>From a network standpoint the following applies: 100M(Bits)ps = 100,000,000Bps Full Duplex = 200,000,000Bps In Bytes = 100,000,000/8 = 12,500,000 In bytes FD = 200,000,000/8 = 25,000,000 Typical Data link + TCP/IP net Overhead = 30% Typical maximum theoretical throughput then is 70% of available bandwidth These are the theoretical maximums. This assume you have the whole channel. Any other delay is typically host related. Hope this helps. -----Original Message----- From: fedora-list-bounces@xxxxxxxxxx [mailto:fedora-list-bounces@xxxxxxxxxx] On Behalf Of WipeOut Sent: Tuesday, April 06, 2004 6:40 AM To: For users of Fedora Core releases Subject: Re: 100Mbps Ethernet Speed/Efficiency Ow Mun Heng wrote: >Hi Guys, > >I'm wondering what's the maximum sustained transfer rate >that one can experience when using a 100Mbps link? > >Is there any way that I can determine what's the bottleneck? FYI, I'm >using iftop. > >Transferring files between 2 PCs, (laptop and Desktop) >I see like up to 20MB/s. > >Could this # be limited due to my slow HD? 4200rpm which hdparm -t (or >is it -T) gives ~26MB/s > >1mbps = 1024/8 bits = 1 MB/s (I know there's a conversion >but I'm forgetful) > > >Cheers, >Mun Heng, Ow > > > > > > > Without compression and overhead 100Mb/s transtales to about 12.5MB/s.. Of course that is the theoretical maximum.. If you add overhead and contention you will probbaly see an actual transfer of between 60Mb/s and 90Mb/s.. I am not sure how you have managed to see a throughput of 20MB/s on a 100Mb/s link.. Later.. -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
