NAME

       allpairs_master - executes All-Pairs workflow in parallel on distributed systems

SYNOPSIS

       allparis_master [options] <set A> <set B> <compare function>

DESCRIPTION

       allpairs_master  computes  the  Cartesian  product of two sets (<set A> and <set B>), generating a matrix
       where each cell M[i,j] contains the output of the function F (<compare function>)  on  objects  A[i]  (an
       item in <set A>) and B[j] (an item in <set B>). The resulting matrix is displayed on the standard output,
       one comparison result per line along with the associated X and Y indices.

       allpairs_master uses the Work Queue system to distribute tasks among processors.  Each processor utilizes
       the  allpairs_multicore(1)  program to execute the tasks in parallel if multiple cores are present. After
       starting allpairs_master, you must start a number of work_queue_worker(1) processes on  remote  machines.
       The workers will then connect back to the master process and begin executing tasks.

OPTIONS

       -p, --port=<port>
              The port that the master will be listening on.

       -e, --extra-args=<args>
              Extra arguments to pass to the comparison function.

       -f, --input-file=<file>
              Extra input file needed by the comparison function. (may be given multiple times)

       -o, --debug-file=<file>
              Write  debugging output to this file. By default, debugging is sent to stderr (":stderr"). You may
              specify logs be sent to stdout (":stdout"), to the system syslog (":syslog"), or  to  the  systemd
              journal (":journal").

       -O, ----output-file=<file>
              Write task output to this file (default to standard output)

       -t, --estimated-time=<seconds>
              Estimated time to run one comparison. (default chosen at runtime)

       -x, --width=<item>
              Width of one work unit, in items to compare. (default chosen at runtime)

       -y, --height=<items>
              Height of one work unit, in items to compare. (default chosen at runtime)

       -N, --project-name=<project>
              Report the master information to a catalog server with the project name - <project>

       -P, --priority=<integer>
              Priority. Higher the value, higher the priority.

       -d, --debug=<flag>
              Enable debugging for this subsystem. (Try -d all to start.)

        -v, --version
              Show program version.

        -h,--help <>
              Display this message.

       -Z, --port-file=<file>
              Select port at random and write it to this file.  (default is disabled)

        --work-queue-preferred-connection <connection>
              Indicate preferred connection. Chose one of by_ip or by_hostname. (default is by_ip)

EXIT STATUS

       On success, returns zero.  On failure, returns non-zero.

EXAMPLES

       Let's  suppose  you  have a whole lot of files that you want to compare all to each other, named a, b, c,
       and so on. Suppose that you also have a program named compareit that when invoked as compareit a  b  will
       compare files a and b and produce some output summarizing the difference between the two, like this:

                a b are 45 percent similar

       To use the allpairs framework, create a file called set.list that lists each of your files, one per line:

                a
                b
                c
                ...

       Because  allpairs_master  utilizes allpairs_multicore(1), so please make sure allpairs_multicore(1) is in
       your  PATH  before  you  proceed.To   run   a   All-Pairs   workflow   sequentially,   start   a   single
       work_queue_worker(1) process in the background. Then, invoke allpairs_master.

                % work_queue_worker localhost 9123 &
                % allpairs_master set.list set.list compareit

       The  framework  will  carry out all possible comparisons of the objects, and print the results one by one
       (note that the first two columns are X and Y indices in the resulting matrix):

                1   1    a a are 100 percent similar
                1   2    a b are 45 percent similar
                1   3    a c are 37 percent similar
                ...

       To  speed  up  the  process,  run  more  work_queue_worker(1)  processes  on  other  machines,   or   use
       condor_submit_workers(1)  or  sge_submit_workers(1)  to  start  hundreds  of  workers in your local batch
       system.

       The following is an example of adding  more  workers  to  execute  a  All-Pairs  workflow.  Suppose  your
       allpairs_master  is  running  on  a  machine  named  barney.nd.edu.  If you have access to login to other
       machines, you could simply start worker processes on each one, like this:

                % work_queue_worker barney.nd.edu 9123

       If you have access to a batch system like Condor, you can submit multiple workers at once:

                % condor_submit_workers barney.nd.edu 9123 10
                Submitting job(s)..........
                Logging submit event(s)..........
                10 job(s) submitted to cluster 298.

COPYRIGHT

       The Cooperative Computing Tools are Copyright (C) 2003-2004 Douglas Thain and Copyright (C) 2005-2015 The
       University  of  Notre  Dame.  This software is distributed under the GNU General Public License.  See the
       file COPYING for details.

SEE ALSO

       •   The Cooperative Computing Tools ("http://ccl.cse.nd.edu/software/manuals")

       •   All-Pairs User Manual ("http://ccl.cse.nd.edu/software/manuals/allpairs.html")

       •   Work Queue User Manual ("http://ccl.cse.nd.edu/software/manuals/workqueue.html")

       •   work_queue_worker(1)

       •   condor_submit_workers(1)

       •   sge_submit_workers(1)

       •   allpairs_multicore(1)