Erik Forsberg 2010-12-16, 14:32
-Re: Unbalanced disks - need to take down whole HDFS?
Travis Crawford 2010-12-16, 14:44
On Dec 16, 2010, at 6:34 AM, Erik Forsberg <[EMAIL PROTECTED]> wrote:
> I have unbalanced disks on one of my nodes after a disk failure with
> disk replacements.
> has a solution, but it starts with "Take down HDFS".
> Is that really necessary - shouldn't taking down just that datanode,
> moving around the blocks, then start the datanode be good enough, or
> will that mess up some datastructure in the namenode?
You're right - that should say take the DataNode down, move blocks
around, then restart the DataNode. You might be able to just replace
the disk and have them unbalanced for a while though. As data is
created and deleted things will naturally even out.
> Erik Forsberg <[EMAIL PROTECTED]>
> Developer, Opera Software - http://www.opera.com/
Allen Wittenauer 2010-12-16, 19:33