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Hadoop, mail # user - Re: Can I switch the IP/host of NN without losing the filesystem?


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Re: Can I switch the IP/host of NN without losing the filesystem?
Jagat Singh 2013-01-06, 08:18
Yes your data is safe.

On Sun, Jan 6, 2013 at 6:41 PM, Jianhui Zhang <[EMAIL PROTECTED]>wrote:

> Hadoop version: hadoop-0.20.205.0
>
> My NN machine has 2 IP addresses and 2 hostnames assigned to them
> respectively. I have configured "fs.default.name" using one of the
> hostnames and used the cluster for a while.
>
> Now, I may have to move the "fs.default.name" to the other IP/hostname of
> the same machine. If no other configurations change (such as the
> directories), can I simply change "fs.default.name" to the new hostname,
> restart the NN and expect the same filesystem is intact?
>
> Thanks,
> James
>