I have what I hope is a simple question. We're running the Authoritative server v3.2 as our masters with a Postgres backend. Our SOA TTL on our domains is set to 2 minutes because we do a lot of changes and need those to propagate quickly to our customers.
My question is about the way the masters retrieve the zone data from the database. It seems that every 2 minutes, the masters pull a complete zone file data set from the database even if there have been no changes to the data. I see the query for the SOA record every two minutes, but it appears that it then just goes ahead and pull the full zones. Since our masters are in multiple geographically dispersed data centers and our zone files are over 100MB in size. This presents a pretty significant hit on our bandwidth of over 200GB / bandwidth / day. Is there some setting I'm missing that tells pDNS to only pull zones from the DB if the SOA serial has changed? Here's a brief outline of our setup: 3 Locations: Each with 1 Master + 3 slaves. Masters are running pDNS 3.2 and slaves are running authoritative 3.3 w/ recursor 3.7.2 Postgres DB lives only in one location. Thanks in advance. Scott
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