[lustre-discuss] Per-client I/O Operation Counters

[Russell Dekema]

Greetings,

Is there a way, either on the Lustre clients or (preferably) OSSes, to
determine how many I/O operations each Lustre client is performing
against the filesystem?

I know several ways of finding the number of *bytes* read or written
by a client (or even on a per-job basis with job_stats), but we
suspect we have some clients overwhelming our filesystem with large
numbers of small I/O requests, and I don't know how to find per-client
(or per-job) I/O operation counters.

This is a Lustre 2.5 system.

Sincerely,
Rusty Dekema
University of Michigan
Advanced Research Computing - Technical Services