| chirp_stream_files(1) | Cooperative Computing Tools | chirp_stream_files(1) |
chirp_stream_files - move data to/from chirp servers in parallel
chirp_stream_files [options] <copy|split|join> <localfile> { <hostname[:port]> <remotefile>
chirp_stream_files is a tool for moving data from one machine to and from many machines, with the option to split or join the file along the way. It is useful for constructing scatter-gather types of applications on top of Chirp.
chirp_stream_files copy duplicates a single file to multiple hosts. The <localfile> argument names a file on the local filesystem. The command will then open a connection to the following list of hosts, and stream the file to all simultaneously.
chirp_stream_files split divides an ASCII file up among multiple hosts. The first line of <localfile> is sent to the first host, the second line to the second, and so on, round-robin.
chirp_stream_files join collects multiple remote files into one. The argument <localfile> is opened for writing, and the remote files for reading. The remote files are read line-by-line and assembled round-robin into the local file.
In all cases, files are accessed in a streaming manner, making this particularly efficient for processing large files. A local file name of - indicates standard input or standard output, so that the command can be used in a pipeline.
List any environment variables used or set in this section.
On success, returns zero. On failure, returns non-zero.
To copy the file mydata to three locations:
% chirp_stream_files copy mydata server1.somewhere.edu /mydata
server2.somewhere.edu /mydata
server2.somewhere.edu /mydata
To split the file mydata into subsets at three locations:
% chirp_stream_files split mydata server1.somewhere.edu /part1
server2.somewhere.edu /part2
server2.somewhere.edu /part3
To join three remote files back into one called newdata:
% chirp_stream_files join newdata server1.somewhere.edu /part1
server2.somewhere.edu /part2
server2.somewhere.edu /part3
The Cooperative Computing Tools are Copyright (C) 2022 The University of Notre Dame. This software is distributed under the GNU General Public License. See the file COPYING for details.
| CCTools 7.13.1 FINAL |