On Tuesday 13 March 2007, Anders Johansson wrote: > Am Dienstag, den 13.03.2007, 09:50 -0900 schrieb John Andersen: > > I just copied a 350meg iso across 100mbit network via samba in under 10 > > minutes. > > It pegged my linux nic at 7.4 meg for the duration according to gkrellm. > > I normally see 10M traffic in gkrellm when I copy stuff to and from my > nfs server
All the more reason to suspect the OP has network problems. But I have slow disks. Perhaps thats why 7.4 was the fastest my gkrellm showed. Heck, one of my machines was an ancient dual celeron and I still was faster than his reported results. And my switch, while saying 10/100 on the front can not necessarily sustain that packet forwarding rate for long durations. You'd be amazed (or perhaps you wouldn't) how often a supposedly 100meg switch can not actually manage that transfer rate for more than a brief periods. > > So i would put that file on flat disk space (no raid) and > > copy it with samba to see if the problem is in the disk > > or the network. You definitely want to get sftp out of the picture. > > Two comments to this: first of all, it would have exactly no effect on > the data seen in e.g. gkrellm (unless you have very slow cpus), since it > measures bits on the wire, not data received by the application Not sure what that has to do with it. I timed this movement by my watch, not gkrellm. > Secondly, don't be so quick to discount ssh file transfers. It is heavy > on the cpu, but it can even be quicker than plaintext to transfer data > if the cpu can keep up. The encryption also does some level of > compression, and I haven't been disappointed by the performance so far How much compression would you expect on an iso? Have you tried to move a 650meg iso across nfs, and then do the same move across ssh from and to the same source/destination? I think you will find that on local networks where nothing is less than 100meg that ssh is quite a bit slower than a well tuned nfs. Samba is supposedly not as fast as nfs, but I've found it still is pretty swift compared to ssh transfers. -- _____________________________________ John Andersen
pgpV6gfDMQu1x.pgp
Description: PGP signature
