[THIN] Re: Web Interface Query - NetBT Errors

Thanks for the information Eric. Do you know of an alternative method
I can use to resolve the issue should it arise?

Toby

On 7/29/05, Foote, Eric <EFoote@xxxxxxx> wrote:
> Just a side note here:
> 
> Be sure that you understand the implications of making this change on a 
> permanent basis.
> The TTL's purpose in life is to reduce the overhead of DNS queries from the 
> client's transaction perspective, reduce the load on the DNS servers and 
> provide the ability for the client to sustain functionality during a DNS 
> outage.
> 
> The refresh time for the domain is also significant if you have a 
> multi-tiered DNS structure (internal or external).  If you change the TTL on 
> an "A" record at the domain primary but the downstream DNS servers are only 
> updating once/day because domain refresh is set to 86400, the downstream 
> clients will not see the change until the downstream DNS server refreshes 
> from the primary.
> 
> DNS is one of those services that you really need to spend some time on 
> understanding, the implications of a misconfigured domain can be disasterous. 
>  Microsoft has done a great job of making DNS "invisible" and "simple" and 
> many admins don't take the time to really understand how it works.
> 
> Eric
> 
> Eric M. Foote
> Detroit Medical Center
> Intel Server Group Leader
> Security Group Leader
> OP 5-1625
> 3663 Woodward Ave.
> Detroit, MI 48201-2403
> (313) 578-2310
> <mailto:EFoote@xxxxxxx>
> Fax (313) 578-2265
> 
> 
> -----Original Message-----
> From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On
> Behalf Of Toby
> Sent: Friday, July 29, 2005 5:09 AM
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: Web Interface Query - NetBT Errors
> 
> 
> So when they say you learn something new everyday, they were right.
> 
> Thankyou very much.
> 
> Toby
> 
> On 7/28/05, Jeff Pitsch <jepitsch@xxxxxxxxx> wrote:
> > Open DNS admin console, click on view, then Advanced.  Then go to the
> > actual entry of the record and open it.  You'll now see the Time to
> > Live parameters.  You may want to set this one lower than the default.
> >  This is the setting of how long the record will reside in teh client
> > side cache.  For instance, if your web server goes down and a user had
> > already accessed the web server, it could potentially take up to an
> > hour before the record leaves the cache and the user could pull the
> > correct IP.
> >
> > Jeff Pitsch
> >
> > On 7/28/05, Toby <toby.percival@xxxxxxxxx> wrote:
> > > Forgive me, DNS is not my thing. How do I change the TTL (is that time
> > > to live?) in DNS.
> > >
> > > On 7/28/05, Jeff Pitsch <jepitsch@xxxxxxxxx> wrote:
> > > > No requirement, but it may be desired.
> > > >
> > > > Yes, you could easily change the DNS.  I would change the TTL of the
> > > > entry though just in case.
> > > >
> > > > Jeff Pitsch
> > > >
> > > > On 7/28/05, Toby <toby.percival@xxxxxxxxx> wrote:
> > > > > Thanks for the reply Jeff.
> > > > >
> > > > > So no requirement for load balancing then. Ok, that is great.
> > > > >
> > > > > I have created an alias in DNS, 'citrix', which points to the WI 
> > > > > server.
> > > > > In a disaster recovery exercise, all I have to do is point this alias
> > > > > to my backup WI server.
> > > > >
> > > > > Is that configuration along the right lines?
> > > > >
> > > > > Thanks
> > > > >
> > > > >
> > > > >
> > > > > On 7/28/05, Jeff Pitsch <jepitsch@xxxxxxxxx> wrote:
> > > > > > Keep in mind that WI only does app enumeration and handoff.  After a
> > > > > > session is started, WI has nothing to do wiht it.  So the actual 
> > > > > > load
> > > > > > of 400 users is very small.  Also,if your that concerned about it, I
> > > > > > would recommend moving the WI serves off the Metaframe servers.  One
> > > > > > WI server can easily handle 400 users.
> > > > > >
> > > > > > Jeff Pitsch
> > > > > >
> > > > > > On 7/28/05, Toby <toby.percival@xxxxxxxxx> wrote:
> > > > > > > Hi List,
> > > > > > >
> > > > > > > I have a Web Interface query.
> > > > > > >
> > > > > > > I have 15 Citrix servers (PS4.0 on W2K3), and three of these are 
> > > > > > > WI
> > > > > > > servers. Instead of having one server service 400 connections, 
> > > > > > > how do
> > > > > > > you go about load balancing the 3 WI servers.
> > > > > > >
> > > > > > > What around DNS round robin?
> > > > > > > Or maybe a third party app out there?
> > > > > > >
> > > > > > > Any ideas would be very gratefully received.
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