hi,
in the last month we have the following average Values of the 16 Disks (DFM Report) :
Read Ops/sec: 90
write Ops/sec: 4
Throughput Blocks/sec: 410
Busy (%): 30%
We don't have any intensive I/O VM's, but we'll buy a second shelf, too. After starting a the backup process (via NFS), it looks like this:
chip4> sysstat -c 10 -u 1
CPU Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk
ops/s in out read write read write age hit time ty util
13% 2069 10553 54047 54364 0 0 0 3s 89% 0% - 73%
15% 2153 11929 57947 59072 0 0 0 3s 90% 0% - 78%
30% 3717 55428 53787 54260 32 0 0 7s 89% 0% - 80%
14% 1958 8163 54683 54284 0 0 0 6s 92% 0% - 62%
10% 1748 4542 59106 56584 0 0 0 6s 92% 0% - 58%
20% 1120 2840 39477 57432 61508 0 0 2 98% 61% T 87%
18% 1367 4342 51629 52008 57672 0 0 2 98% 100% : 77%
14% 1686 6793 57079 55528 29748 0 0 2 92% 64% : 73%
10% 1390 2445 45892 44252 24 0 0 2 91% 0% - 60%
9% 1522 3233 57545 54080 0 0 0 2 92% 0% - 52%
chip4> sysstat -c 10 1
CPU NFS CIFS HTTP Net kB/s Disk kB/s Tape kB/s Cache
in out read write read write age
11% 2296 0 0 2973 76892 54128 32 0 0 6s
18% 4346 0 0 4197 71055 77452 0 0 0 6s
15% 4373 0 0 2398 77533 65772 0 0 0 6s
20% 2104 0 0 2507 46679 47012 35220 0 0 4
12% 2464 0 0 2348 57280 46576 20636 0 0 4
11% 2699 0 0 3298 60688 43872 8 0 0 4
11% 2317 0 0 3760 55468 48212 24 0 0 4
13% 2940 0 0 3645 66395 50112 0 0 0 6s
12% 3124 0 0 2774 70399 46052 0 0 0 6s
11% 2602 0 0 2888 60654 37088 24 0 0 6s
greets
Steffen
Von: Sto RageC [mailto:netbacker@gmail.com] Gesendet: Mittwoch, 26. September 2012 01:34 An: Steffen Knauf Cc: toasters@teaparty.net Betreff: Re: Raidgroupsize and I/O Performance
Take a look at http://media.netapp.com/documents/tr-3801.pdf first before you add the PAM card to see if it will make a difference in your environment.
On Tue, Sep 25, 2012 at 1:19 AM, Steffen Knauf sknauf@chipxonio.de wrote:
Hello,
i'll try to improve our I/0 Perfomance. We have a raidgroup with 16 disks (SAS), 1 aggregate and 1 volume (dedup enabled). The volume is the storage for 100 VM's on the VMware Cluser (access via NFS). Does it make sense to increase the raidgroup? 90% Percent of the Disk I/O are Read Ops, so i'll buy a PAM Card for our FAS3240,too.
And what's your Experience with the Raidgroupsize of a Raidgroup with SATA Disks (now: 11+1)?
Thanks and greets !
Steffen
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