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Subject: RE: [ActiveDir] DNS Records loading slowly in win 2008 R2

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Techman06

Posts:4

02/02/2012 4:06 PM
I would have to do some additional checking but Brian may be on to something. Server 2008 by default uses port 9389 for AD DNS queries. Server 2008R2 introduced DNS Socket Pooling which effectively uses random ports to query DNS requests. Unless your firewall policies enable the range, it could potentially cause significant delays in pulling DNS info on R2. Check out: http://technet.microsoft.com/en-us/library/ee683907(v=ws.10).aspx for further descriptions to see if it matches up to your situation. Gary Gray -----Original Message----- From: activedir-owner@mail.activedir.org [mailto:activedir-owner@mail.activedir.org] On Behalf Of Britt, Brian Sent: Wednesday, February 01, 2012 3:36 PM To: activedir@mail.activedir.org Subject: Re: [ActiveDir] DNS Records loding slowly in win 2008 R2 70 k does not sound like that much. If we were using ADDNS, I am sure it would be more than that. I am told by some MS folks that there are much larger orgs. Using ADDNS without the trouble. Is the issue with the DNS console or with DNS itself. I do remember having a similar issue with DNS console and I believe there was a hotfix that addressed the issue. Are you using the dns mmc or server manager to view the zones. That might help isolate the issue. Server manager uses ports 5985 and 5986 and 9389 for AD web services. May be worth a try to use them both and see if there is a difference. Brian Britt Sent from my Android Tablet. Rand Salazar <rmscheck08@gmail.com> wrote: I dunno.. is 70K really ridiculous? anyone have an environment with that sort of number? I've 20-30K meeself... I dont recall them having issues then, but now you got me going... On Wed, Feb 1, 2012 at 2:42 AM, Jeremy Saunders <jeremy@jhouseconsulting.com> wrote: > Hi Jit, > > > > After sending this to the list 3 times I think I better respond with > some info. > > > > 70,000 records is a ridiculous amount. Are they all real, or are a > certain percentage stale? Have you got scavenging enabled? > > > > Anyway, these two hotfixes are a requirement for any large AD/DNS > based on Windows 2008 R2: > > KB983534: Performance of the DNS Server service keeps decreasing under > a heavy load situation in Windows Server 2008 R2 > > KB2548145: The size of the Active Directory increases rapidly on a > Windows Server 2008 R2-based domain controller that hosts the DNS > Server role > > > > Cheers, > > Jeremy. > > > > From: activedir-owner@mail.activedir.org > [mailto:activedir-owner@mail.activedir.org] On Behalf Of > jithendra.bm@gmail.com > Sent: Wednesday, 1 February 2012 3:46 PM > To: activedir@mail.activedir.org > Subject: [ActiveDir] DNS Records loding slowly in win 2008 R2 > > > > Hello All, > > > > There is around 70,000+ DNS records (A, CNAME, MX, NS, SRV) in our forest. > > > > In windows 2008 DNS management console, when I open the domain Zone, > it will load all 70,000+ records with in a minute where as in windows > 2008 R2 DCs it takes more than 5 minutes to load. > > > > Does anyone experienced this behavior? > > Regards, > Jit List info: http://www.activedir.org/List.aspx List info: http://www.activedir.org/List.aspx List info: http://www.activedir.org/List.aspx

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