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From MilleBii <mille...@gmail.com>
Subject Re: Upgrading namenode/secondary node hardware
Date Thu, 16 Jun 2011 13:19:47 GMT
But if my Filesystem is up & running fine... do I have to worry at all or
will the copy (ftp transfer) of  hdfs will be enough.

2011/6/16 Steve Loughran <stevel@apache.org>

> On 15/06/11 15:54, MilleBii wrote:
>> Thx.
>> #1 don't understand the "edit logs" remark.
> well, that's something you need to work on as its the key to keeping your
> cluster working. The edit log is the journal of changes made to a namenode,
> which gets streamed to HDD and your secondary Namenode. After a NN restart,
> it has to replay all changes since the last checkpoint to get its directory
> structure up to date. Lose the edit log and you may as well reformat the
> disks.


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