Dear Don:
Thank you very much for the detailed report.
We'll follow up separately on the code patches.
On the performance front: I know nothing about your configuration, but I can
imagine that you might be able to do even better. Would you be interested in
having us work with you on identifying the bottleneck(s)?
Regards -- Ian.
On Aug 13, 2010, at 1:04 PM, Don Gilbert wrote:
>
> Dear Globus folks,
> (maybe this should go to -dev rather than -user)
>
> We have been testing GridFTP + UDT (gt5.0.2) for the Bio-mirror.net project,
> which daily mirrors 100's of GB of biology data around the world. The results
> so far are very good. There have been some installation problems, and
> I have code patches if you want them. A few of these I think would be
> usefully added to a future GridFTP release.
>
> - Don Gilbert
>
> Summary of GridFTP (gt5.0.2) patches
> -- UDT change udt4/src/channel.cpp for Solaris10:
> add UNIX to ifdef BSD, OSX for setsockopt max buffer
> -- UDT globus configure{.ac}: update for *solaris* and *darwin* flags
> (always compiles with -DLINUX otherwise, also fails to configure
> on Linux-Powerpc, were it tries assembly for wrong processor)
>
> -- gridftp server, anonymous ftp directories: limit to anonymous user
> home dir
> in globus_i_gfs_control.c:globus_l_gfs_get_full_path() : add anon_user
> path restrictions
> (I tried chroot() first but that was overly complex to decipher).
>
> -- gridftp server: log_transfers, UDT client IP was 0.0.0.0 always
> globus_i_gfs_data.c:globus_l_gfs_data_end_transfer_kickout() : small
> patch
>
> -- globus-url-copy: set dest file timestamp to match source file time
> (essential for -sync, usual FTP practice)
> globus_url_copy.c: add globus_l_set_dest_timestamp() and add int
> src_mtime
> in globus_l_guc_src_dst_pair_t and globus_l_guc_transfer_t structures
>
> Here are our results to date, with testing still in progress.
> GridFTP TCP and UDT times for 113 GB transfer
> from Bio-mirror.net (Indiana USA)
>
> Ping Time(min) TCP/ Distance
> Site RTT TCP UDT UDT Km Network Route
> --------------------------------------------------------------
> NCSA 10 139 138 1 200 Indiana - U of Illinois - NCSA
> 13.9 13.9 Megabytes/sec
> Purdue 17 125 125 1 500 In. - Chicago - Purdue, Indiana
> 15.3 15.3 Mb/sec
> ORNL 25 361 120 3 1200 In. - Chi. - Nashv., Tennesee - ORNL
> 5.3 15.9 Mb/sec
> TACC 37 616 120 5 2000 In. - Chi. - Huston, Texas - TACC
> 3.1 15.9 Mb/sec
> SDSC 65 -- -- - 3300 In. - Chi. - LA, California - SDSC
> ...
> CSTNET 274 -- -- 14 12000 In. - Michigan - Kreonet, Korea -
> Beijing, China
> 0.48 6.67 Mb/sec (from preliminary 3GB test)
> --------------------------------------------------------------
> Transfer times (minutes), and below speed in Megabytes/second,
> for TCP and UDT, and the TCP/UDT ratio.
> NCSA, Purdue, ORNL, TACC, SDSC are Teragrid.org sites in USA.
> Land/sea line distance is given in Km.
> RTT is network distance as average round trip ping time in ms.
> TCP and UDT transfers were run simultaneously from each site.
>
> -- d.gilbert--bioinformatics--indiana-u--bloomington-in-47405
> -- gilbe...@indiana.edu -- http://marmot.bio.indiana.edu/
>
