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From Jianhui Zhang <jhzhang.em...@gmail.com>
Subject Re: Can I switch the IP/host of NN without losing the filesystem?
Date Mon, 07 Jan 2013 22:30:25 GMT
Thank everybody for the responses.

James

On Mon, Jan 7, 2013 at 12:49 PM, Robert Molina <rmolina@hortonworks.com>wrote:

> Hi James,
> This should be fine, but just wanted to add that you will need to also
> make the change on your other nodes within the cluster, so they know how to
> contact the filesystem.
>
> Regards,
> Robert
>
>
> On Sun, Jan 6, 2013 at 12:18 AM, Jagat Singh <jagatsingh@gmail.com> wrote:
>
>> Yes your data is safe.
>>
>>
>>
>>
>> On Sun, Jan 6, 2013 at 6:41 PM, Jianhui Zhang <jhzhang.email@gmail.com>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
>>>
>>
>>
>

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