Barry Rowlingson wrote: > Gavin Simpson wrote: > >>Dear list, >> >>My employer uses a Windows 2000 Terminal Server-based system for its >>college-wide managed computer service - computers connect directly to >>the WTS servers for their sessions, using a Citrix ICA client. When I >>asked them to install R (Windows) on an older version of this service >>the IT guys installed it but pulled it for performance issues. I am >>trying to get them to try again but receiving little encouragement from >>them. > > > 'performance issues'? Well, if you have 100 students running MCMC > simulations on one Windows 2000 TS box then you may well have > 'performance issues'! > > Perhaps the TS service isn't intended for people to do real computer > work on, but is just for Office apps. Then you come along and want your > students to do serious number crunching. At that point the MS Word > writers experience what we used to call 'lag'. > > >>Does anyone on the list have experience of a similar set-up? If you do, >>I could use that as part of my argument to invest some time in sorting >>these issues out. I really want to get the Windows version of R >>installed for teaching because at the moment I subject my students to >>the rather hostile world of an archaic UNIX session to run R - for them >>at least. > > > We have a couple of labs that are similar - we use Wyse Thin Client > Xterminals which boot Thinstation Linux from a server and then connect > to Windows 2003 TS machines using RDP or Ubuntu Linux boxes using XDMCP. > We dont use Citrix ICA. > > 'Performance issues' will depend very much on what you are doing. As a > quick benchmark, last term we had 24 users in a lab all running Windows > and running Matlab, Firefox, that kind of stuff. One dual 2.6GHz Xeon > Dell with 4G Ram never went above 60% CPU usage. And we had another > three similar Dells sitting idle waiting for installation. Sessions with > R run regularly in these labs and we've never had 'performance issues'.
Back in September there was some issue with your setup, but I forget the details. Do you remember? Is it something we ended up working around, or did the 2.2 release fix it? Duncan > > So possibly your IT support are stalling. Do they regularly say "Have > you tried switching it off and on again?" in response to a support query > [1]? > > Barry > > [1] Catchphrase of the tech support guys in comedy series 'The IT Crowd' > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html