lkml.org 
[lkml]   [1999]   [Jun]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Poor NFS client write performance Linux->Solaris
On Fri, Jun 04, 1999 at 04:19:23PM +1000, Richard Gooch wrote:
> Hi, all. I've just tried measuring Linux NFS client performance on a
> dual PPro running 2.3.4. Block size is 8 kiB, network is 100 Mb/s
> switched full duplex. The server is running Solaris 2.5.1 on a quad
> UltraSparc (250 MHz).
>
> Read bandwidth is 4.1 MB/s
> Write bandwidth is 0.2 MB/s
>
> Why is NFS write performance so bad? I apologise for not having paid
> closer attention to this, if this is a well-worn topic.
>
> Regards,
>
> Richard....
>
> -

I have got that as well on against one of our Solaris 2.5.1
servers. One gives a 'poor' but not so bad performance compared
to the other one (client is 2.2.6-ac1, 2.2.7-ac1 or 2.2.9) :
1400809 bytes/second for writing the file
1640707 bytes/second for reading the file

Using FreeBSD against the same 'medium' gives better results :
3865717 bytes/second for writing the file
3573897 bytes/second for reading the file

The Dual Entreprise 450 gives between 80 Ko/s and 100 Ko/s
(using 2.2.6-ac1, 2.2.7-ac1 or stock 2.2.9) writing, and 3,0 Mo/s
reading. Both servers seem to have the same patches applied, so I do
not really understand (maybe the 'slow' server is running log file
systems, and not the other one).

Using FreeBSD against the same 'slow' server gives better results
(but really not amazing given the supposed performance of the U450) :
1377439 bytes/second for writing the file
3491616 bytes/second for reading the file

However, just to remind, FreeBSD against a Linux 2.2.9/Knfsd
gives 7,8 Mo/s writing and 6,8 Mo/s reading.

To me, it seems that 2.2.x series behaves really worst than
2.0.x against Solaris servers, and much better against Linux
servers.

A+,
--
Thierry Danis
Poste : 53 53 danis@spmo.sagem.fr

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:52    [W:0.145 / U:1.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site