[OpenAFS-devel] Suggestion to turn off jumbograms to help vos performance...

[Neulinger, Nathan]

Per Derrick's suggestion during the AFS workshop at Lisa, I've tried
shutting off jumbograms on my volserver with the -nojumbo option, however,
as near as I can tell, this doesn't result in any change to dump
performance. As it happens, the system I am testing on is already doing
around 8mb/sec, but it's a completely idle test cell with nothing on it. I
can't really test on my production file/vol servers unless there is a way to
tell vos to not use jumbograms (i.e. like the rxtune tool could do for
individual clients).

Derrick, was there something I missed besides just adding the -nojumbo
option to volserver? From your description, I was figuring on seeing at
least a perceptable increase, but I can't see any change. 

This testing was done purely from localhost. I have not tried from remote
hosts yet. 

Do you still have the patch you used to instrument the server to where you
could see the problem (where it was repeatedly traversing the list)?

-- Nathan

------------------------------------------------------------
Nathan Neulinger                       EMail:  nneul@umr.edu
University of Missouri - Rolla         Phone: (573) 341-4841
Computing Services                       Fax: (573) 341-4216