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From Harsh J <ha...@cloudera.com>
Subject Re: How to restore HDFS data
Date Thu, 02 May 2013 13:19:51 GMT
If you've already run -delete (-move is a better choice if you know DN
fault is temporary), then the missing blocks are already deleted from the
namespace permanently. No way to recover the data since the blocks have
also been invalidated by now.

A HDFS Snapshots feature will arrive in near future to cover the backup
scenarios that may prove useful in cases such as this.

On Thu, May 2, 2013 at 6:23 PM, 段洪义 <duanhongyi@doopai.com> wrote:

> Datanode error, and then I run hadoop fsck /-delete.Lost a lot of data,
> Later, these datanode recovery, Is there any way to restore the fsck
> command to delete the data.

Harsh J

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