Now that my LUN's are thick provisioned, I wanted to test the performance again.
Because there is no more storage left in the pool, I couldn't create a new LUN to connect to my virtual machine as a RDM. So I ended up creating new hard disk for my virtual machine on the datastores that I wanted to test.
I created two hard disks, each 5GB thick provision eager zeroed. One on iSCSISPA_RAID5 and one on iSCSISPA_RAID10. I ran the same tests but the results were quite different.
iSCSISPA_RAID5:
* HD_Speed: avarage 100MB throughput
* IOMETER (Max throughput):
transfer request size to 64K, percent read/write distribution to 100% read, percent random/sequential distribution to 100% sequential
Total IOPS: 1019
Total MB/s: 66
Average IO Response: 0.9 ms
Max IO Response: 395 ms
* IOMETER (Max IOPS):
transfer request size to 512bytes, percent read/write distribution to 100% read, percent random/sequential distribution to 100% sequential
Total IOPS: 3288
Total MB/s: 1.6
Average IO Response: 0.3 ms
Max IO Response: 110 ms
iSCSISPA_RAID10:
* HD_Speed: avarage 60MB throughput
* IOMETER (Max throughput):
transfer request size to 64K, percent read/write distribution to 100% read, percent random/sequential distribution to 100% sequential
Total IOPS: 849
Total MB/s: 55
Average IO Response: 1.17 ms
Max IO Response: 383 ms
* IOMETER (Max IOPS):
transfer request size to 512bytes, percent read/write distribution to 100% read, percent random/sequential distribution to 100% sequential
Total IOPS: 3416
Total MB/s: 1.75
Average IO Response: 0.29 ms
Max IO Response: 125 ms
It seems that now I only have half the performance I had using thin provisioning.
Grtz
Filip