Re: Transfer rate on LAN?

From: CL (dnoyeB) Gilbert (Fake_at_ThisOneIsFake.com)
Date: 07/26/05 

Date: Tue, 26 Jul 2005 10:44:19 -0400

Just what I was thinking. With a hub, how is it not going to be limited
by the speed of its slowest connection. If you plug a 10mb connection
into the HUB, all connections will be effectively 10mb. Plus hubs have
a lot of collisions and are 1/2 duplex. It will still physically link
at 100Mb, but throughput has to be limited by the slowest computer. And
that limit is probably going to come in the form of collisions.

switch is way better. I dont think you can even find hubs anymore...

CL

Paul wrote:
> To make sure all of your machines connected to the hub all have 100Mbit
> card and the hub supports 100Mbit correct?
>
> If so, the average that you should usually see for server to computer
> transfer is aproximatly 5-6 MiB a second, However remember that hub is
> an dumb device, in that it broadcast the information to all interface
> and it increases the network traffic so it probably would affect your
> speed, if you get an switch it should improve.
>
> -paul
>
> John Heim wrote:
>
>>G_r_a_n_t_@dodo.com.au wrote in
>>
>>
>>>> Maybe the whole network is
>>>> slow
>>>>because of that one card?
>>>
>>>No, but what sort of transfer test are you using?
>>
>>
>>Primarily scp. When you scp a file, it gives you the transfer rate. But
>>also HTTP and FTP. If I transfer a file from my server to my Windows
>>machine, I get similar speeds, about 1M/sec. I commonly wget a file to
>>the linux server and then copy it to other machines on my LAN.
>>
>>I have 2 Windows machines, 2 linux machines, and an Apple Macintosh
>>connected through the hub and they all get the same rate (approximately)
>>when getting files from the server.
>>
>>The machine I mainly run tests on is about 6 feet from the server.
>>There's a 3 foot cable running from the linux server to the hub and then
>>an 8 foot cable running to the other machine. But there is another
>>machine on my network that is on another floor and there is a cable
>>running through the walls and ceilings over to it. Is the speed of the
>>LAN dependent upon the speed to the slowest connection? I mean, will the
>>server talk different speeds to different machines on eth1?
>>
>>
>> 

-- 
Respectfully,
CL Gilbert

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