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At 5:09 PM +0000 12/19/01, QuickDNS_Talk wrote:
Re: masters and slaves Q
From: Men & Mice Support
Date: Wednesday, December 19, 2001
Time: 1:53:42 pm
>[Using QDNS 3.5 for Linux and MacOS X]
>
>Maybe I'm just having a terminology problem: in QDNS Mgr (Windows) when
>you create a zone you can only select it to have one master, but any
>number of slaves. This makes sense of course. (We currently have four
>QDNS servers kicking about... !]
>
>Yet in zone options, if you pick one of the slaves from the pop-up, you
>can add additional 'master' servers to the list below. What is this list
>for, if there' s only ever one master for a zone?
>
>Does it infer something about that particular slave using other (slave)
>servers for refreshes if the (real) master is offline?!?
The option is there for historical reasons, as near as I can tell. I
for one have never heard of any actual production use of this
feature, with either QuickDNS or BIND, except for the (problematic)
scenario you suggest.
Do not have your slave servers use each other as "backup master"
servers. At best, this will have no effect; otherwise, it will cause
problems.
Here's what the option is for: Suppose you want to have a three-level
system, with a "primary master" (the server where you make your
edits), a small number of second-tier "masters" which update from the
primary master, and several slaves that update from the second-tier
masters. In the slave server configuration, each slave could have
each second-tier master listed.
I frankly cannot imagine any problem that would be solved by such a
setup which couldn't be better solved some other way. But the
possibility is there.
____________________________________________________________________
Chris Buxton Men & Mice
support@menandmice.com Making DNS Easy
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