[Pdns-dev] PowerDNS Recursor 4.5.0 Alpa1 Released

Otto Moerbeek otto.moerbeek at open-xchange.com
Fri Jan 15 10:13:15 UTC 2021


   We are proud to announce the first alpha release of what should
   become PowerDNS Recursor 4.5.0. This release contains various bug
   fixes, improvements and new features.

   The upcoming 4.5.0 release features a re-worked negative cache that
   is shared between threads, allowing more efficient use of the cache
   and reduced memory consumption.

   Support for Extended DNS Errors (RFC 8914[1]) has been added. These
   can be enabled by setting the extended-resolution-errors[2] setting
   to 'yes', this will send DNSSEC and resolution related errors to
   clients.  Extended Errors are also hooked up to the Lua scripting
   engine[3], allowing fine-grained setting of both the error code and
   extra information in the response.

   A "refresh almost expired records" (also called "refetch")
   mechanism[4] has been introduced to keep the record cache warm. In
   short, if a query comes in and the cached record's TTL is almost
   expired (within N percent of its original value) the cached record
   is served to the client and the record queried for in the
   background, ensuring that new queries for that record are fresh and
   served from the cache.

   Other new features and improvements are:

     * The complete protobuffer and dnstap logging code has been rewritten
       to have much smaller performance impact.
     * We have introduced non-offensive synonyms for words used in
       settings. See the upgrade[5] guide.
     * The default minimum TTL[6] override has been changed from 0 to 1.

   Please refer to the changelog[7] for additional details.

   Please send us all feedback and issues you might have via the
   mailing list[8], or in case of a bug, via GitHub[9].

   The tarball[10] (signature[11]) is available from our download
   server[12] and packages for CentOS 7 and 8, Debian Buster and
   Ubuntu Bionic and Focal are available from our repository[13].

   With the future 4.5.0 final release, the 4.2.x releases will be EOL
   and the 4.3.x releases will go into critical security fixes only
   mode.  Consult the EOL policy[14] for more details.

   We would also like to take this opportunity to announce that we
   will stop supporting systems using 32-bit time. This includes
   32-bit Linux platforms like arm and i386 before kernel version 5.1.

   We are grateful to the PowerDNS community for the reporting of
   bugs, issues, feature requests, and especially to the submitters of
   fixes and features.

 -Otto and the PowerDNS Team


   1. https://tools.ietf.org/html/rfc8914.html
   2. https://docs.powerdns.com/recursor/settings.html#extended-resolution-errors
   3. https://docs.powerdns.com/recursor/lua-scripting/dq.html#DNSQuestion.extendedErrorCode
   4. https://docs.powerdns.com/recursor/settings.html#refresh-on-ttl-perc
   5. https://docs.powerdns.com/recursor/upgrade.html#x-to-4-5-0-or-master
   6. https://docs.powerdns.com/recursor/settings.html#minimum-ttl-override
   7. https://doc.powerdns.com/recursor/changelog/4.5.html#change-4.5.0-alpha1
   8. https://mailman.powerdns.com/mailman/listinfo/pdns-users
   9. https://github.com/PowerDNS/pdns/issues/new/choose
  10. https://downloads.powerdns.com/releases/pdns-recursor-4.5.0-alpha1.tar.bz2
  11. https://downloads.powerdns.com/releases/pdns-recursor-4.5.0-alpha1.tar.bz2.sig
  12. https://downloads.powerdns.com/releases/
  13. https://repo.powerdns.com/
  14. https://docs.powerdns.com/recursor/appendices/EOL.html


kind regards,
Otto Moerbeek
PowerDNS Developer

Email: otto.moerbeek at open-xchange.com

Open-Xchange AG, Hohenzollernring 72, 50672 Cologne, District Court Cologne HRB 95366
Managing Board: Andreas Gauger, Carsten Dirks, Dirk Valbert, Frank Hoberg, Stephan Martin
Chairman of the Board: Richard Seibt

PowerDNS.COM BV, Koninginnegracht 14L, 2514 AA Den Haag, The Netherlands
Managing Director: Robert Brandt, Carsten Dirks
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