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ChrisCol
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Joined: 15 Nov 2003
Posts: 49
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 Posted: Sun Jan 04, 2004 12:11 am Post subject: Slow Samba and ftp on local network |
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Hi,
I am transfering files between 2 gentoo boxes on my network and the transfer speeds I have are:
smb 2.0MB/s
vsftp 5.5 MB/s
Aren't these alittle slow? At the very least samba should be closer to vsftp shouldn't it??
Heres all the info that I can think of...
One of the boxes is a P233 with 256MB RAM and the other is an XP2000+ with 512MB Ram.
They are both running the latest 'emergeable' version of samba and vsftp (via xinetd) (all without ACCEPT_KEYWORDS="~x86"). There are no erros in the logs of either machine.
CPU usage was around 60-70% on the 233 machine when transfering with samba (smbd) and areounf 90% when using vsftp. Normal loadd averages are around <0.1 (usually <0.05) but ris considerably during transfer.
DMA is on for all drives. and hdparm -Tt gives:
On the XP2000:
| Code: | bash-2.05b# hdparm -Tt /dev/hda
/dev/hda:
Timing buffer-cache reads: 1260 MB in 2.00 seconds = 628.84 MB/sec
Timing buffered disk reads: 170 MB in 3.03 seconds = 56.15 MB/sec
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And on the P233
| Code: | gateway root # hdparm -Tt /dev/hdd
/dev/hdd:
Timing buffer-cache reads: 168 MB in 2.04 seconds = 82.20 MB/sec
Timing buffered disk reads: 48 MB in 3.04 seconds = 15.77 MB/sec
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The file system is ReiserFs on the P233 and ext3 on the XP2000+.
I am almost sure the problem is on the P233 due to it's high CPU usage and the fact the XP2000 has worked fine in the past...
Both systems are using the 2.6.0 gentoo-dev-sources kernel.
Finaly the network is a 100M ethernet one, and the cards have been tested and are fine.
I guess the options are Kernel configuration, network hardware or that the 233 just isn't up to fast transfer speeds. And probably more I'm not aware of...
If anyone has any advice then it would be much appreciated!
[Edit: to correct the swapped disk speeds...]
Last edited by ChrisCol on Sun Jan 04, 2004 1:04 pm; edited 1 time in total |
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scout
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Joined: 08 Mar 2003
Posts: 1991
Location: France, Paris en Semaine / Metz le W-E
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| Posted: Sun Jan 04, 2004 12:36 pm Post subject: |
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If you want to test the speed achievable regarless of the disks, to retrieve a file, use wget ftp://blabla/blopblop -O /dev/null so that files are directly sent to trash. By the way, which computer has the servers ? the P233 ?
Haven't you swapped your disk read speeds ? Why is the XP200+ so slow and the P233 so fast ?
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ChrisCol
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Joined: 15 Nov 2003
Posts: 49
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| Posted: Sun Jan 04, 2004 1:20 pm Post subject: |
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Hi,
Yep, your right the server is the 233 and I have swapped the disk speeds. (it was late at night after many hours puzzling...)
Using wget I have a transfer speed of 4.39 MB/s. So I guess the problem lies on the 233 and not on the XP2000. I have no idea what though. |
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Angrybob
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Joined: 19 Apr 2003
Posts: 575
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| Posted: Sun Jan 04, 2004 1:41 pm Post subject: |
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the max transfer speed of a 100Mbps network is 10MB/sec, maybe one of you're computers is in half duplex mode? that would explain the 5MB/sec ftp speed... I've found that smb can be slower than ftp so that shouldnt be a surprise.
so i guess you should check dmesg for anything about half duplex mode |
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ChrisCol
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Joined: 15 Nov 2003
Posts: 49
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| Posted: Sun Jan 04, 2004 1:48 pm Post subject: |
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Both appear to be in full duplex mode if I am undestanding the output correctly:
P233: (eth0 is the external if, eth1 the local network)
| Code: | gateway root # dmesg | grep ^eth
eth0: RealTek RTL-8029 found at 0x6600, IRQ 10, 00:C0:DF:A5:11:46.
eth1: NatSemi DP8381[56] at 0xd090f000, 00:09:5b:05:e2:78, IRQ 11.
eth1: link up.
eth1: Setting full-duplex based on negotiated link capability. |
XP2000+
| Code: | bash-2.05b$ dmesg | grep ^eth
eth0: RealTek RTL8139 at 0xe181ff00, 00:90:47:03:ad:16, IRQ 5
eth0: Identified 8139 chip type 'RTL-8100B/8139D'
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1 |
Thanks for the idea, |
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ChrisCol
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Joined: 15 Nov 2003
Posts: 49
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| Posted: Sun Jan 04, 2004 2:06 pm Post subject: |
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| Aside from the duplex possibility, is it normal for the CPU usage to be so high when serving files? |
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scout
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Joined: 08 Mar 2003
Posts: 1991
Location: France, Paris en Semaine / Metz le W-E
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| Posted: Sun Jan 04, 2004 2:20 pm Post subject: |
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With pure-ftpd I serve files at 10Mo/sec that is to say the maximum my ethernet card can do on a 100Mbps networks, and on a P4 2.0GHz, this eats 3% of CPU Usage (kernel 2.6).
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g_os
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Joined: 25 Nov 2003
Posts: 71
Location: France
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| Posted: Sun Jan 04, 2004 8:56 pm Post subject: |
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| scout wrote: | | With pure-ftpd I serve files at 10Mo/sec that is to say the maximum my ethernet card can do on a 100Mbps networks, and on a P4 2.0GHz, this eats 3% of CPU Usage (kernel 2.6). |
Hi, using apache2 a server on a PII-233 256Mo ram. DD 7200 (hdma on) to retrieve a 91MB file on a full duplex ethernet 100Mbit/s network. I achieve 8 MB/s [CPU on server -> 60/80% used]. On a smaller file 11MB limitation occurs at 10MB/s
G_os
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