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From Stas Oskin <stas.os...@gmail.com>
Subject NameNode resilency
Date Sat, 11 Apr 2009 09:43:47 GMT
Hi.

I wonder, what Hadoop community uses in order to make NameNode resilient to
failures?

I mean, what High-Availability measures are taken to keep the HDFS available
even in case of NameNode failure?

So far I read a possible solution using DRBD, and another one using carp.
Both of them had the downside of keeping a passive machine aside taking the
IP of the NameNode.

Perhaps there is a way to keep only a passive NameNode service on another
machine (which does other tasks), taking the IP only when the main has
failed?

That of course until the human operator restores the main node to action.\

Regards.

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