in reply to compressing VERY LARGE files

Why didn't Compress::Gzip didn't work for you? Study this example from the documentation: 
use strict ;
use warnings ;

use Compress::Zlib ;

binmode STDOUT;     # gzopen only sets it on the fd

my $gz = gzopen(\*STDOUT, "wb")
    or die "Cannot open stdout: $gzerrno\n" ;

while (<>) {
    $gz->gzwrite($_)
        or die "error writing: $gzerrno\n" ;
}

$gz->gzclose ;

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though if it is binary data being input you probably want to read your input instead.

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Re: Re: compressing VERY LARGE files
by gnu@perl (Pilgrim) on Sep 27, 2002 at 12:28 UTC
    Thanks. It would seem that I didn't think past the obvious when reading the doc on Compress::Gzip. This would work fine, but I think that I am going to do what was suggested and just look for whatever compress program has been loaded onto the box. This way I can check for bzip2 then gzip and if all else fails just use compress.

    This should allow me to use whatever the better compression binary is no matter what system I am on. I won't need to worry if the so-and-so libraries are on the destination machine or not.

    Thanks for your solution. I am positive I will be using it in another project in the near future here.

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