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Full Discussion: search a number in very very huge amount of data
Top Forums Shell Programming and Scripting search a number in very very huge amount of data Post 302578843 by Corona688 on Friday 2nd of December 2011 12:37:41 PM
Old 12-02-2011
Unless you've got a blindingly fast RAID setup, "hours" is to be expected for 10 terabytes no matter what you do.

That's a useless use of ls *.

You don't want 9 processes writing to the same file at the same time. They may interfere with each other, overwriting each others' lines, etc.

It's looking for the string 'variable' because you put it in //, just give it the variable. You didn't even name it 'variable' though, you named it 'var'. Try $2 ~ var

In summary, I'd do this:

Code:
zcat * | awk -F"|" -v var="$1" '$2 ~ var' > output.txt

Depending on whether your disk's faster than your processor or vice versa, there may be ways to speed this up by running multiple gunzip's at once. I'm not sure how to do that yet but I'll think about it.
 

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LEARN ABOUT OPENSOLARIS

search.h

search.h(3HEAD) 						      Headers							   search.h(3HEAD)

NAME

       search.h, search - search tables

SYNOPSIS

       #include <search.h>

DESCRIPTION

       The <search.h> header defines the ENTRY type for structure entry, which includes the following members:

	 char *key
	 void *data

       and defines ACTION and VISIT as enumeration data types through type definitions as follows:

	 enum { FIND, ENTER } ACTION;
	 enum { preorder, postorder, endorder, leaf } VISIT;

       The size_t type is defined as described in <sys/types.h>. See types.h(3HEAD).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       hsearch(3C), insque(3C), lsearch(3C), tsearch(3C), types.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    10 Sep 2004 						   search.h(3HEAD)
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