[THIN] Re: biggest Citrix farm
- From: Barry Flanagan <barry@xxxxxxxxxxxxxxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Fri, 27 Feb 2004 10:47:28 -0800 (PST)
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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