We are int he process of determining if we need a new san or not. A tool was provided to me by netapp to measure the performance of our disk system.
Currently we have an Dell EMC AX100.
The specifications state that it can do
30,000 I/Os and 150MB per second w/ 11 7200 rpm sata drives
OK, so I ran this tool from netapp. It produces some graphs that show
X1 = Disk reads Per Sec
X2 = Disk Read bytes Per Sec
Y = Time
Their graph shows it topping out at with random reads at
130.00 Disk Bytes Per Sec
1600000.00 Disk Read bytes per sec
With a average of
40 - 60 Disk Bytes Per Sec
500000 - 700000 Disk Read bytes per sec
Now I am aware that Dell's AX100 numbers are on paper and do not represent live numbers.
But I'm missing how 30,000 I/Os and 150MB per second corresponds to Disk ready bytes and Disk read per sec.
in closing we believe we're maxing out the disk performance of our san, but want to be clear on the numbers before I suggest a replacement.
Thanks in advance.