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From bejoy.had...@gmail.com
Subject Re: hadoop namenode recovery
Date Tue, 15 Jan 2013 02:50:44 GMT
Hi Panshul,

Usually for reliability there will be multiple dfs.name.dir configured. Of which one would
be a remote location such as a nfs mount. 
So that even if the NN machine crashes on a whole you still have the fs image and edit log
 in nfs mount. This can be utilized for reconstructing the NN back again.

Bejoy KS

Sent from remote device, Please excuse typos

-----Original Message-----
From: Panshul Whisper <ouchwhisper@gmail.com>
Date: Mon, 14 Jan 2013 17:25:08 
To: <user@hadoop.apache.org>
Reply-To: user@hadoop.apache.org
Subject: hadoop namenode recovery


Is there a standard way to prevent the failure of Namenode crash in a
Hadoop cluster?
or what is the standard or best practice for overcoming the Single point
failure problem of Hadoop.

I am not ready to take chances on a production server with Hadoop 2.0 Alpha
release, which claims to have solved the problem. Are there any other
things I can do to either prevent the failure or recover from the failure
in a very short time.

Thanking You,

Ouch Whisper

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