[Lustre-discuss] high CPU usage on MDS

[Ekaterina Popova]

Hello!

We've got one MDS (Lustre 2.0) with 4 processors (Intel(R) Core(TM)2 
Quad CPU    Q9500  @ 2.83GHz).
Our CPU usage is HIGH - 80-100% .
With top command we see:
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
2973 root      15   0     0    0    0 R 35.0  0.0   1509:09 socknal_sd02
  2972 root      15   0     0    0    0 S 33.5  0.0   1132:13 socknal_sd01
  2971 root      15   0     0    0    0 S 19.8  0.0   1129:12 socknal_sd00
  2974 root      16   0     0    0    0 R 13.7  0.0 830:47.46 socknal_sd03

Is it normal situation? Can we improve performance at mds ? Maybe 
setting any parameters?
(Only about 70 clients mount to Lustre and not all of them work with it.)

With regards,
Popova Ekaterina