[lustre-discuss] OST partition sizes
andrew.wagner at ssec.wisc.edu
Wed Apr 29 06:14:45 PDT 2015
We've continued using the 128KB stripes to the disks. The performance
dropoff going from 8+2 128KB to 10+2 128KB was measurable but not a
game-changer for us, particularly as the filesystems that are using 10+2
are mixed-use rather than HPC scratch.
I'm not sure if we tested using larger stripe sizes on the 10+2 arrays
to see if performance got any better. Do you have any test results on
10+2 128KB vs 10+2 256KB?
Research Systems Administrator
Space Science and Engineering
University of Wisconsin
andrew.wagner at ssec.wisc.edu | 608-261-1360
On 04/28/2015 08:59 PM, Nguyen Viet Cuong wrote:
> We normally use 8+2 in RAID6 with 128KB chunk.
> Andrew, what is stripe size in case of your 10+2 config? Sometime I
> use 256KB to make it 2.5MB stripe because I think 1.25MB is unreasonable.
> On Wed, Apr 29, 2015 at 5:35 AM, Andrew Wagner
> <andrew.wagner at ssec.wisc.edu <mailto:andrew.wagner at ssec.wisc.edu>> wrote:
> We try to do 8+2 where it's convenient, but when we end up with 12
> disk raid arrays in some places we do 10+2.
> Andrew Wagner
> Research Systems Administrator
> Space Science and Engineering
> University of Wisconsin
> andrew.wagner at ssec.wisc.edu <mailto:andrew.wagner at ssec.wisc.edu> | 608-261-1360
> On 04/28/2015 03:01 PM, Andrus, Brian Contractor wrote:
>> Quick question/survey:
>> What is the partition size folks use for their OSTs and why?
>> Brian Andrus
>> ITACS/Research Computing
>> Naval Postgraduate School
>> Monterey, California
>> voice: 831-656-6238
>> lustre-discuss mailing list
>> lustre-discuss at lists.lustre.org <mailto:lustre-discuss at lists.lustre.org>
> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
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> Nguyen Viet Cuong
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