[Pdns-announce] PowerDNS Authoritative Server 4.5.0
Peter van Dijk
peter.van.dijk at powerdns.com
Tue Jul 13 11:23:37 UTC 2021
PowerDNS Authoritative Server 4.5.0 was released today.
Version 4.5.0 mostly brings small improvements and fixes, but there are
two notable new features:
* The ‘zone cache’, which allows PowerDNS to keep a list of zones in
memory, updated periodically. With this cache, PowerDNS can avoid
hitting the database with queries for unknown domains. In some setups,
and some attack scenarios, this can make a serious performance
difference. Users of backends with dynamically generated zones may want
to disable this or at least read the upgrade notes extremely carefully.
Many thanks to Chris Hofstaedtler for implementing this. This work by
Chris was supported by RcodeZero DNS.
* Priority ordering in the AXFR queue in PowerDNS running as a
secondary. Some users with a lot of domains (>100k) sometimes found
real changes waiting behind signature refreshes on Thursdays. With the
new ordering, those real changes can ‘skip the line’ and get deployed
on your secondaries faster. Many thanks to Robin Geuze of TransIP for
Since 4.5.0-beta1, the zone cache is enabled by default.
A full list of changes can be found in the changelog.
Please make sure to read the Upgrade Notes before upgrading.
With version 4.5.0, support for platforms with a time_t type smaller
than 64 bits is dropped. This means that we do not build packages for
Raspberry Pi OS.
The tarball (signature) is available at
downloads.powerdns.com. Packages for various distributions are
available from repo.powerdns.com.
Please send us all feedback and issues you might have via the
mailing list, or in case of a bug, via GitHub.
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