We already have this specified. This specific /dev/sdn device is just receiving half the load compared to others across all our caches.
On Sun, Mar 27, 2016 at 2:01 PM, Schmerge, John (Contractor) < [email protected]> wrote: > Hi Steve, > > > Try adding a "volume=X" to each line of your storage.config. There's an > old issue with ATS when you have a single volume and replace a drive, in > which it (silently) does not use it because because it cannot figure out > which volume the drive belongs to. Explicitly assigning the volume in > storage.config sidesteps this condition. > > > -John > > > ------------------------------ > *From:* Steve Malenfant <[email protected]> > *Sent:* Saturday, March 26, 2016 10:29 PM > *To:* [email protected] > *Subject:* ATS Disk load distribution > > Hi, > > Our servers have 24 cache disks. On each of them, I'm seing an unusual > pattern where the 14th cache disk (/dev/sdn here) has half the tps and > Blk_read of the others while running a simple iostat. > > The OS drive is /dev/sdy. > > Is there something obvious that could explain this? Anybody else seeing > similar behaviors? > > Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn > sdy 8.50 0.59 412.30 1182292 826749224 > sdb 17.96 5574.30 763.26 11177773390 1530520872 > sda 17.27 5427.78 753.80 10883976079 1511537961 > sdc 16.76 5426.23 752.01 10880866108 1507966007 > sdf 17.40 5415.19 754.99 10858730317 1513930486 > sdd 17.42 5415.10 750.04 10858548347 1504011560 > sdg 17.43 5482.40 757.33 10993500408 1518615277 > sde 16.49 5265.87 740.41 10559295722 1484695034 > sdh 17.38 5492.09 758.66 11012923059 1521284992 > sdj 18.73 5849.73 787.82 11730078650 1579772953 > sdk 16.85 5319.37 742.29 10666574619 1488471133 > sdl 17.53 5608.22 766.14 11245803256 1536281866 > sdn 8.58 2555.06 517.71 5123501157 1038125596 > sdm 17.69 5525.47 757.92 11079862986 1519798735 > sdo 15.75 5039.02 726.77 10104411633 1457343705 > sdi 18.33 5684.66 782.37 11399081848 1568839983 > sdq 17.49 5596.34 760.76 11221981240 1525498204 > sdp 16.31 5143.23 734.07 10313388901 1471978836 > sdr 16.96 5393.52 755.80 10815269418 1515562524 > sdt 16.47 5293.78 740.87 10615265266 1485622464 > sds 15.99 5201.40 732.21 10430031258 1468246477 > sdv 17.92 5684.24 779.27 11398240262 1562614587 > sdu 17.26 5504.14 760.25 11037086102 1524475490 > sdx 17.74 5580.22 762.95 11189655745 1529890237 > sdw 17.17 5308.27 744.56 10644334189 1493013627 > > Steve >
