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Full Discussion: Shell script failing to read large Xml record-urgent critical help
Top Forums UNIX for Advanced & Expert Users Shell script failing to read large Xml record-urgent critical help Post 302204695 by bakunin on Thursday 12th of June 2008 09:24:25 AM
Old 06-12-2008
To give you sound advice it would be necessary to know what the script is, what your input data is and what your desired output is. Post it here (not *all* the data, just a significant sample) and we will think about it.

Lacking any info the best we can do is tell you some generalized hints which may or may not help in your specific case. Here is one: Probably the several sed-calls could be combined to one single script if they are piped one into another. This might speed things considerably.

Another one: maybe you are doing something context-oriented. sed is poor in that and maybe some of its shortcomings are covered by shell constructs. If this is the case you might be better of writing the whole in awk, which will be slower than sed in what sed can do well, but faster than sed and some shell constructs connected in a pipeline.

(For instance: if you try to cut out some part of every line sed is probably faster than then often-seen "awk '{print $5}'", but if the part you are cutting is a number and you want all these numbers totalled at the end than awk is quite better than cutting with sed and adding in a shell loop.)

bakunin
 

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LEARN ABOUT DEBIAN

maria-vis

MARIA-VIS(1)						      General Commands Manual						      MARIA-VIS(1)

NAME

       maria-vis - graph visualization script for maria

SYNOPSIS

       maria-vis

DESCRIPTION

       This manual page documents briefly the maria-vis command.

       maria-vis  is  a  lefty script invoked by maria in order to visually present information to the user.  The script reads commands and direc-
       tives from standard input and may write maria query language commands to standard output.  An end-of-file condition on standard input  ter-
       minates the script.
       The  script is built on top of the dotty script that is part of the GraphViz package.  The commands prefixed with visual in maria issue two
       kinds of commands to this script: new(); or add(); followed by a newline character and a graph definition in the dot input  language.   The
       new  function  in the script displays the graph in a new window, while the add function copies information from the graph to the last modi-
       fied graph.

SEE ALSO

       dot(1), dotty(1), lefty(1), maria(1).

AUTHOR

       This manual page was written by Marko Makela <msmakela@tcs.hut.fi>.  The maria-vis script and the visualization option  were  designed  and
       implemented by Marko Makela.  Please see the copyright file in /usr/share/doc/maria for details.

								  August 10, 2001						      MARIA-VIS(1)
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