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From Stephen Fritz <steph...@cloudera.com>
Subject Re: Replacing a hard drive on a slave
Date Wed, 28 Nov 2012 14:51:25 GMT
HDFS will not start re-replicating blocks from a dead DN for 10 minutes 30
seconds by default.

Right now there isn't a good way to replace a disk out from under a running
datanode, so the best way is:
- Stop the DN
- Replace the disk
- Restart the DN

On Wed, Nov 28, 2012 at 9:14 AM, Mark Kerzner <mark.kerzner@shmsoft.com>wrote:

> Hi,
> can I remove one hard drive from a slave but tell Hadoop not to replicate
> missing blocks for a few minutes, because I will return it back? Or will
> this not work at all, and will Hadoop continue replicating, since I removed
> blocks, even for a short time?
> Thank you. Sincerely,
> Mark

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