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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