It ssems that we have a alignment problem, too:
nfsstat:
Misaligned Read request stats
BIN-0 BIN-1 BIN-2 BIN-3 BIN-4 BIN-5 BIN-6 BIN-7
1096332359 1984142147 16821356 3951254 469217191 6145276 94494489 245873608
Misaligned Write request stats
BIN-0 BIN-1 BIN-2 BIN-3 BIN-4 BIN-5 BIN-6 BIN-7
252471989 1287671452 52026962 32535853 278299197 40175418 38565555 692647941
I'll do a reallocate measurement tomorrow.
greets
Steffen
If you're considering getting a cache adapter I'd hold off on messing with the RAID config until afterwards - tuning for writes is different than tuning for IO in general since you're looking for free space and generally the more contiguous the better.
Have you done a reallocate measurement, are your VMDK files all aligned?
On 09/25/2012 04:19 AM, Steffen Knauf 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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