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SubjectRe: NFS client performance 1.5 orders of magnitude too slow? (fwd)
On Tue, Mar 09, 1999 at 01:51:30PM -0700, Godmar Back wrote:

> However, the default wsize may be an issue for large files.
> I reported that FreeBSD 3.0 takes 6 seconds to write a 12 MB
> file where Linux 2.2.3 with wsize=4k takes 14 seconds.
> (Btw, FreeBSD 2.2.8 takes only 2.5 seconds for the same file.)
> So I tested the Linux client with wsize=8k; it is still a lot slower.
> A Linux 2.2.3 client with wsize=8k takes about 30 seconds to write
> a 12 MB file (this is with a different server), while a BSD client takes
> about 18 seconds with the same server.

Here, using autofs (client : 2.2.2-ac7, server : 2.0.32/unfsd),
I have :

[pcodile]/alienor/home/danis/tmp > time cp /tmp/linux-2.2.2.tar.gz .
0.00user 1.77system 0:03.20elapsed 55%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (3322major+14minor)pagefaults 0swaps
That is, 3 secondes to copy a 12M files over a 100Mb link
using an 'old' userland nfs server.

The mount options is :

alienor:/home on /alienor/home type nfs (rw,nolock,soft,intr,rsize=8192,wsize=8192,addr=<something>)


> - Godmar

Thierry Danis

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