[Beowulf] number of NFS daemons

Bill Wichser bill at Princeton.EDU
Thu Mar 8 06:29:59 PST 2007


Once upon a time there was a hardcoded limit on the number of threads an 
nfsd could support.  Twenty is the number I seem to recall but I haven't 
researched this for awhile.

I've used this as a baseline for how many daemons to start by:
(num of mounts * num of nodes) / 20


Kozin, I (Igor) wrote:
> Hello!
> I was looking at our NFS server performance recently
> and was puzzled by the number of the daemons it was 
> running - 33. It might be the default for Suse 10.1
> but I am not sure. It's usually recommended to set the
> number to a multiple of 8 with 32 being perhaps the
> most popular. I've read that 16 or 32 nfsd daemons 
> produces the most efficient blocking for I/O operations.
> How many NFS daemons people are using on a dedicated
> NFS server?
> Best,
> Igor
> I. Kozin  (i.kozin at dl.ac.uk)
> CCLRC Daresbury Laboratory, WA4 4AD, UK
> skype: in_kozin
> tel: +44 (0) 1925 603308
> http://www.cse.clrc.ac.uk/disco
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