[Lustre-discuss] Removing an OST

Kevin Van Maren Kevin.Vanmaren at Sun.COM
Tue Jan 20 05:10:23 PST 2009

You have to copy the file to a new name _on Lustre_ to allocate a new  
inode (new storage) on Lustre, and then "mv" it to replace the  
original file.

Mv across filesystems is basically a cp, which will overwrite the  
destination file, not replace the inode.


On Jan 20, 2009, at 3:55 AM, Heiko Schroeter <schroete at iup.physik.uni-bremen.de 
 > wrote:

> Hm, i do got it that one has to 'move' the file back. But ...
>>> Copy the data on a client to a temp storage outside (does it has  
>>> to be
>>> outside?) the lustre system and 'move' them back into lustre to  
>>> create
>>> new inodes entries on the MDS.
>> Actually, it should NOT be on storage outside Lustre in this case.
> why staying inside lustre (in this case) ? (Bandwidth ?,  
> Performance ?...)
> What would be a different case/scenario that one has to go 'out' of  
> lustre ?
> Thanks and Regards
> Heiko
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