I've noted that response-times vary for our DNS systems -- and find myself shifting my Imail systems to an alternate DNS (manually) in order to keep the mail flowing. We have a set-up similar to Markus (one DNS with a lot of primary zones, two additonal DNS with secondaries to the primary system) As we've been experimenting with a unix-based MTA, we've set up a recursive caching DNS on the MTA and a iterant DNS on a second RH 7.3. Both are using BIND 8, I believe. In addtion to these, I occasionally bring our provider's load-balanced DNS into the mix. What I've not discovered is the how/why a particular DNS slows down. It is completely intermittent and without any reason I've been able to determine (yet). My assumption is that I need to insure that DNS queries from our internal network do not tie up those servers that I've pointed Imail at. Again, so far... it still seems intermittent, performance-wise.
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Smart Business > Lists > Sent: Thursday, August 22, 2002 7:36 AM > To: [EMAIL PROTECTED] > Subject: Re: [IMail Forum] Another DNS question > > > markus, > > Thursday, August 22, 2002 you wrote: > M> The question: what nameservers should I configure on the > M> ip-configuration of the w2k-servers? > > My opinion is that it depends a bit on the server's usage. > If there are relatively many dns queries by the server independent > of IMAIL then I'd be inclined to set a different dns server so as > to try to keep the IMAIL dns server less encumbered. > > On the other hand if there are relatively few server dns queries > then I'd probably leave them the same so it would be easier to > troubleshoot. > > I think I'm going to spend some more time monitoring our DNS > server's response times because I do think that has more bearing on > mail operation than we often credit. > > Terry Fritts To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
