Subject: Re: [netatalk-admins] Slow write performance on FreeBSD 2.2.5, 1.4b2
From: Gary Teter (garyt@bulldogbeach.com)
Date: Fri Feb 27 1998 - 18:15:14 EST
Stefan Bethke <stefan@promo.de>, on 2/27/98 1:52 AM wrote:
>--On Mon, 23. Feb 1998 13:47 Uhr -0800 "Bill Studenmund"
><skippy@macro.stanford.edu> wrote:
>
>> On Sat, 21 Feb 1998, Gary Teter wrote:
>>
>>> I'm having troubles with my installation of netatalk-1.4b2 on FreeBSD
>>> 2.2.5:
>>>
>>> Read performance from the server is great, but write performance is
>>> really, really lousy. The client is a PowerMac 604e/200 clone, 10baseT
>>> network. (Actually on a large file it's great for the first 1.8MB or so,
>>> then it seems to pause for big chunks of time.)
>
>Sounds like you're running NT :-)
>
>Please be a bit more specific about what "slow" means. Generally, you should
>see numbers around 500 kBps for reading and 600 for writing.
Sorry for the imprecision! I posted that at the end of a loooong day.
Here's some better information:
The machines:
Morris - Pentium 166, 72MB RAM, FreeBSD 2.2.5 appletalk kernel
patch, netatalk-1.4b2 no patches
Lilith - PowerCenter Pro 210 Mhz 604e, 128MB RAM, 4096K disk cache,
VM on, Sys8.
BeastieBoy - APS 200 Mhz 604e clone, 128MB RAM, 7680K disk cache, VM
on, Sys8.
Jane - Quadra 605 (33 Mhz 680LC40), 36MB RAM, 7680K disk cache, VM
off, Sys8, SpeedDoubler 8's speed copy server on.
Using the same 47MB file for each test. 10baseT network. Morris,
BeastieBoy and Jane are all on same hub; Lilith is on another hub
uplinked to the first hub. There are other Macs on the network but none
were being used during these tests (ie, personal filesharing on, drives
mounted, but no files being actively read or written).
(sd) means SpeedDoubler 8, faster network copy on, use tcp/ip if avail.
on.
Lilith copy from Lilith(sd) to Morris: 480KB/sec <-- this is OK!
Lilith copy from Morris to Lilith(sd): 470KB/sec - 485KB/sec <-- so is
this
Lilith copy from Lilith(sd) to Jane: 215KB/sec - 250KB/sec <-- just for
laughs
Lilith copy from BeastieBoy(no sd) to Lilith(sd): 370KB/sec
Lilith copy from Lilith(sd) to BeastieBoy(no sd): 410KB/sec
Lilith copy from BeastieBoy(sd) to Lilith(sd): 640KB/sec
BeastieBoy copy from Morris to BeastieBoy(sd): 520KB/sec - 570KB/sec
So far all these figures are well within tolerance for not using TCP/IP.
But this next one is the one I was asking about:
--> BeastieBoy copy from BeastieBoy(sd) to Morris:
Starts at 265KB/sec. After 1MB transferred, throughput drops to about
16KB/sec(!) Transfer seems to go in chunks separated by pauses. I
observed this same behavior with SpeedDoubler 8 turned off (but without
the throughput numbers because the standard Sys8 Finder copy doesn't give
throughput values).
By the way, using Timbuktu Pro 4.02's copy via TCP/IP, Lilith can read
the same file from BeastieBoy at 970KB/sec - 1020KB/sec.
Maybe when I get asun's patches running I'll see similar performance from
Morris.... that's my next project. (The project after that is to install
a 100baseT card in Morris and replace the hubs with a 10baseT+100baseT
switch...)
Any suggestions? I'll be rewiring the network this weekend and changing
hubs around (because we're moving to a new office, not because I've got
too much free time on my hands :-) so I'll see if that helps.
-- Gary Teter, Landless Peasant Bulldog Beach Interactive http://www.bulldogbeach.com
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