[THIN] Re: Web Interface - Load Balancing between farms

Well I talked with the architect requesting it and he agrees, but it has now 
become a political decision and we all know how those go. 

On 8/26/05, Jeff Pitsch <jepitsch@xxxxxxxxx> wrote:
> 
> Upgrade to PS3 and the 96 hour windows goes bye bye. If your having that 
> many problems with the datastore and data collectors, I would hunt down what 
> those problems. It sounds like your trying to fix symptoms instead of the 
> underlying problems. 
>  Jeff Pitsch
> 
>  On 8/26/05, Joe Shonk <joe.shonk@xxxxxxxxx> wrote: 
> > 
> >  You could look into Database replication, log shipping etc… It's not 
> > difficult to failover the Citrix servers to another SQL server, and even 
> > then you have 96 hour in which the DataStore can be offline. 
> > 
> >  Joe
> > 
> >   ------------------------------
> >  
> > *From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] *On 
> > Behalf Of *Schill, Mark
> > *Sent:* Friday, August 26, 2005 8:24 AM 
> > *To:* thin@xxxxxxxxxxxxx 
> > *Subject:* [THIN] Re: Web Interface - Load Balancing between farms
> > 
> >   In our case I don't think that the hardware load balancing equipment 
> > is the issue. The problem is that hardware load balancing will load balance 
> > the web interface servers and not the MetaFrame farms. So 1000 people could 
> > launch the application via another means like a custom ICA connection or 
> > Program neighborhood and connect to Farm B. The load balancers would still 
> > treat each web interface server as equal load. The same would go if 1000 
> > users logged into the web site and only the ones directed to Farm A 
> > actually 
> > launched the application. 
> > 
> >  FYI. We have apparently have had issues with Data Collectors and Data 
> > Stores crapping out. We can do multiple Data Collectors and multiple 
> > database servers, but it still comes down to a single database and we have 
> > a 
> > farm do down because the database got corrupted. 
> > 
> >     *Mark E. Schill** 
> > Senior Analyst, Citrix Technical Services*
> >  
> > (404) 735-9520
> > Mark.Schill@xxxxxxxxxxxx 
> >  
> >    ------------------------------
> >  
> > *From:* Joe Shonk [mailto: joe.shonk@xxxxxxxxx] 
> > *Sent:* Friday, August 26, 2005 11:09 AM 
> > *To:* thin@xxxxxxxxxxxxx
> > * Subject:* [THIN] Re: Web Interface - Load Balancing between farms
> > 
> >  The cost is relative. Most Enterprises are more than will to invest in 
> > a pair of hardware load-balancers in order to provide higher availability 
> > of 
> > services. 
> > 
> >  Joe
> > 
> >   ------------------------------
> >  
> > *From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] *On 
> > Behalf Of *Evan Mann
> > *Sent:* Friday, August 26, 2005 7:51 AM
> > *To:* thin@xxxxxxxxxxxxx
> > *Subject:* [THIN] Re: Web Interface - Load Balancing between farms
> > 
> >  Talk about expensive. Load balancing hardware is not cheap.
> > 
> >  ------------------------------
> >  
> > *From:* thin-bounce@xxxxxxxxxxxxx [mailto: thin-bounce@xxxxxxxxxxxxx] *On 
> > Behalf Of *Joe Shonk
> > *Sent:* Friday, August 26, 2005 10:49 AM
> > * To:* thin@xxxxxxxxxxxxx
> > *Subject:* [THIN] Re: Web Interface - Load Balancing between farms 
> > 
> > Why make it difficult… Just setup two WI servers (One for each farm) and 
> > use a Cisco CSS to load-balance the two WI… Half will use the Published 
> > apps 
> > from one WI server, and half will use the other. If one farm goes down, the 
> > other farm is available (I am assuming this is for Redundancy/DR otherwise 
> > it doesn't make any sense to LB the same application across two farms.) You 
> > should also look into using multiple zones instead of multiple farms. 
> > 
> >  Joe
> > 
> >   ------------------------------
> >  
> > *From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] *On 
> > Behalf Of *Mark Schill
> > *Sent:* Thursday, August 25, 2005 6:28 PM
> > *To:* thin@xxxxxxxxxxxxx
> > *Subject:* [THIN] Web Interface - Load Balancing between farms
> > 
> >  Greetings,
> > 
> > I have a requirement to develop a solution that would load balance an 
> > application through Web Interface to two different farms. So for example a 
> > user would click on Notepad and the Web Interface would calculate the load 
> > on each of the farms for the Notepad application and direct the user to 
> > that 
> > farm to launch the application. Don't need anything fancy for the load 
> > balancing mechanism. Application session count would probably be ok. I just 
> > read through the WI 4.0 SDK and am pretty sure I can code something, but 
> > I wanted to check and make sure that someone else hasn't already tackled 
> > this problem before I got down and dirty in coding something myself. 
> > 
> > -- 
> > Mark E. Schill 
> > 
> 
> 


-- 
Mark E. Schill

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