100Mbps Ethernet Speed/Efficiency
Jeff Vian
jvian10 at charter.net
Tue Apr 6 22:42:09 UTC 2004
Neall wrote:
>>On Tue, 2004-04-06 at 22:18, Neall wrote:
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>>>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 at orchards.org.uk> wrote:
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>>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!
>>
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>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
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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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