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28 lines
679 B
Markdown
28 lines
679 B
Markdown
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# GNU Parallel
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> Run commands on multiple CPU cores
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- gzip several files at once, using all cores
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`parallel gzip ::: {{file1}} {{file2}} {{file3}}`
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- read arguments from stdin, run 4 jobs at once
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`ls *.txt | parallel -j4 gzip`
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- Convert JPG images to PNG using replacement strings
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`parallel convert {} {.}.png ::: *.jpg`
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- parallel xargs, cram as many args as possible onto one command
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`{{args}} | parallel -X {{command}}`
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- break stdin into ~1M blocks, feed each block to stdin of new command
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`cat {{bigfile.txt}} | parallel --pipe --block 1M {{command}}`
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- run on multiple machines via SSH
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`parallel -S {{machine1}},{{machine2}} {{command}} ::: {{arg1}} {{arg2}}`
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