Hi,
I'd like to monitor the IOPS on the Lustre OSTs.
I have stats like this:
[root@xxx04 ~]# lctl get_param obdfilter.xxx-OST.stats
obdfilter.xxx-OST.stats=
snapshot_time 348287.096066602 secs.nsecs
start_time0.0 secs.nsecs
elapsed_time
Yes, each RPC will increment these stats counters by one. Traditional "IOPS"
are measured with 4KB read or write, but in this case the IO sizes are variable.
Also, the client may aggregate multiple disjoint writes into a single RPC. This
can be seen in the osd-ldiskfs.*.brw_stats as "discontiguo