[gpfsug-discuss] Change to default for verbsRdmaMinBytes?

[Edward Wahl]

Howdy.   Just noticed this change to min RDMA packet size and I don't seem to
see it in any patch notes.  Maybe I just skipped the one where this changed?

 mmlsconfig verbsRdmaMinBytes
verbsRdmaMinBytes 16384 

(in case someone thinks we changed it)

[root at proj-nsd01 ~]# mmlsconfig |grep verbs
verbsRdma enable
verbsRdma disable
verbsRdmasPerConnection 14
verbsRdmasPerNode 1024
verbsPorts mlx5_3/1
verbsPorts mlx4_0
verbsPorts mlx5_0
verbsPorts mlx5_0 mlx5_1
verbsPorts mlx4_1/1
verbsPorts mlx4_1/2


Oddly I also see this in config, though I've seen these kinds of things before.
mmdiag --config |grep verbsRdmaMinBytes
   verbsRdmaMinBytes 8192

We're on a recent efix. 
Current GPFS build: "4.2.2.3 efix21 (1028007)".

-- 

Ed Wahl
Ohio Supercomputer Center
614-292-9302