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 <duanhon...@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
