CODEWITHSUNDEEP
linuxterminalallocation
CheeHow
CheeHow

Reputation: 915

Assign CPU and memory to a Linux command in shell script

I have a command which is checkReplace test.txt and would like to assign more CPU and memory to this line of command (which I wrote it in a shell script for automation). Since the test.txt could be huge (10GB etc), anyone here could kindly suggest me how to increase the CPU and memory allocation to this command so as to increase the writing speed of test.txt (I suppose). Kindly advice, thanks

Upvotes: 0

Views: 2082

Answers (2)

scai
scai

Reputation: 21509

If checkReplace is a shell script then re-writing it in another scripting language (python, perl, ruby, ...) or in a real programming language would significantly improve it's speed. Shell scripts are mainly for simple tasks. But if you need heavy computations or I/O operations they are usually way to inefficient.

Upvotes: 2

faazshift
faazshift

Reputation: 485

You can start the command with higher CPU priority by simply starting it with the nice command, like so:

# nice -n -20 checkReplace test.txt

The highest possible priority is -20, with the default being 0. However, unless you're running other heavily CPU intensive processes, I can't imagine increasing CPU priority of a process will help it write to disk too much faster. That depends largely on hard drive write speeds, etc.

Upvotes: 2

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