*BSD News Article 34706


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From: ska@kauss.rhein-main.de (Stephan Kauss)
Newsgroups: comp.os.386bsd.misc
Subject: NFS performance and mountd bug
Date: 21 Aug 1994 16:31:51 +0200
Organization: Stephan Kauss
Lines: 64
Message-ID: <337ogn$16a@kauss.rhein-main.de>
NNTP-Posting-Host: kauss.rhein-main.de
X-Newsreader: TIN [version 1.2 PL2]


Hi,

I have some network and disk performance questions.
And maybe a mountd bug.

My PC run's FreeBSD 1.1 and is a 486DX2 66MHZ EISA with a 8Bit WD8008E
Ethernet board and Adaptec 1542 SCSI controler with a Fujitsu M2624S Disk.

This PC is connect with a Ethernet to a SUN 4/110.
I mount the SUN to my PC and try some copy's with this result :
(The file xx on the SUN is 10485760 bytes)

mount s12:/home /mnt

Copy 10MB file to nothing.

time cp /mnt/tmp/xx /dev/null
0.0u 1.6s 0:19.76 8.3% 36+144k 1280+1io 0pf+0w
That's are ~ 530 kB/s

Copy file from the SUN Filesystem to the PC local disk.

time cp /mnt/tmp/xx /usr/tmp
0.0u 1.4s 2:41.91 0.9% 36+144k 1283+1282io 0pf+0w
That's are ~ 65 kB/s (very slow, Why ????????????????????????)

Copy file from my PC local disk to the SUN disk.

time cp /usr/tmp/xx ./zz
0.0u 4.9s 1:08.99 7.2% 36+144k 1281+1280io 0pf+0w
That's are ~ 151 kB/s (why is this so good (see befor))

Copy the file from the local PC disk to the local PC disk.
time cp /usr/tmp/xx /usr/tmp/zz
0.0u 1.8s 1:02.69 2.9% 36+144k 1288+1282io 0pf+0w
That's are ~ 166 kB/s

This are the times on my SUN :

Copy the file form the local disk to the local disk (SUN).
time cp xx /home1/tmp
0.0u 3.8s 0:08 46% 0+288k 7+285io 3pf+0w
That's are ~ 1310 kB/s

SUN with mounted pc device

Copy file form PC to the local SUN device
time cp /mnt/tmp/xx /home/tmp/xx
0.0u 5.0s 0:42 11% 0+256k 7+235io 1280pf+0w
That's are ~ 249 kB/s

Has somebody a idea why the copy performance are so different ?
What is the way to tune the PC ?
(Not to by a new Ethernet and SCSI board) I think the copy from the SUN
to the PC take to many time.

After this action on my PC (FreeBSD) there are 139 mountd running.
Has anybody a idea why ? Or what's go on my system wrong ?
Is this a known bug ???
Has someone other expirence ?

Stephan