[Lustre-devel] F/S stats visualisation
adilger at whamcloud.com
Fri Apr 29 10:41:05 PDT 2011
On Apr 29, 2011, at 11:35, Nathan Rutman wrote:
> That's interesting - why do you think opens >> closes?
> Are we not tracking closes correctly?
I was wondering the same, and/or we are double-counting opens? Clients won't send close RPCs if they are evicted (MDS does the close locally on eviction), but I'd hope that clients aren't evicted _that_ often.
> On Apr 28, 2011, at 4:04 PM, Eric Barton wrote:
>> I've made some histograms that visualise the F/S stats people have
>> so kindly sent in. There are a couple of surprises which seem to
>> do with how the filesystems were set up (e.g. huge #s of inodes
>> reserved but not used on OSTs) and used (different ratios of ops).
>> The attached PDF has a summary for each filesystem containing...
>> * Filesystem name
>> * Ratio of MDS 1K blocks to MDS inodes
>> Ratio of OST 1K blocks to MDS inodes
>> Ratio of OST inodes to MDS inodes
>> * Histogram of operation counts
>> * Histogram of blocks total (blue) and used (red) on the MDS
>> and all OSTs
>> * Histogram of inodes total (blue) and used (red) on the MDS
>> and all OSTs
>> ...hope you find it useful.
>> <Lustre stats.pdf>_______________________________________________
>> Lustre-devel mailing list
>> Lustre-devel at lists.lustre.org
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