Re: 100Mbps Ethernet Speed/Efficiency

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Neall wrote:

On Tue, 2004-04-06 at 22:18, Neall wrote:





I took the hard drives out of the picture. I set up RAM disks on two
different systems, and connected them via ethernet using NFS to cross
mount them.



At a later time, Laurence Orchard <laurence@xxxxxxxxxxxxxxx> wrote:



have you considered putting the data file in a ram disk to overcome the
disk transfer overhead? assuming you have enough physical memory so you
don't hit swapping!



This is exactly what I did. Didn't I say that? :) The systems have 1 GByte RAM each, and the RAM disks were set to 100 Mbytes each. The data file was copied from the hard drive to the local RAM disk, then the timing began. RAM disk to RAM disk, via ethernet. Neall



IIRC you said you did that, then said you had cross mounted the ram disks via NFS.

If in fact I understood correctly, your test would have involved transfering the data on the network 3 tines.

Hosts involved --  Host1 & Host2

test:  Host 1 requests file from Host2

flow: NFS Host1 to Host2
         transfer Host2 to Host1
         stored (NFS Host1 to Host2)

If I misunderstood and you simply mounted the ram disks locally then it would be a different test and a simple one way transfer.

Jeff



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