#!/usr/bin/perl -w
use Storable qw( freeze thaw );
use DB_File;
use strict;

my %hash = (
 1 => { desc   => 'fat',
        states => 'WA OR ID CA',
        open   => '0',
        narm   => '1',
      },
 2 => { desc   => 'fatter',
        states => 'NATIONWIDE OR ID CA',
        open   => '1',
        narm   => '0',
      },
);

my $frozen = freeze \%hash;

my %table;

tie (%table, 'DB_File', 'planners.db', O_RDWR|O_CREAT,
  0666, $DB_BTREE) or die "Cannot tie: $!";

%table = (
  planners => $frozen,
);

untie %table;

[download]

%table will be used to generate HTML pages throughout a website, and could grow to 5 key/value pairs. %hash would get up to a maximum of 200 key/value pairs. I want to keep %table alive in memory (I'm using mod_perl), and unfreeze/uncompress the values as I need them. Would Compress::Zlib work to keep %table's size in memory to a minimum? Is there another way that I can keep %table very small in memory, assuming CPU is not a bottleneck?

In reply to Compression of a mini-database in memory by meonkeys

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