Re: nfs performance problem

["poczta.dotcom.pl" <myciel@dotcom.pl>]

----- Original Message -----
From: "Ragnar Kj=F8rstad" <nfs@ragnark.vestdata.no>
To: "poczta.dotcom.pl" <myciel@dotcom.pl>
Cc: <nfs@lists.sourceforge.net>
Sent: Tuesday, November 05, 2002 8:17 PM
Subject: Re: [NFS] nfs performance problem


> On Tue, Nov 05, 2002 at 07:03:43PM +0100, poczta.dotcom.pl wrote:
> > Hi All
> >
> > I have really slow working nfs.
> > Server is build on:
> > - dual pentium Xeon 2GHz,
> > - 2 3ware 7500 controllers,
> > - raid 5 on 7 160GB discs on controler 1
> > - raid 5 on 6 160GB disks on cotroller 2
> >
> > Serwer is used for ~500k maildirs,
> > all clients (~20) are freebsd boxes, when nfs transfer is around 1MB/=
s
for writing and 1.5MB/s for reading
> > listing user directories even with very few file stakes up to 15
seconds.
> >
> > I tried nfs-ALL patch, but it didn' t help.
>
> How is local performance?

local read/writes are ok

> What filesystem do you use?

reiserfs on top of  lvm (to be able to get snapshots)

> What's the output from "iostat -x -d -k 60 3"?
>
below is output from 'iostat -d 60 3'  (- my iostat does not take '-k'
option,
and '-d' gives me empty output) - mayby this is enough?

Linux 2.4.19 (hostname)        11/05/02

Device:        tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
dev8-0       16.16       205.52        82.84    3481842    1403528
dev8-1      160.58      1266.39      1346.12   21455002   22805744

Device:        tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
dev8-0        9.23       134.93        16.13       8096        968
dev8-1      150.92       753.20      1715.87      45192     102952

Device:        tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
dev8-0       10.02       135.07        26.53       8104       1592
dev8-1      152.78       763.33      1767.20      45800     106032


rafal



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