[Beowulf] OT: effective amount of data through gigabit ether?

Michael Will mwill at penguincomputing.com
Mon Oct 4 17:13:57 EDT 2004


On Monday 04 October 2004 01:40 pm, Mike wrote:
> I know this is off topic, but I've not found an answer anywhere.
> On one IBM doc it says the effective throughput for 10Mb/s is
> 5.7GB/hour, 100Mb/s is 17.6GB/hour, but only lists TBD for 1000MB/s.

I would assume 900Mb/s as an optimistic best case throughput for the GigE, 
which would be about 395GB/hour.  

17.6GB/hour seems like a really low estimate, that would be only
about 40Mb/s effective transfer rate over an 100Mb/s link? Maybe
that number is really measuring the tape writing speed instead?

Michael Will
> Does anyone know what this effective number is? This is for
> calculating how long backups should take through my backup network.
> 
> (I'm not interested in how long it takes to read/write the disk,
> just the network throughput.)
> 
> Mike
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