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Top Forums Shell Programming and Scripting Creating instances of a program Post 72847 by tushar_johri on Wednesday 25th of May 2005 02:53:50 AM
Old 05-25-2005
Creating instances of a program

Hi,
Presently I have script #!/bin/ksh in which 4 executables are executed
as 1,2,3 and 4.Executable 2 is an extract program which extracts records from a table.and executable 4 is a program that updates a database.
Currenlty this process takes a hell lot of time and my aim is to reduce the overall execution time.
Smilie I want to change executable 2 to process only say 100 records.Suppose there 500 records in a database,I want to run 5 instances of executable 2 in parallel.I also want to make use of these 5 instances to update my database by passing the output of each of the 5 instances to executable 4.In other words,I also want to split executable 4 into same number of instances as executable 2.

Smilie I have another problem here :
I want to merge the output files of 5 sub program ,attach a header and trailer and then FTP it.Is this going to be time consuming ?

Can anybody help me how it is possible ? Is this approach correct to cut down the timing of the entire process ?
Please advise.
Thanks
Unixcurious

Link removed

Last edited by Perderabo; 05-25-2005 at 11:33 AM.. Reason: Remove link
 

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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe name ... DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /usr/bin/gdb'' it will create the following two files: -rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb -rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~ /usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file. You can remove /usr/bin/gdb~ once you are sure that /usr/bin/gdb works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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