Overview

This page will introduce you to transferring files using HTCondor's built-in transfer mechanisms. HTCondor has a built-in mechanism to transfer binaries and files to and from compute nodes. If you have relatively small amounts of data and binaries to transfer (<1 Gigabyte/job) then this mechanism can be effective.

Preliminaries

Login to login.osgconnect.org and get a copy of the tutorial files:

$ ssh login.osgconnect.org
$ tutorial htcondor_transfer
$ cd tutorial-htcondor_transfer

Word Distribution Example

This example will use the HTCondor transfer mechanisms to transfer a binary (distribution) and a file with a list of words (random_words) to compute nodes that are running the jobs. Create the condor file transfer.submit:

universe = vanilla
notification=never
executable = app_script.sh
output = logs/transfer.out.$(Process)
error = logs/transfer.err.$(Process)
log = logs/transfer.log

transfer_input_files = distribution, random_words
ShouldTransferFiles = YES
when_to_transfer_output = ON_EXIT

queue 50

The key parts of the submit file are under the transfer_input_files parameter that gives a comma separated list of paths to the files that will be transferred. In addition, ShouldTransferFiles needs to be set to YES and when_to_transfer_output needs to be set to ON_EXIT in order to make sure that the HTCondor will return the output.

path warning: You must run condor_submit in the same directory that you created the files and directories in. Otherwise HTCondor will give you an error due to not being able to find the distribution and random_words files

Now submit the job:

$ condor_submit transfer.submit

When the jobs are completed, verify the output:

$ cat logs/transfer.out.0
Ashkenazim |45 (0.44%) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
BIOS       |45 (0.44%) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Anaheim    |44 (0.43%) +++++++++++++++++++++++++++++++++++++++++++++++++++++++
Aymara     |44 (0.43%) +++++++++++++++++++++++++++++++++++++++++++++++++++++++
Arthurian  |43 (0.42%) ++++++++++++++++++++++++++++++++++++++++++++++++++++++
Anaxagoras |43 (0.42%) ++++++++++++++++++++++++++++++++++++++++++++++++++++++
Bactria    |43 (0.42%) ++++++++++++++++++++++++++++++++++++++++++++++++++++++
Alexis     |43 (0.42%) ++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ariel      |43 (0.42%) ++++++++++++++++++++++++++++++++++++++++++++++++++++++
Aubrey     |42 (0.41%) +++++++++++++++++++++++++++++++++++++++++++++++++++++
Baryshnikov|42 (0.41%) +++++++++++++++++++++++++++++++++++++++++++++++++++++
Bahia      |42 (0.41%) +++++++++++++++++++++++++++++++++++++++++++++++++++++
Angstrom   |42 (0.41%) +++++++++++++++++++++++++++++++++++++++++++++++++++++
Asoka      |42 (0.41%) +++++++++++++++++++++++++++++++++++++++++++++++++++++
Alcatraz   |41 (0.40%) ++++++++++++++++++++++++++++++++++++++++++++++++++++

Getting Help

For assistance or questions, please email the OSG User Support team at user-support@opensciencegrid.org or visit the help desk and community forums.

This page was updated on Dec 15, 2019 at 02:00 from tutorials/tutorial-htcondor-transfer/README.md.