All releases of GNU Parallel
Release Notes: --ctrlc is now the default if --pipe is not used, making it possible to kill remotely-started jobs simply by pressing Ctrl-C. --timeout 200% now means "kill jobs which take more than twice the time of the median runtime of a job". Jobs are now distributed round-robin when having mulitiple --sshlogin, instead of filling up one --sshlogin at a time.
Release Notes: The software can now be installed in 10 seconds by running wget -O - pi.dk/3 | sh. CPU detection was added for HURD, IRIX, SCO OpenServer, and HPUX. --ctrlc will send SIGINT to tasks running on remote computers and thus kill them. --load now uses 'ps' to find the number of running processes instead of 'uptime' and is much faster. CentOS 3.9 and FreeBSD 7 compatibility bugs were fixed. Some of these required quite extensive changes, making this release beta quality. --retries now works with --onall. The new --load computation now works on FreeBSD 7. --nice works under tcsh.
Release Notes: --resume works with --pipe. --resume-failed will go through --joblog, redo the failed jobs, and then continue like --resume. Negative positional arguments count from the end: {-1} means the last argument, {-2} the second to last. NetBSD CPU detection. --blocksize increases exponentially if it smaller than a full record. Processing n-line records (--pipe -L n) is now much faster. --tollef is obsoleted after discussion on the mailing list.
Release Notes: --sshdelay delays starting the next SSH by the specified number of seconds. The value can be less than 1 second.
Release Notes: --shebang-wrap now makes it possible to parallelize scripts by putting "parallel" in the shebang line (the first #! line in scripts). --delay adds a delay after starting each job (useful to avoid raceconditions and thundering herd problems). --results now uses "/" as a separator instead of TAB, and thus creates subdirectories. OpenBSD CPU detection is now performed. niceload --sensor allows negative numbers to signify a lower number, meaning the limit is lower. niceload --prg suspends a named program which is already running. niceload multiple --pid suspends process ids which are already running.
Release Notes: niceload --sensor makes it possible to use a program to control whether a program should be suspended.
Release Notes: --results now structures output files so that they can be imported using Pandas (http://pandas.pydata.org/). This is useful when doing simulations to select output from some arguments. --env can be used to transfer environment variables through ssh to remote machines.
Release Notes: Due to a bugfix, the main flow has changed, making this release beta quality.
Release Notes: This is a bugfix release with no new features. It is probably a good release for stable long-term use.
Release Notes: '-L n --pipe' will use records of n lines. This is useful when processing data that have fixed records with a fixed number of lines (e.g. fastq). --filter-hosts will remove down hosts. For each remote host, the program checks that login through ssh works. If not, the host will not be used. Currently you can not put --filter-hosts in a profile, $PARALLEL, /etc/parallel/config, or similar. --pipe now uses fork() instead of busy wait. The performance should be better on computers with more than 10 cores while remaining the same on computers with fewer cores.
