Block Alignment on VMAX All Flash 250F
During performance test with IOmeter, on our VMAX 250F, with 1.5TB of cache, two V-Bricks and 40 SSD disks.
We expected to view 200K IOPS and RT<1ms(Requirements of our RFP). But, when I do the test, we don´t see these numbers.
Only 180K [MAX] IOPS with 1.3/1.4 avg IOPS not sustained.
I noticed a lot of GM consumed, (Topic for another time.) because we created some TDEV´s and I noticed some good variation when we change the Align IO, to 1MB and we saw 290K IOPS and 0.8ms RT sustained.
Changing Align IO/partition Alingment is a good choice for pushing performance and decrease RT?
Thanks in advance.