There is no real reason that I see to reduce the number of Lustre
processes. It won't cause any ill effects on other processes running.
Lustre is heavily multi threaded hence the large number of lustre procs.
Sridharan Ramaswamy (srramasw) wrote:
Hi Andreas,
I didn't see any reply earlier. Can you please comment on this
question on number of Lustre processes?
- Sridharan
------------------------------------------------------------------------
*From:* [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] *On Behalf Of
*Sridharan Ramaswamy (srramasw)
*Sent:* Tuesday, January 23, 2007 10:39 AM
*To:* [email protected]
*Subject:* [Lustre-discuss] Number of processes in Lustre tunable?
I'm tring to measure the overhead of having Lustre on the
system. Among other things, I noticed it starts lot of processes,
root 4565 1 0 Jan03 ? 00:00:00 [ll_mdt_attr_14]
root 4636 1 0 Jan03 ? 00:00:01 [ll_ost_13]
root 4651 1 0 Jan03 ? 00:00:08 [ll_ost_io_13]
root 4550 1 0 Jan03 ? 00:00:03 [ll_mdt_14]
root 4516 1 0 Jan03 ? 00:00:00 [ldlm_cb_31]
I can account about 200 processes related to Lustre on an OST
node. That seems a lot considering we would like to run other
applications on the same node. Is it possible to tune these number
of processes down? Say reduce 32 ldlm process to about 8. What
kind of performance degradation to expect if we can do that?
thanks,
Sridharan
------------------------------------------------------------------------
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