anselmo-ed@CS.YALE.EDU (Ed Anselmo) (02/22/91)
Is there a magic formula for determining how man nfsd's to run?
"System Performance Tuning" by Loukides says "...4 is appropriate for
most situations. The effects of changing this number are hard to
predict and are often counterintuitive. For various reasons that are
beyone the scope of this book, increasing the number of daemons can
often degrade network performance."
The SunOS 4.1.1 man page suggests 8 nfsd's.
What happens when you run too many nfsd's? Too few?
In our case, we're running Sun 4/390 servers, typically with 2 1 GB
IPI disks on one controller. Each server serves around 20
"sorta-standalone" Sun 4/60 clients (/, swap, and /usr are on the
client, /home is on the server).
--
Ed Anselmo anselmo-ed@cs.yale.edu {harvard,cmcl2}!yale!anselmo-edchucka@cup.portal.com (Charles - Anderson) (02/24/91)
> Is there a magic formula for determining how man nfsd's to run? > > "System Performance Tuning" by Loukides says "...4 is appropriate for > most situations. The effects of changing this number are hard to > predict and are often counterintuitive. For various reasons that are > beyone the scope of this book, increasing the number of daemons can > often degrade network performance." > > The SunOS 4.1.1 man page suggests 8 nfsd's. > > What happens when you run too many nfsd's? Too few? > > In our case, we're running Sun 4/390 servers, typically with 2 1 GB > IPI disks on one controller. Each server serves around 20 > "sorta-standalone" Sun 4/60 clients (/, swap, and /usr are on the > client, /home is on the server). > -- > Ed Anselmo anselmo-ed@cs.yale.edu {harvard,cmcl2}!yale!anselmo-ed We are running 50-60 clients using DOS PCNFS and 4-6 mounts each. We picked 16. Seems to be working pretty well. We have 16 Meg memory and 1 G Disk. I think we could get by with 12. But, no one is complaining about performance, which can go down due to swapping. Chuck Anderson
cornell@csl.dl.nec.com (Cornell Kinderknecht) (03/01/91)
>> Is there a magic formula for determining how man nfsd's to run?
I was talking to a Sun software support person yesterday about a different
subject but she made the comment that based on Sun's tests, after 22 nfsd's
running, there was no increase in performance. So she had recommended a
maximum of 22.
I suppose there is no problem with running more besides that they aren't
needed. Running too few I would guess, might cause problems when a lot
of nfs requests come in at the same time.
--- Cornell Kinderknecht