[lustre-discuss] More issues with cur_grant_bytes

Ms. Megan Larko dobsonunit at gmail.com
Tue Dec 8 16:39:23 PST 2020

Greetings K Hildebrand!
Running Lustre 2.12.5 on the clients I have observed the same behavior.  On
some OSTs, the osc.*.cur_grants_bytes drop to the mid-3000's!  That is
lower than the 700000 numbers displayed in the posts of others on this
list.   Concurrently, the same OSTs displaying the low cur_grants_bytes low
numbers displayed non-zero numbers in num_dirty_bytes (I think that is
the param; not at my desk.  It is in the same dir as cur_grant_bytes)    I
did issue "lctl set_param osc.*.grant_shrink=0" on the clients.  The only
effect I observed from this setting is that the osc.*.num_dirty_bytes were
now always zero, but the cur_grant_bytes numbers were still decreasing
although the decrease was much less than without the osc.*.grant_shrink=0

Any additional guidance is greatly appreciated.
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