Subject: Re: Speeding up netatalk
From: Marcus Radich (marcus@darena.co.nz)
Date: Fri Apr 14 2000 - 19:22:07 EDT
Greetings
We have over 20 systems (we are a consulting firm, these are in
client sites) here in NZ which deliver OVER 9MB/sec throughput. We
have measured this with Helios Lantest and by manually timing large
copies.
Our servers have insanely fast motherboards and hard disk speeds. Try
this on your system:
/sbin/hdparm -tT /dev/sda (or hda, or md0 whatever your disk is)
I ran this on a system we installed last week and the figures were:
Buffer-cache reads: 144MB/sec
Buffered-disk reads: 60.14MB/sec
This 'roughly' shows a fast motherboard and a fast RAID (in this case)
Configuration:
Intel Lancewood motherboard (L440GX+)
Pentium III 550
128MB RAM
4xIBM 34GB Ultra2 drives - software RAID O+1
Digital 21143 based ethernet card (not onboard)
Red Hat 6.1
Netatalk asun2.1.4 37b (with my slight modifications)
The Helios Lantest figures (with a 30MB test file) for this server
testing from a G4/450 were:
Reads: 9.2MB/sec
Writes: 9.3MB/sec
This is running through a Lucent Cajun P120 switch over 100BaseT.
Make sure your Macs are mounting your netatalk server over IP (get
info on the server icon to see it's connection type), this makes a
HUGE difference.
mrad01
At 6:23 PM +0200 14/4/2000, Lutz Michaelsen wrote:
>John Grieg wrote:
> >
> > I have a Pentium 266 Linux Box with 4 SQSI (Adaptec 2940) disks (fast and
> > wide) 20 Mb, 9Mb, 2x4Mb
> > and 128 Mb RAM and a 3c905b 100 network card.
> >
> > I was pretty satisfied with the transfer times (we had NT earlier) at
> > almost 2 Mb a sec.
> >
> > Then I read about someone transfering 500 Mb in a minute.
> >
>
>Whow ... 8,3MB/sec. How can they do this?
>
>I think the transfer rate of your hardisks are limiting the thruput.
>
>I'm running a K6-2/300 with rather the same Ultra-SCSI-Controller
>with 9GB disks
>(1-2 years old) and the maximum thruput I can get with ftp/netatalk is around
>3-4MB/sec. (with big files). If you have a lot of small files it
>will slow down.
>
>Do you have a switched network?
>How is your Linux box connected to your clients?
>Are you using "afpoverip" ?
>
>To accelerate the thruput you can buy faster harddisks (>7200rpm) or
>configure a
>soft raid 0 with your old harddisks.
>
>Best Regards,
>Lutz Michaelsen
>
>--
>EASi-Engineering GmbH Tel. ++49 (0) 89 / 1407-9872
>Pelkovenstr. 81-b Fax ++49 (0) 89 / 1407-9696
>D-80992 Muenchen eMail mailto:lutz.michaelsen@easi.de
>Germany WWW http://www.easi.de
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"Always ask the question, never assume the answer."
Marcus Radich 1999
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