06-07-2011
grep first occurrence but continue to next entry in patternfile
I have 1300 files (SearchFiles0001.txt, SearchFiles0002.txt, etc.) , each with 650,000 lines, tab-delimited data.
I have a pattern file, with about 1000 lines with a single word. Each single word is found in the 1300 files once.
If I grep -f PatternFile.txt SearchFiles*.txt >OutputFile.txt
the search takes forever, because it searches 650,000 lines x 1300 files for each of the 1000 words.
If I grep -f PatternFile.txt -m 1 SearchFiles*.txt >OutputFile.txt
the search stops after the first line of PatternFile.txt, and I get an OutputFile.txt with 1300 lines: the first entry of PatternFile.txt, but none of the other 999.
How do I make the search faster (by finding the first occurrence of my search parameter, and then moving on to the next search parameter in PatternFile.txt)?
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LEARN ABOUT DEBIAN
ecaccess-file-move
ECACCESS-FILE-MOVE(1p) User Contributed Perl Documentation ECACCESS-FILE-MOVE(1p)
NAME
ecaccess-file-move - Move or Rename ECaccess Files
SYNOPSIS
ecaccess-file-move -version|-help|-manual
ecaccess-file-move [-debug] source-ecaccess-file target-ecaccess-file
DESCRIPTION
Allow moving an ECaccess File. When the move occurs within the same ECaccess File System then it is a rename. When the move occurs across
two different ECaccess File Systems then first a copy is done and then a delete of the original file is done (e.g. similar to ecaccess-
file-copy ... -erase).
The source-ecaccess-file and target-ecaccess-file are in the form [domain:][/user-id/]path. Please read the "Shell commands -> File
Management" section of the "ecaccess" guide for more information on the ECaccess File System.
ARGUMENTS
source-ecaccess-file
The source ECaccess File name.
target-ecaccess-file
The target ECaccess File name.
OPTIONS
-version
Display version number and exits.
-help Print a brief help message and exits.
-manual Prints the manual page and exits.
-debug Display the SOAP messages exchanged.
EXAMPLES
ecaccess-file-move ec:test1.txt ec:test2.txt
Rename the test1.txt file in the ECFS directory of the authenticated user in test2.txt.
ecaccess-file-move ec:test1.txt home:test2.txt
Copy the test1.txt file from the ECFS directory of the authenticated user to the test2.txt file in the $HOME directory of the authenticated
user, then delete the test1.txt file from ECFS.
SEE ALSO
ecaccess-file-delete, ecaccess-file-get, ecaccess-file-mget, ecaccess-file-modtime, ecaccess-file-mput, ecaccess-file-rmdir, ecaccess-file-
copy, ecaccess-file-dir, ecaccess-file-mdelete, ecaccess-file-mkdir, ecaccess-file-chmod, ecaccess-file-put, ecaccess-file-size and
ecaccess.
perl v5.14.2 2012-04-16 ECACCESS-FILE-MOVE(1p)