Re: Slow network

On Sun, 14 Aug 2005 09:42:04 +0100, Martin Liddle wrote:

> In message <JlCLe.6957$QU4.6515@xxxxxxxxxxxxxxxxxxxx>, Buzzbomb
> <buzzbomb@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> writes
>>Steve wrote:
>>> I have a very simple network, normally used only to share an internet
>>> connection between 3 or 4 computers. It's a smoothwall box with thin coax
>>> interconnections. It works fine like that, each computer sees the 512k
>>> ADSL speed if the others aren't loading it.
>>> I've upgraded one machine and wanted to transfer some stored data
>>>across
>>> from the old one so I set up a NFS share on the old one (using
>>> Yast/SuSE8.2) and mounted it on the new one (Mandriva 2005LE) but when I
>>> come to transfer the data, the speed is very low. One directory of about
>>> 12M took 18 minutes to copy. I don't expect blazing speed from this setup,
>>> but surely it should go faster than that?
>>> Any suggestions on where to look/tweak, please? Please bear in mind
>>>I'm
>>> very much a user, not a programmer.
>>> Thanks,
>>> Steve
>>I'd expect around 4-5 minutes for a file of that size.
>>
> Why? I'd expect under a minute for a small network with low contention.
> Is the coax properly terminated? What cards and drivers are you using?
> Can you isolate the problem to one computer by attempting a transfer
> using one of the other computers on the network.
The coax and terminations are ok - I run a rf design business, hence the
use of caox as it's readily available!

The cards are Realtek 8039(?) PCI cards, I think NE2k generic drivers are
used at both ends.

Here's ifconfig output. After checking email, mounting and listing the
directory 2Mb rx data produced 3 collisions, copying about 4Mb of files
has it up to 10. Can't see any other differences.

[root@localhost /]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:00:B4:56:C5:85
inet addr:192.168.0.186 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::200:b4ff:fe56:c585/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10772 errors:0 dropped:0 overruns:0 frame:0
TX packets:8013 errors:0 dropped:0 overruns:0 carrier:0
collisions:10 txqueuelen:1000
RX bytes:7473401 (7.1 Mb) TX bytes:1239770 (1.1 Mb)
Interrupt:11 Base address:0xdf80

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:20 errors:0 dropped:0 overruns:0 frame:0
TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1400 (1.3 Kb) TX bytes:1400 (1.3 Kb)

sit0 Link encap:IPv6-in-IPv4
inet6 addr: ::127.0.0.1/96 Scope:Unknown
UP RUNNING NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

I'll try isolating the two computers later, when I get a chance.

Steve
.

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