[gpfsug-discuss] mmpmon gfis fields question

[Aaron Knister]

Ah, thank you! That's a huge help. My preference, of course, would be to 
use documented calls but I'm already down that rabbit hole calling 
nsd_ds directly b/c the snmp agent chokes and dies a horrible death with 
3.5k nodes and the number of NSDs we have.

On 7/7/16 10:16 PM, Sven Oehme wrote:
> Hi,
>
> this is a undocumented mmpmon call, so you are on your own, but here is
> the correct description :
>
>
> _n_
>
> 	
>
> IP address of the node responding. This is the address by which GPFS
> knows the node.
>
> _nn_
>
> 	
>
> The name by which GPFS knows the node.
>
> _rc_
>
> 	
>
> The reason/error code. In this case, the reply value is 0 (OK).
>
> _t_
>
> 	
>
> Current time of day in seconds (absolute seconds since Epoch (1970)).
>
> _tu_
>
> 	
>
> Microseconds part of the current time of day.
>
> _cl_
>
> 	
>
> The name of the cluster that owns the file system.
>
> _fs_
>
> 	
>
> The name of the file system for which data are being presented.
>
> _d_
>
> 	
>
> The number of disks in the file system.
>
> _br_
>
> 	
>
> Total number of bytes read from disk (not counting those read from cache.)
>
> _bw_
>
> 	
>
> Total number of bytes written, to both disk and cache.
>
> _c_
>
> 	
>
> The total number of read operations supplied from cache.
>
> _r_
>
> 	
>
> The total number of read operations supplied from disk.
>
> _w_
>
> 	
>
> The total number of write operations, to both disk and cache.
>
> _oc_
>
> 	
>
> Count of open() call requests serviced by GPFS.
>
> _cc_
>
> 	
>
> Number of close() call requests serviced by GPFS.
>
> _rdc_
>
> 	
>
> Number of application read requests serviced by GPFS.
>
> _wc_
>
> 	
>
> Number of application write requests serviced by GPFS.
>
> _dir_
>
> 	
>
> Number of readdir() call requests serviced by GPFS.
>
> _iu_
>
> 	
>
> Number of inode updates to disk.
>
> _irc_
>
> 	
>
> Number of inode reads.
>
> _idc_
>
> 	
>
> Number of inode deletions.
>
> _icc_
>
> 	
>
> Number of inode creations.
>
> _bc_
>
> 	
>
> Number of bytes read from the cache.
>
> _sch_
>
> 	
>
> Number of stat cache hits.
>
> _scm_
>
> 	
>
> Number of stat cache misses.
>
>
> On Thu, Jul 7, 2016 at 7:09 PM, Aaron Knister <aaron.s.knister at nasa.gov
> <mailto:aaron.s.knister at nasa.gov>> wrote:
>
>     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 <tel:%28301%29%20286-2776>
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>
>
>
>
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-- 
Aaron Knister
NASA Center for Climate Simulation (Code 606.2)
Goddard Space Flight Center
(301) 286-2776