Another 2.4 upgrade horror story
Hagedorn at uni-koeln.de
Thu Sep 27 05:21:40 EDT 2012
--On 25. September 2012 14:28:03 +0200 Eric Luyten <Eric.Luyten at vub.ac.be>
> Thank you for sharing your experiences.
> As a site willing/needing to upgrade from 2.3.16 to 2.4.X this fall, we
> are interested in learning about your storage backend characteristics.
> What read/write IOPS rates were you registering before/during/after your
> upgrade process ?
> I'd understand your reluctance to share this information in a public
> forum. No offence taken whatsoever !
no problem, it just took me a while to gather the information. Our backends
are IBM DS4300s. Some of the disks are 73 GB 15k RPM Fibre Channel Disks
(RAID 5), others are 146 GB 10k RPM Fibre Channel Disks. The SAN
controllers are IBM SVCs (model 2145 8F4). The load is balanced (though not
evenly) over four disk controllers. According to our storage guy we see 600
IOps/s on average, with peaks up to 2,000-3,000 under normal circumstances.
During the migration we saw 10,000 IOps/s per controller, 40,000 in sum.
Hope this helps
.:.Sebastian Hagedorn - RZKR-W (Gebäude 133), Zimmer 2.02.:.
.:.Regionales Rechenzentrum (RRZK).:.
.:.Universität zu Köln / Cologne University - ✆ +49-221-470-89578.:.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 5313 bytes
Desc: not available
Url : http://lists.andrew.cmu.edu/pipermail/info-cyrus/attachments/20120927/42d5e8e8/attachment.bin
More information about the Info-cyrus