded again.  Can same
> edits file be loaded more than once in hadoop0.20.2?
> if not, what is the harm?
>
> Thanks,
>
> LiuLei
>

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