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Saturday, November 21st 2009 01:59:01 PM PST
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How to Transfer Files on Triton Resource
Several tools are available on Triton to assist users in moving their data between filesystems and other resources. For files over two gigabytes in size, the best option is bbftp, which uses multi-threading to maximize throughput over the 1-gigabit network connection. Tests have achieved between 60 and 100 megabytes per second using this method.
Other methods include scp, sftp, bbcp and globus-url-copy. Links to the bbcp and bbftp documentation are in the Related Links section of this page, and scp and sftp are documented in the Linux manual.
Overview of BBFTP
To use bbftp, you need both a client and a server.
- Client — a client is installed on Triton at /opt/bbftpc/bin/bbftp
- Server — the service is available at SDSC from
- tg-login.sdsc.edu
- tg-login1.sdsc.edu
- tg-login2.sdsc.edu
Use the -s option to invoke a remote host for bbftpd. You will be prompted for a password on this host (see example below). Please note we have experienced problems using a Korn shell in this context. We recommend tcsh.
Here is the basic syntax for bbftp
bbftp
displays a brief help message
bbftp -v
displays version info
bbftp [Options] [-u RemoteUsername] -i ControlFile [RemoteHost]
bbftp [Options] [-u RemoteUsername] -e ControlCommands [RemoteHost]
requests the execution of commands contained in the control file ControlFile or the ControlCommands command string, using RemoteUsername on RemoteHost as the service
See the bbftp documentation for complete details.
Example session for bbftp
Here is an example of a bbftp session. In this example, the file HOMA.tar is being copied from GPFS-WAN to the ariel user's /mirage file space on Triton, using the remote bbftp daemon from tg-login2.
[someuser@login-4-0 TEMP]% /opt/bbftpc/bin/bbftp -s -e 'get /gpfs/projects/someuser/KRAKEN/HOMA.tar /mirage/ariel/TEMP/HOMA.tar' -u someuser -p 2 -V tg-login2.sdsc.edu
Password: <someuser's password on tg-login2>
>> COMMAND : get /gpfs/projects/someuser/KRAKEN/HOMA.tar /mirage/ariel/TEMP/HOMA.tar
<< OK
4299427840 bytes got in 36.7 secs (1.14e+05 Kbytes/sec or 894 Mbits/s)
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