Net::DNSServer::DBMCache

Net::DNSServer::DBMCache is a reliable and efficient AnyDBM_File DNS cache resolver. This software provides the excellent functionality of caching DNS responses for smoother performance and faster access without having to rely solely on the main DNS server.

To use Net::DNSServer::DBMCache, you simply need to add the following code to your Perl script:

#!/usr/bin/perl -w -T
use strict;
use Net::DNSServer;
use Net::DNSServer::DBMCache;

Then, you can create a new object for the resolver and customize it to fit your needs. For instance:

my $resolver1 = new Net::DNSServer::DBMCache {
dbm_file => "/var/named/dns_cache.db",
dbm_reorder => [qw(DB_File GDBM_File NDBM_File)],
fresh => 1,
};

Furthermore, you can specify multiple resolver objects and run them through priority-based logic:

my $resolver2 = ... another resolver object ...;
run Net::DNSServer {
priority => [$resolver1,$resolver2],
};

Net::DNSServer::DBMCache is a Net::DNSServer::Base extension that ensures secure sharing of DNS cache data across various processes. With a locking mechanism in place, the AnyDBM_File storage supports high-level functioning while minimizing risks of data loss, and offloading the cache onto disk effectively precludes bloated memory usage.

An important benefit of this module is the TTL compliance feature: the system caches DNS queries for a certain period of time, waiting for new ones to come in during that interval before purging them. This way, you can optimize the DNS caching usage without exceeding storage capacity, and efficiently manage the cache data with recurring, timely flushes.

Overall, Net::DNSServer::DBMCache is the perfect DNS cache solution for companies and businesses in need of fast, reliable, and efficient DNS performance. So, if you aim for seamless DNS cache handling, this module is worth integrating into your infrastructure.