Dear Melvin: Note that Globus Online does NOT move your data to systems you do not control.
Ian. On Oct 9, 2012, at 9:47 AM, gridftp user <gridftpu...@hotmail.com> wrote: > >> Hi Melvin, >> I recommend that you install Globus Connect > Multi-User - https://www.globusonline.org/gcmu/ and use Globus Online > (www.globusonline.org) to do the transfer. >> >> In case of > the transfer you mention below, if you add say '-p 4' or '-p 8' to the > globus-url-copy command line, you should get much better transfer rate. > That said, you should really be using Globus Online as it does > autotuning of the parameters to get good performance. >> >> Raj > > > Hi Raj, > > > > Thank you for taking the time to respond. Adding the -p switch made no real > difference: > > time globus-url-copy -v -p 8 file:/opt/120_GB_file.random > sshftp://172.22.10.206/home/test/bigfile.random > > > > real 17m34.074s > > user 0m3.116s > > sys 1m55.821s > > > I thought I must have managed to miss that in my reading, but that > information is unfortunately missing > from all of the on-line documentation that I've read over the past week. In > fact, even knowing what to look > for I am unable to find it mentioned in any site documentation at all. I did > find it by typing globus-url-copy > -help, which gives me some reading that I've not gone through yet. > > Any chance the lack of improvement is due to the fact that the traffic is > going out one server, through a > single switch, and back into the receiving server? I ask because I am not a > network engineer by any means > and I am trying to get an understanding of what is going on. If the > infrastructure is an issue then an outside > test is in order. > > I appreciate the suggestion of using Globus Online. We looked into that, but > we do not want our > data residing on systems we do not control, even if it is there for a short > time. That is why I am > trying so hard to set up a server/client system, so we can have almost > complete control over both > end-points and transfer parameters. > > I'll keep plugging away. > > Melvin > >
