Re: nfs write speed performance... still

[Peter Hessler <phessler_(_at_)_theapt_(_dot_)_org>]

On Fri, 5 Nov 2004 09:36:37 +0100
Antoine Jacoutot <ajacoutot_(_at_)_lphp_(_dot_)_org> wrote:

:Hi :)
:
:I know some improvements on NFS were made with 3.6, but I'l still
:experiencing the same unsolvable problem I've been having for a while now.
:I am no coder, so there's nothing much I can do to help resolve this issue,
: except testing, trying... anything. I would really like to use OpenBSD as
: an 
:NFS server in production environment.
:
:The problem I'm facing is that NFS writes are _really_ slow and, while
:copying a file to an NFS server, I cannot do anything anymore (since /home
:is also mounted on NFS). It looks like if my /home was mounted over a 56k
:connexion and that I was already downloading a file at full speed...
:
:Here is my configuration ; note that I did not provide the dmesg since 
:there're 2 machines involved, I did not want to make this message look to 
:huge, but let me know if you need it.
:
:** openbsd_nfs_server **
:- OpenBSD-3.6
:- xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500

:** openbsd_nfs_client **
:- OpenBSD-3.6
:- xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500

I had nothing but problems with xl(4) cards.  When I swapped them to dc(4),
my nfs writes went from 600K/sec to 6M/sec.  This was on an unused[1]
100baseT network, with a cheapo netgear switch.

[1] My home network, which I unplugged everyone else during the tests.

-- 
Steinbach's Guideline for Systems Programming:
	Never test for an error condition you don't know how to
	handle.