[gpfsug-discuss] mmpmon gfis fields question

Aaron Knister aaron.s.knister at nasa.gov
Fri Jul 8 03:09:30 BST 2016


Does anyone know what the fields in the mmpmon gfis output indicate?

# socat /var/mmfs/mmpmon/mmpmonSocket -
_event_ newconnection _t_ 1467937547 _tu_ 372882 _n_ 10.101.11.1 _node_ 
local_node
mmpmon gfis
_response_ begin mmpmon gfis
_mmpmon::gfis_ _n_ 10.101.11.1 _nn_ lorej001 _rc_ 0 _t_ 1467937550 _tu_ 
518265 _cl_ disguise-gpfs _fs_ thome _d_ 5 _br_ 0 _bw_ 0 _c_ 0 _r_ 0 _w_ 
0 _oc_ 0 _cc_ 0 _rdc_ 0 _wc_ 0 _dir_ 0 _iu_ 0 _irc_


Here's my best guess:

_d_ number of disks in the filesystem
_br_ bytes read from disk
_bw_ bytes written to disk
_c_ cache ops
_r_ read ops
_w_ write ops
_oc_ open() calls
_cc_ close() calls
_rdc_ read() calls
_wc_ write() calls
_dir_ readdir calls
_iu_ inode update count
_irc_ inode read count
_idc_ inode delete count
_icc_ inode create count
_bc_ bytes read from cache
_sch_ stat cache hits
_scm_ stat cache misses

This is all because the mmpmon fs_io_s command doesn't give me a way 
that I can find to distinguish block/stat cache hits from cache misses 
which makes it harder to pinpoint misbehaving applications on the system.

-Aaron

-- 
Aaron Knister
NASA Center for Climate Simulation (Code 606.2)
Goddard Space Flight Center
(301) 286-2776



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