How do I measure IOPS of a running Linux server? I know that the theoretical IOPS of a SATA drive is around 90 and enterprise 10k SAS/FC disk is 180. I want to know how much my running system is using currently?
Currently I am using iotop and iostat. But both utilities do not give the IOPS number.
btw, this question is not a duplicate of this. I am not looking for benchmarking my storage system, but figure out how much IOPS is being used by my current system.
Uhm... iostat on my system shows the IOPS:
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 1.00 64.00 0.00 64 0
Might want to look at upgrading.
Install sysstat package if you don't have it already and then use command sar -d 1. Watch the tps column. It gives you at least the ballpark figure.
But remember that actual maximum number of IOPS varies heavily depending on your server workload. A server with lots of sequential access might get more IOPS than a one doing lots of random access.
Look at nmon as an option for a nicer presentation of the same data.
