When I uncomment lines 3-5, this code doesn't work. Why? When I uncomment the last 5 lines, it works. Is Storable the correct approach here? I'm going to write a hash to disk that will act like a miniature database. What should I read to learn more about persistent data structures? 
use strict;
my %testline;
# use DB_File;
# tie (%testline, 'DB_File', 'testline.db', O_RDWR|O_CREAT,
#   0666, $DB_BTREE) or die "Cannot tie:$!";
 
push @{ $testline{a} }, {
                          uri   => 'http://',
                          name  => 'barney',
                          state => 'MI'
                        };
push @{ $testline{a} }, {
                          uri   => 'ftp://',
                          name  => 'jade',
                          state => 'NM'
                        };
 
# use Storable;
# store \%testline, 'filetest';
# my $hashref = retrieve('filetest');
# use Data::Dumper;
# print Data::Dumper->Dump([$hashref],['hashref']);

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In reply to Limits of DB_File with Btree algorithm by meonkeys

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