Hi ,

I am working on redesigning virtual environment made of VMAX and VMware and would appreciate getting clarifications on following :

- In VMAX: Does LUN potential MAX IOPS changes with LUN size ?

Case in point : Comparing performance (IOPS/Latency) of  1 x 2 TB LUN vs. 2 x 1 TB LUNs assuming both have same number of metas , same allocation on each tier.

How same scenario plays out in case of VNX with pool made of 3 teirs.

- In VMAX: Does LUN potential IOPS change with number of metas in LUN?  Example: Which LUN will give best performance given 1920 GB LUN ( 8 metas x 240GB) vs (16 metas x 120GB) vs (32 metas x 60 GB).

- Does VMAX perform better with less number of FAST policies ?

Background:

I have 3 policies (GOOD (100% SATA,10% Fiber) , BETTER (100% SATA,100% Fiber, 1% SSD) , BEST (100% SATA,100% Fiber, 100% SSD) . I am having performance issues due to storage groups under Fast Policy "GOOD" being trapped in SATA tier, and heating it up. I am thinking about eliminating the GOOD policy and keep only The BETTER and BEST policies with most of my SG are on BETTER, and only high performing servers (Oracle RAC) on BEST policy .

Any feed is much appreciated.

Thanks