NAME¶

pegasus-transfer - Handles data transfers in Pegasus workflows.

SYNOPSIS¶

pegasus-transfer [-h]


                   [--file inputfile]


                   [--threads number_threads]


                   [--max-attempts attempts]


                   [--debug]

DESCRIPTION¶

pegasus-transfer takes a list of url pairs, either on stdin or with an input file, determines the correct tool to use for the transfer and executes the transfer. Some of the protocols pegasus-transfer can handle are GridFTP, SRM, Amazon S3, HTTP, and local cp/symlinking. Failed transfers are retried.

Note that pegasus-transfer is a tool mostly used internally in Pegasus workflows, but the tool can be used stand alone as well.

OPTIONS¶

-h, --help

-f inputfile, --file inputfile

-m, --max-attempts attempts

-t, --threads number_threads

-d, --debug

EXAMPLE¶

$ pegasus-transfer
# src 1 local_site
file:///etc/hosts
# dst 1 local_site
file:///tmp/foo
CTRL+D

CREDENTIAL HANDLING¶

Credentials used for transfers can be specified with a combination of comments in the input file format and environment variables. For example, give the following input file:

# src 1 isi
gsiftp://workflow.isi.edu/data/file.dat
# dst 1 tacc_stampede
gsiftp://gridftp.stampede.tacc.utexas.edu/scratch/file.dat

pegasus-transfer will expect either one environment variable specifying one credential to be used on both end of the connection (X509_USER_PROXY), or two separate environment variables specifying two different credentials to be used on the two ends of the connection. The the latter case, the environment variables are derived from the site names provided in the input file commments. In the example above, the environment variables would be named X509_USER_PROXY_isi and X509_USER_PROXY_tacc_stampede

THREADING¶

In order to speed up data transfers, pegasus-transfer will start a set of transfers in parallel using threads. Threads are turned off when retrying failed transfers.

AUTHOR¶

Pegasus Team http://pegasus.isi.edu