maybe, just maybe you can use Cache::SharedMemoryCache

have one program that that stays running to hold the cache in memory while other programs come and go.

# holdcache.pl

use Cache::SharedMemoryCache;
my %cache_options_= (
  'namespace' => 'MyNamespace',
);
my $c = Cache::SharedMemoryCache->new( \%cache_options )
  or die( "Couldn't instantiate SharedMemoryCache" );

while (1) { sleep 300; }

__END__
[download]

should do to keep the cache open.

$ perl holdcache.pl &

$ perl -e 'use Cache::SharedMemoryCache;$c=Cache::SharedMemoryCache->n
+ew({namespace=>"MyNamespace"}) or die;$c->set("foo",1);'

$ perl -e 'use Cache::SharedMemoryCache;$c=Cache::SharedMemoryCache->n
+ew({namespace=>"MyNamespace"}) or die;$x=$c->get("foo");print $x,$/'
1
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presto!

I recommend you use Cache::FileCache instead of Cache::SharedMemoryCache. The file cache is much faster. If you want to go even faster, Cache::Mmap is a good choice.

Use FileCache, then its persistent.

Is there a way for me to make it persistent?

Uh... no. You could get a close approximation by using FileCache and a RAM disk.

-sauoq
"My two cents aren't worth a dime.";