|To:||Dave Chinner <david@xxxxxxxxxxxxx>|
|Subject:||Re: definitions for /proc/fs/xfs/stat|
|From:||Mark Seger <mjseger@xxxxxxxxx>|
|Date:||Tue, 18 Jun 2013 06:17:36 -0400|
|Cc:||Stefan Ring <stefanrin@xxxxxxxxx>, Nathan Scott <nathans@xxxxxxxxxx>, Linux fs XFS <xfs@xxxxxxxxxxx>|
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mark - good point about the controller cache and the 1-bye/block, but remember my files in this case are only 1 block.
dave - a long time ago I found/reported a bug in the way linux was doing their block stats. They were basically incrementing the byte counts as block were written to cache and the reported numbers were ridiculously high. I had wondered if something like this could be going on, but also remember the numbers being reported by xfs are much too high. I did 10K 1K writes, which I do understand are really 1-4k page each, but that's still only 40MB. If I add up all the 500MB/sec bytes xfs logging is reporting (even one of which is over 10 times larger), I see something on the order of of 10GB. But again this IS with the older kernel and so may not be worth worrying about.
On Mon, Jun 17, 2013 at 8:15 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
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