Hi,
Lustre operation manual says that recommended values for lru_size
parameter are in neighborhood of 1000 per osc and 2500 per mdc on
interactively used client node.
Also it states.
Increasing this on a large number of client nodes is not recommended
(this parameter controls locks cached on the client), though servers
have been tested with up to 150,000 total locks (num_clients *
lru_size).
My question is why not bigger values? What determines the max lru_size.
I would like to be able to determine what is the biggest number of
lru_size I can set on a fixed number of interactive clients (login
nodes) with fixed number of osc's and mdc's.
I found this thread where Oleg Drokin suggests to set lru_size to
41000 (this is an old thread though). So it is significantly bigger
value then one recommended in the manual.
http://lists.lustre.org/pipermail/lustre-discuss/2005-December/001040.html
Thank You,
Wojciech Turek
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