|To:||Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>|
|Subject:||Re: Improving XFS file system inode performance|
|From:||Jesse Stroik <jstroik@xxxxxxxxxxxxx>|
|Date:||Mon, 22 Nov 2010 16:32:06 -0600|
|Cc:||Linux XFS <xfs@xxxxxxxxxxx>|
|User-agent:||Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:220.127.116.11) Gecko/20101027 Lightning/1.0b2 Thunderbird/3.1.6|
On 11/22/2010 04:25 PM, Emmanuel Florac wrote:
Le Mon, 22 Nov 2010 15:59:51 -0600 vous écriviez:Performance was fine before the file system was filled -- last week ~8TB showed up and filled the 20TB file system. Since, it has been performing poorly.Maybe it got fragmented? How does fragmentation look like?
I wasn't able to resolve this in reasonable time. Part of the issue is that we're dealing with files within about 100k directories. I'll attempt to get the fragmentation numbers overnight.
I suspect the regularly listed set of files on this fs exceeds the inode cache. Where can I determine the cache misses and tune the file system?
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