Adding HBAs for additional bandwidth

[gurdeep_2]

If I were to add additional HBAs to say, a SQL Server, would that give it more bandwidth to the EVA by connecting it to 2 different switches (its currently connected to 2 2/32 SAN switches).

[Steven Clementi]

You are still limited by the fact that the EVA only has 4 (or 8 on an eva8k) ports. If you had 4 virtual disks and you selected 1 primary hba for each virtual disk and presented that VD from the appropiate controller, then maybe you might see a little better performance, but you are still limited to that 2G pipe from the EVA (or 4GB if you have a newer one).

The limiting factor is still going to be how fast the server can transfer the data from it's internal bus, to the processor and back to the hba. If you have 4 hba's, you've just potentially saturated your internal bus(es) if you are doing heavy transactions.


Steven