This is something I've been battling over for some time now. We've really been pushing ESX / Hyper-V clusters as of late which obviuslly rey on shared storage. We've been using HP's MSA line of SAN's as we don't deal with massive companies.
My question shouldn't be to SAN specific though. There is always a lot of talk on the ideal vdisk/lun layout for a SAN. There is one scenario I've never worked out which way was better for performance.
SAN is going to host VMFS/CSV and also Exchange DB.
I can either do
Scenario 1.
16 X 146 GB SAS in Raid 10 for my VMFS/CSV w/ 2 X 146 GB SAS in Raid 1 for Exchange (I know that's not ideal for Exchange but for the sake of this example go with it).
Or
Scenario 2.
18 X 146 GB SAS in Raid 10 for everything with different volumes.
My thoughts are in Scenario 1 Exchange only has the performance of 2 drives (well 1). In scenario 2 Exchange can pull performance from all 18 and the VMFS also gains a few more IOPS from the additional spindles.
Keep in mind these are 100 user max clients.
Again. This could be anything, file storage, sql whatever. Not just exchange. Just used Exchange for the sake of the example. What are people's opinions. Bunch of smaller vdisks or 1 large vdisk with different volumes/luns? In my head the 1 big vdisk offers better performance.
My question shouldn't be to SAN specific though. There is always a lot of talk on the ideal vdisk/lun layout for a SAN. There is one scenario I've never worked out which way was better for performance.
SAN is going to host VMFS/CSV and also Exchange DB.
I can either do
Scenario 1.
16 X 146 GB SAS in Raid 10 for my VMFS/CSV w/ 2 X 146 GB SAS in Raid 1 for Exchange (I know that's not ideal for Exchange but for the sake of this example go with it).
Or
Scenario 2.
18 X 146 GB SAS in Raid 10 for everything with different volumes.
My thoughts are in Scenario 1 Exchange only has the performance of 2 drives (well 1). In scenario 2 Exchange can pull performance from all 18 and the VMFS also gains a few more IOPS from the additional spindles.
Keep in mind these are 100 user max clients.
Again. This could be anything, file storage, sql whatever. Not just exchange. Just used Exchange for the sake of the example. What are people's opinions. Bunch of smaller vdisks or 1 large vdisk with different volumes/luns? In my head the 1 big vdisk offers better performance.