[OpenAFS] OpenAFS directory update is SLOW. Performance tuning?
Noel Burton-Krahn
noel@burton-krahn.com
Fri, 22 Mar 2002 16:26:56 -0800
Thanks for the suggestion. However I notice that my Linux AFS client works
quite well. My WinXP client on the other hand is really sluggish. Both
clients are on the same box. The Linux client is actually running emulated
under VMWare (which is a wonderful product!) and it still beats un-emulated
WinXP hands down. A CVS update under WinXP on an AFS directory takes 1.5
minutes, on Linux AFS it takes about 12 sec, and on either raw hard drive
takes 8 sec. Mind you, my CVS tree is pretty huge with over 1500 files.
(find . -name Entries | xargs cat | wc = 1523)
--Noel
----- Original Message -----
From: "John Bleichert" <syborg@stny.rr.com>
To: "Noel Burton-Krahn" <noel@burton-krahn.com>
Cc: <openafs-info@openafs.org>
Sent: Friday, March 22, 2002 3:00 PM
Subject: Re: [OpenAFS] OpenAFS directory update is SLOW. Performance tuning?
> On Thu, 21 Mar 2002, Noel Burton-Krahn wrote:
>
> > Date: Thu, 21 Mar 2002 13:42:56 -0800
> > From: Noel Burton-Krahn <noel@burton-krahn.com>
> > To: openafs-info@openafs.org
> > Subject: [OpenAFS] OpenAFS directory update is SLOW. Performance
tuning?
> >
> > Hi,
> >
> > So, I've got AFS set up serving from my Linux box to my WinXP client.
> > Great. I moved my home directory to AFS. Then I did a "cvs update" in
one
> > of my project directories now under AFS. S-L-O-W! AFS was about 12x
sloser
> > than a "cvs update" on a local disk. Is there some way to improve that?
> >
>
> Is the server slow? I cant give you numbers (cuz I'd be guessing) but I've
> gotten this slow service from running AFS on a server with bad disk and
> RAM I/O (not bad, just old - a temporary mirror during an upgrade or 5) -
> does it take the server a long time to spool from disk to memory?
>
> A fast client can bury and old server on a fast network..
>
> Just a guess - JB
>
>
>
> > It took 1.5 minutes to update on AFS, 7 seconds off local disk. The
> > directory I did my "cvs update" in has 13022 files and 1220 directories.
My
> > AFS client was configured with Cache Size: 200000, Chunk Size: 32kb,
Status
> > Cache: 10000 entries.
> >
> > That kind of slowdown is just too much. This might be the end of AFS
for
> > us. Is there any way to improve that?
> >
> > --Noel
> >
> >
> >
> > ----- Original Message -----
> > From: "Hartmut Reuter" <hwr@rzg.mpg.de>
> > To: "Dong Fangpeng" <fpdong@ict.ac.cn>
> > Cc: <openafs-info@openafs.org>
> > Sent: Monday, March 18, 2002 7:10 AM
> > Subject: Re: [OpenAFS] Help!
> >
> >
> > > On Mon, 18 Mar 2002, Dong Fangpeng wrote:
> > >
> > > > hello:
> > > > It seems that installing AFS is a hard work for me, so I have to ask
for
> > help again! The situation is :
> > > >
> > > > I started BOS by " ./bosserver -noauth &" and then input
> > > > "./bos setcellname dfp.linux.ict.ac.cn dfp.linux.ict.ac.cn -noauth"
to
> > name my cell,
> > > > "./bos listhost dfp.linux.ict.ac.cn" returned following:
> > > >
> > > >
> > > > Cell name is dfp.linux.ict.ac.cn
> > > > Host 1 is dfp.linux.ict.ac.cn
> > > >
> > > > "./bos status dfp.linux.ict.ac.cn " told me the kaserver, buserver
and
> > vlserver running normally
> > > > but when I input "./bos create ...."commands,following error
returned:
> > > >
> > > > "bos:could not find entry (can't find cell 'dfp.linux.ict.ac.cn' in
> > cell database)"
> > > >
> > > > The content of file CellSVDB in /usr/afs/etc/ is :
> > > >
> > > > >dfp.linux.ict.ac.cn #Cell name
> > > > 192.168.1.27 #dfp.linxu.ict.ac.cn
> > >
> > > The klog command is a client command which uses
/usr/vice/etc/CellServDB
> > > to find the database servers of the cell. Probably this one doesn't
> > > contain your new cell.
> > >
> > > Hartmut
> > >
> > >
> > >
> > > >
> > > > Then what's the problem, and what should I do?
> > > >
> > > > Thanks for any answer!
> > > >
> > > > Fangpeng Dong
> > > >
> > > > ICT of CAS
> > > > phone: 86-010-62565533-9313/9310
> > > >
> > >
> > > -----------------------------------------------------------------
> > > Hartmut Reuter e-mail reuter@rzg.mpg.de
> > > phone +49-89-3299-1328
> > > RZG (Rechenzentrum Garching) fax +49-89-3299-1301
> > > Computing Center of the Max-Planck-Gesellschaft (MPG) and the
> > > Institut fuer Plasmaphysik (IPP)
> > > -----------------------------------------------------------------
> > >
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> > >
> > >
> >
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> >
>
> |-John Bleichert----syborg@stny.rr.com----------------|
> |-------------------http://vonbek.dhs.org/latest.jpg--|
>
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