Isilon: measuring IOPS for drive

Recommended max IOPS rates for Isilon drives are
100 for Sata drives
200 for SAS drives
Stech Mach8 SSD drives:2600
Hitachi SSD drive: 4800

measuring iops per drive
requires root access
isi statistics query --stats=node.disk.xfers.rate.<drive #>
isi statistics query --nodes=all --stats=node.disk.xfers.rate.sum   for all nodes

Measuring latency
isi statistics -nall --top --long

Disk latency
7200 RPM SATA = 8-10 ms
10000 RPM SAS = 3 ms

Infiniband latency: ~.050 milliseconds


Measuring CPU performance under load
isi statistics protocl
isi statistics protocol --orderby-TimeAvg --top
isi statistics system --top  to see greater details about cpu processing
Too see load averages
sysctl vm.loadavg
sysctl vm.uptime

To display performance information for all nodes by drive:
isi statistics drive --nodes=all --orderby=timeinqueue

isi statistics client --remote-name=<IP_address>