Technical References

scvg-enabled bool default = false
Enables dynamic resource-record scavenging for the zone. This
attribute removes stale records when clients are
configured to perform DNS updates but do not delete their
entries when they're no longer valid. If the DHCP server is used
to perform updates, it will also delete records when client
leases expire. Scavenging should not be enabled on these zones.
scvg-ignore-restart-interval rangetime(2h-24h)
Ensures that the server does not reset the scavenging time
whenever a server restarts. With this attribute set,
Network Registrar ignores the time between when a server went
down and the time it restarts. This interval is normally short.
The value can range from two hours to one day.
With any time longer than the set time, Network Registrar
recalculates the scavenging period to allow for record updates
that cannot take place while the server is stopped. You can also
set this attribute on a zone, and the value set on the zone
overrides the server setting. Default is 2h.
scvg-interval rangetime(60m-1y)
Sets the period of time that must elapse before a DNS server
can remove an out-of-date address (A) record. An A record becomes
out-of-date once it ages past its initial creation date plus its
scvg-refresh-interval and scvg-no-refresh-interval. Default is 1w.
scvg-max-records rangeint(1-10000)
Sets the maximum number of records to remove from a zone during
its scavenging interval.
scvg-max-records-searched int
Sets the maximum number of records to search for out-of-date
A records. These records are candidates for scavenging.
scvg-no-refresh-interval rangetime(60m-1y)
With scavenging enabled, sets the interval during which DNS
updates cannot increment an A record timestamp. After both
the no-refresh and refresh intervals expire, the record becomes a
candidate for scavenging. The value can range from one hour to
365 days. You can also set this attribute on a zone, and the
value set on the zone overrides the server setting. Default is 1w.
scvg-pause-interval rangetime(1s-24h)
Sets the number of seconds the server waits after scavenging
one set of records before going to the next set.
scvg-refresh-interval rangetime(60m-1y)
With scavenging enabled, sets the interval during which DNS
updates can increment the A record timestamp. After both the
no-refresh and refresh intervals expire, the record is a
candidate for scavenging. The value can range from one hour
to 365 days. You can also set this attribute on a zone, and
the value set on the zone overrides the server setting.
Default is 1w.