GNU Parallel 20160122 ('Bowie') released

[ole....@gmail.com]

GNU Parallel 20160122 ('Bowie') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

Haiku of the month:

Dash dash pipe too slow?
Dash dash pipepart is your friend.
Use GNU Parallel
-- Ole Tange

New in this release:

* --sql DBURL uses DBURL as storage for jobs and output. It does not run any jobs so it requires at least one --sqlworker. DBURL must point to a table.

* --sqlworker DBURL gets jobs from DBURL and stores the result back to DBURL.

* --sqlandworker is a shorthand for --sql and --sqlworker.

* --sqlworker requires the output of a single job to fit in memory.

* --results now also saves a file called 'seq' containing the sequence number.

* If $PARALLEL_ENV is a file, then that file will be read into $PARALLEL_ENV.

* man parallel_tutorial has been given an overhaul.

* --workdir now accepts replacementstrings.

* GNU Parallel was cited in: Possum - A Framework for Three-Dimensional Reconstruction of Brain Images rfom Serial Sections http://link.springer.com/article/10.1007/s12021-015-9286-1

* GNU Parallel was cited in: A Genetic Algorithm for the selection of structural MRI features for classification of Mild Cognitive Impairment and Alzheimer's Disease https://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=7359909

* GNU Parallel was cited in: The Effect of Domain Modeling on Performance of Planning Algorithms http://isaim2016.cs.virginia.edu/papers/ISAIM2016_Bartak_Vodrazka.pdf

* Plotting time tables for jobs run by GNU Parallel https://github.com/ziotom78/plot_joblog

* GNU Parallel was used in: Mission Impossible: you have 1 minute to analyze the Ebola Genome https://www.biostars.org/p/119397

* GNU Parallel is used in LAST: http://last.cbrc.jp/

* Distributed Log Search Using GNU Parallel http://codehate.com/blog/2015/12/01/distributed-log-search-using-gnu-parallel/

* Bug fixes and man page updates.

GNU Parallel - For people who live life in the parallel lane.


= About GNU Parallel =

GNU Parallel is a shell tool for executing jobs in parallel using one or more computers. A job is can be a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables. A job can also be a command that reads from a pipe. GNU Parallel can then split the input and pipe it into commands in parallel.

If you use xargs and tee today you will find GNU Parallel very easy to use as GNU Parallel is written to have the same options as xargs. If you write loops in shell, you will find GNU Parallel may be able to replace most of the loops and make them run faster by running several jobs in parallel. GNU Parallel can even replace nested loops.

GNU Parallel makes sure output from the commands is the same output as you would get had you run the commands sequentially. This makes it possible to use output from GNU Parallel as input for other programs.

You can find more about GNU Parallel at: http://www.gnu.org/s/parallel/

You can install GNU Parallel in just 10 seconds with: (wget -O - pi.dk/3 || curl pi.dk/3/) | bash

Watch the intro video on http://www.youtube.com/playlist?list=PL284C9FF2488BC6D1

Walk through the tutorial (man parallel_tutorial). Your commandline will love you for it.

When using programs that use GNU Parallel to process data for publication please cite:

O. Tange (2011): GNU Parallel - The Command-Line Power Tool, ;login: The USENIX Magazine, February 2011:42-47.

If you like GNU Parallel:

* Give a demo at your local user group/team/colleagues
* Post the intro videos on Reddit/Diaspora*/forums/blogs/ Identi.ca/Google+/Twitter/Facebook/Linkedin/mailing lists
* Get the merchandise https://www.gnu.org/s/parallel/merchandise.html
* Request or write a review for your favourite blog or magazine
* Request or build a package for your favourite distribution (if it is not already there)
* Invite me for your next conference

If you use GNU Parallel for research:

* Please cite GNU Parallel in you publications (use --bibtex)

If GNU Parallel saves you money:

* (Have your company) donate to FSF https://my.fsf.org/donate/


= About GNU SQL =

GNU sql aims to give a simple, unified interface for accessing databases through all the different databases' command line clients. So far the focus has been on giving a common way to specify login information (protocol, username, password, hostname, and port number), size (database and table size), and running queries.

The database is addressed using a DBURL. If commands are left out you will get that database's interactive shell.

When using GNU SQL for a publication please cite:

O. Tange (2011): GNU SQL - A Command Line Tool for Accessing Different Databases Using DBURLs, ;login: The USENIX Magazine, April 2011:29-32.


= About GNU Niceload =

GNU niceload slows down a program when the computer load average (or other system activity) is above a certain limit. When the limit is reached the program will be suspended for some time. If the limit is a soft limit the program will be allowed to run for short amounts of time before being suspended again. If the limit is a hard limit the program will only be allowed to run when the system is below the limit.