PowerDNS daemon 2.9.21

PowerDNS daemon Nameserver is a advanced, modern and high performance authoritative-only nameserver.
It is written from scratch and conforms to all relevant DNS standards documents. Furthermore, PowerDNS interfaces with almost any database.
The PowerDNS Nameserver utilizes, a flexible backend architecture can access DNS information from any data source. This includes file formats, Bind zone files, relational databases or LDAP directories.
If you have specific needs for your DNS infrastructure then you can use the Backend Developers Kit to write the glue between PowerDNS and your data or logic.
There is one master database that is replicated to two slave databases. The slave databases are read-only and are updated immediately when the master database changes.
For sites that do not yet have an existing database infrastructure we recommend the MySQL database. MySQL is very easy to setup and handles replication well.
If your nameservers are located on different physical networks then you immediately take advantage of the distributed nature of DNS. Questions will be load balanced on your array of servers. If a server is down then one of the other servers is queried.
PowerDNS is by default configured to serve all information directly from a database, which results in unmatched maintainability of your DNS information.
PowerDNS has developed a complete suite of technologies surrounding Internet Naming and email. Internet Naming is at the core of all online activities and is involved in each and every transaction on the net. Email remains the killer application of the Internet.
Enhancements:
- This release fixes many issues, unifies the PowerDNS Recursor and Authoritative DNS infrastructure (reducing code size by 2,000 lines), significantly improves the "BIND" compatibility mode (making real life zone loading up to 30 times faster than the original BIND), addresses many corner cases, reworks the TCP backend for improved stability, and makes 64 bit packages available.