[THIN] Re: biggest Citrix farm

It's at http://www.netiq.com/products/chr/howchariotworks.asp
Regards,

Tyler Kinchen


> -----Original Message-----
> From: Barry Flanagan [mailto:barry@xxxxxxxxxxxxxxxxxxxxx]
> Sent: Friday, February 27, 2004 1:47 PM
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: biggest Citrix farm
> 
> 
> Tyler,
> 
> I have not heard of Chariot. I am looking attheir website to see if I
> can find more info. 
> 
> Thanx,
> Barry Flanagan
> --- "Kinchen, Tyler" <KinchenT@xxxxxxxxxxxx> wrote:
> > Barry (or anyone), you ever see anyone using NetIQ's Chariot
> > (formerly
> > Ganymede Chariot) or have an opinion on it's ability to simulate a
> > load on a
> > Citrix farm.  I know it has application scripts for ICA but have
> > never heard
> > how good/bad it is?  Any thoughts on it?
> > Regards,
> > 
> > Tyler Kinchen
> > 
> > 
> > > -----Original Message-----
> > > From: Barry Flanagan [mailto:barry.flanagan@xxxxxxxxxx]
> > > Sent: Thursday, February 26, 2004 5:54 PM
> > > To: 'thin@xxxxxxxxxxxxx'
> > > Subject: [THIN] Re: biggest Citrix farm
> > > 
> > > 
> > > Ron,
> > > I agree with your caution on how many servers to run in a farm.
> > Every
> > > environment is different, and no test department can 
> > > completely simulate all
> > > the possible scenarios customers may build. For a farm that 
> > > large, before
> > > ever rolling it out I would try to simulate the environment 
> > > with a load
> > > simulation tool like Mercury Interactive's Load Runner with the
> > Citrix
> > > Virtual User. For an environment that is approaching 300 or 
> > > more servers ,
> > > MI (or one of their competitors) is a worthy investment. I 
> > > like MI because
> > > you can record a user session then kick off a large quantity 
> > > of sessions per
> > > client. MI says you can simulate 100 from a beefy client test
> > machine,
> > > though in my experience more than 40 is pushing it (not sure what
> > MI
> > > considers beefy). Not many corporations would rollout a 
> > > project with 300-500
> > > web servers without simulating the load first. 
> > > If you simulate the load before you roll out, you should find any
> > weak
> > > points before production. The key of course is simulating 
> > > what real users
> > > will do. MI cost a lot of cash, unfortunately. If the 
> > > customer already uses
> > > it for web simulation, adding the Citrix VU is a lot easier 
> > > to swallow. I
> > > agree that you cannot pitch a design based on test numbers 
> > > that may or may
> > > not apply to your environment. Load simulation should give 
> > > you a lot more
> > > confidence. All you have to do is convince the ones with the 
> > > money it is
> > > worth it. <g>
> > > 
> > > Those numbers you heard about test are a bit different from what
> > my
> > > experience has been. I saw the test environment when they had 
> > > 1000 servers
> > > in the farm. They regularly test 500 in a farm (at least once 
> > > for every new
> > > release). They keep about 250 servers in the scalability lab 
> > > (test Level 2).
> > > 
> > > 
> > > 
> > > FR3 was tested with up to 800 servers in a zone. Another 
> > > interesting number
> > > was IMA start time was reduced from 8 minutes in a 250 server 
> > > farm (for Fr2)
> > > to under a minute (for Fr3). That alone should greatly 
> > > improve scalability.
> > > These numbers were presented at iForum I believe. As I 
> > > mentioned before,
> > > your mileage may vary.
> > > 
> > > 
> > > Thanx,
> > > 
> > > Barry Flanagan
> > > 
> > >  
> > > * From: "Ron Oglesby" <roglesby@xxxxxxxxxxxx> 
> > > * To: <thin@xxxxxxxxxxxxx> 
> > > * Date: Thu, 26 Feb 2004 14:05:19 -0600 
> > > In one farm... You had better retalk to Citrix consulting. The
> > test
> > > engineers and Citrix CCS architects I deal with don't want to 
> > > sign off on
> > > anything larger that 400+ servers in the SAME farm. Different 
> > > frams in the
> > > same environment is different. 
> > > 
> > > Hell Test says they haven't even tested much bigger than 400
> > > 
> > > Ron Oglesby
> > > Senior Technical Architect
> > > Microsoft MVP - Windows Server
> > >  
> > > RapidApp, Chicago
> > > Mobile 815 325-7618
> > > Office 312 372-7188
> > > e-mail roglesby@xxxxxxxxxxxx
> > > 
> > > 
> > > 
> > > 
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