Re: Kernel 2.6.15.1 + NFS is 4 times slower than FTP!?

[Justin Piszcz <jpiszcz@lucidpixels.com>]

NFS is still twice as slow as FTP, but best with a r/w size of 8192.

DEFAULT, NO OPTIONS
# mount p34:/ /nfs/p34
$ /usr/bin/time cp 700mb.img  /p34/x/d
0.01user 1.64system 0:34.23elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+196minor)pagefaults 0swaps

TCP, NO CACHING
# mount p34:/ /nfs/p34 -o nfsvers=3,tcp,noac
$ /usr/bin/time cp 700mb.img  /p34/x/a
0.02user 5.25system 0:58.43elapsed 9%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+197minor)pagefaults 0swaps

UDP, NO CACHING
# mount p34:/ /nfs/p34 -o nfsvers=3,noac
$ /usr/bin/time cp 700mb.img  /p34/x/b
0.02user 5.54system 1:00.34elapsed 9%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+196minor)pagefaults 0swaps

UDP, NO CACHING (w/65535 r/w size)
# mount p34:/ /nfs/p34 -o nfsvers=3,noac,rsize=65535,wsize=65535
$ /usr/bin/time cp 700mb.img  /p34/x/c
0.01user 5.75system 0:59.89elapsed 9%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+196minor)pagefaults 0swaps

# mount p34:/ /nfs/p34 -o nfsvers=3,rsize=8192,wsize=8192
0.04user 1.78system 0:14.16elapsed 12%CPU (0avgtext+0avgdata 
0maxresident)k
0inputs+0outputs (0major+190minor)pagefaults 0swaps

UDP, NFSV3 + (w/8192 r/w size)
$ /usr/bin/time cp 700mb.img  /p34/x/g
0.04user 1.78system 0:14.16elapsed 12%CPU (0avgtext+0avgdata 
0maxresident)k
0inputs+0outputs (0major+190minor)pagefaults 0swaps

TCP, NFSV3 + (w/8192 r/w size)
0.03user 1.81system 0:14.98elapsed 12%CPU (0avgtext+0avgdata 
0maxresident)k
0inputs+0outputs (0major+190minor)pagefaults 0swaps

UDP, NFSV3 + (w/16384 r/w size)
# mount p34:/ /nfs/p34 -o nfsvers=3,rsize=16834,wsize=16384
$ /usr/bin/time cp 700mb.img  /p34/x/e
0.03user 1.75system 0:20.20elapsed 8%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+192minor)pagefaults 0swaps

UDP, NFSV3 + (w/32768 r/w size)
# mount p34:/ /nfs/p34 -o nfsvers=3,rsize=32768,wsize=32768
 /usr/bin/time cp 700mb.img  /p34/x/f
0.01user 1.59system 0:32.87elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+196minor)pagefaults 0swaps






On Mon, 16 Jan 2006, Phil Oester wrote:

> On Mon, Jan 16, 2006 at 08:07:02PM -0500, Justin Piszcz wrote:
> > I suppose I should try NFS with TCP, yes?
>
> Precisely.
>
> Phil
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