|Subject:||Re: U320 Large Array Performance|
|From:||"Rick Smith" <rgsmith72@xxxxxxxxxxx>|
|Date:||Wed, 05 Feb 2003 12:33:40 -0800|
Steve,After examining the output of the xfs_bmap that I sent you it looks like each file has a different allocation group for the 15 disk case. With 14 disks (73GB each) there are 240 allocation groups when I build the filesystem and I get 257 allocation groups when I use 15 disks. Could there be an issue when exceeding 256 allocation groups that affects the mapping of files to allocation groups?
From: Steve Lord <lord@xxxxxxx> To: Rick Smith <rgsmith72@xxxxxxxxxxx> CC: linux-xfs@xxxxxxxxxxx Subject: Re: U320 Large Array Performance Date: 05 Feb 2003 12:02:08 -0600 On Tue, 2003-02-04 at 16:47, Rick Smith wrote: > Steve,> Here is the output from xfs_info, please excuse the formatting. I am using > a chunk size of 4K in the raid. Larger sizes seem to degrade performance.> Thanks for your help. > Can you do one more thing for me, with these configurations send me the xfs_bmap -v output for a file on each filesystem. Thanks, Steve -- Steve Lord voice: +1-651-683-3511 Principal Engineer, Filesystem Software email: lord@xxxxxxx
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