Hi All (but mostly Sven),
I stumbled across this great gem:
files.gpfsug.org/presentations/2014/UG10_GPFS_Performance_Session_v10.pdf
and I'm wondering which, if any, of those tuning parameters are still
relevant with the 4.2.3 code. Specifically for a CNFS cluster. I'm
exporting a gpfs fs as an NFS root to 1k nodes. The boot storm is
particularly ugly and the storage doesn't appear to be bottlenecked.
I see a lot of waiters like these:
Waiting 0.0009 sec since 20:41:31, monitored, thread 2881
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 26231
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 26146
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 18637
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 25013
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 27879
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 26553
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 25334
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
Waiting 0.0009 sec since 20:41:31, monitored, thread 25337
InodePrefetchWorkerThread: on ThCond 0x1800635A120 (LkObjCondvar),
reason 'waiting for LX lock'
and I'm wondering if there's anything immediate one would suggest to
help with that.
-Aaron
--
Aaron Knister
NASA Center for Climate Simulation (Code 606.2)
Goddard Space Flight Center
(301) 286-2776
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