> -----Original Message----- > From: bind-users-boun...@lists.isc.org [mailto:bind-users- > boun...@lists.isc.org] On Behalf Of Mark Andrews > Sent: Friday, 12 September 2014 8:58 AM > To: John Miller > Cc: Bind Users Mailing List > Subject: Re: Promoting slave to master DNS server with dynamic updates > > Journals are consolidated into the master file every 15 minutes. > The journal exists to recover from the master dying unexpectedly. > It is also used as the source of IXFR data. Additionaly notify > messages are scheduled to be sent out after 3 seconds so slaves > should only be a couple of seconds behind and they also write > journals. > > With UPDATE, NOTIFY and IXFR a set of DNS servers should only loose > up to a couple of seconds of transactions in the event of a master > dying in such a way that the disks are unreadable.
Also worth noting that there is a configuration item that can change the notify delay down from 3 seconds if it is so desired. If you have a low volume of updates, you may be able to get away with making it '0', but if you have any volume, you really want it to be a few seconds. Stuart _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
