Looky here :)
A new command to perform system level stress test sneaked into ONTAP 7.3. Beware, it is UNDOCUMENTED and UNSUPPORTED. So chances are that it will bring your storage system to its knees.. Don’t say I did not warn you.
ontap1*> help hammer
hammer - stress disks/filesystem
ontap1*> hammer ?
usage: hammer [abort|pause|restart|status|
[-f]<# Runs><# BlocksInFile> (<# Runs> == -1 runs hammer forever)|
fill (use all available disk space)]
Let’s run it!
ontap1*> hammer 1024 /vol/smdst/test 1024
*** WARNING *** Hammer is a system level stress test.
CPU utilization may approach 100 percent
with very high disk IO rate when hammer is run.
This may adversely affect system performance
and may cause loss of filer service.
Hammer is an undocumented, unsuppported command.
Do you still want to run Hammer? yes
Mon Sep 15 21:38:27 EDT [blacksmith:warning]: blacksmith #0: Starting work.
CPU NFS CIFS HTTP Net kB/s Disk kB/s Tape kB/s Cache
in out read write read write age
78% 0 0 0 0 0 126 688 0 0 >60
25% 0 0 0 0 0 44 2314 0 0 >60
36% 0 0 0 0 0 39 2124 0 0 >60
60% 0 0 0 0 0 20 947 0 0 >60
27% 0 0 0 0 0 91 2183 0 0 >60
11% 0 0 0 0 0 183 2289 0 0 >60
29% 0 0 0 0 0 67 1629 0 0 >60
84% 0 0 0 0 0 10 611 0 0 >60
68% 0 0 0 0 0 33 911 0 0 >60
88% 0 0 0 0 0 19 381 0 0 >60
16% 0 0 0 0 0 171 2171 0 0 >60
94% 0 0 0 0 0 17 415 0 0 >60
62% 0 0 0 0 0 52 1313 0 0 >60
37% 0 0 0 0 0 24 1754 0 0 >60
35% 0 0 0 0 0 152 2128 0 0 >60
95% 0 0 0 0 0 15 56 0 0 >60
84% 0 0 0 0 0 12 579 0 0 >60
ontap1*> hammer status
blacksmith #0: file /vol/smdst/test, 2316 KB of 4096 KB writesize 4096 bytes, iteration 5 of 1024 - Writing
ontap1*> hammer abort
Mon Sep 15 21:39:01 EDT [blacksmith:info]: blacksmith #0: Detected Abort CleanUp Message
Mon Sep 15 21:39:01 EDT [blacksmith:info]: blacksmith #0: Stopping work
Nice!












Sneaked into 7.3? It was around since 6.x at least.
Oh WOW.. I have been around ONTAP for over 10 years and never managed to find it. Also, there is NO mention of this command anywhere.. but again, you might send me a link that will put me into shame :)