[X-Unix] Pokey LAN transfers

[Nick Scalise]

On Dec 26, 2007, at 3:54 PM, Richard Hartman wrote:

> I'm looking for guidance on how best to copy large data sets between  
> macs on a network (Finder, terminal cp, other?).
>
> The setup: Copying from mac #1 (a 2006 iMac running 10.4.11 with  
> built-in 100bps ethernet) to mac #2 (a recent PBPro running 10.5.1  
> with built-in Gigabit ethernet). Macs connected by a Gigabit netgear  
> switch.
>
> I had hoped to get sustained transfers between these two macs of  
> 50-70 mbps (throttled by the rate-limiting 100 mbps iMac capability).
>
> However, copying a single 2 GByte file, by mounting the (Tiger) imac  
> on the (Leopard) MBPro desktop and using terminal "cp" command from  
> the MBPro terminal, results in a sustained transfer rate of only  
> about 2.5 mB/sec (25 mbps).
>
> So, the questions:
>
> - Is this rather low transfer rate normal for my setup?
>
> - Might I improve it using other tools?


Do you have your network cards locked in at their rated speeds? It  
could be that they are not negotiating with the Gig switch properly.

For the 100Mbps Mac, locked at '100MB/Full duplex' and the Gigabit Mac  
locked at '1G/Full?'

--
Nick Scalise
nickscalise at cox.net