Onsdag 12. august 2009, skrev RalfGesellensetter: > I ascribe this to > - new TFT screens with higher resolution (more X data to serve) > - increasing use of Flash videos > - increasing use of animations all over the web > - possibly also more use of Java related stuff (is this rendered > by native X11 sequences or rather as direct graphic drawing?)
Such requirements calls for Diskless Workstation[1] (aka Low Fat clients). This is explained in some depth here: 1. http://wiki.debian.org/DebianEdu/HowTo/LtspDisklessWorkstation Technologies as X, FreeNX og Citrix (aka RDS)[2] can't really handle the bandwidth requirement in an efficient way when requiring Flash videos, more heavy graphics and animations etc. This because of network saturation you get inherent from the network traffic generated at the LTSP server(s), which has to be transported to each client PC. 2. http://en.wikipedia.org/wiki/Terminal_Services Going for LTSP X-clients (aka thin clients), you may end up with 5-10 servers when supporting 100-150 clients, and a heavy duty 1 Gbit/s between each server and the switch serving the LTSP clients. To cost upgrading the network, acquiring new switches and mores servers, can easily be more expensive than a light upgrade of the client PC's, keeping the 100 Mbit/s network. Then it's probably better to use one single server, supporting 100-150 Diskless Workstations (which actually runs with the LTSP solution). Then the graphics and video are mostly transported between local parts on each PC. Shuffling graphics between local memory and the graphic ship on a PC is easy compared to sending such individual data chunks from a server to many clients. If you go fore Diskless LTSP you should use PC's with minimum 800-1000Mhz, 256-512MB ram and local swap disk. And you can keep several thin LTSP clients in your computer network still, doing an transition from thin clients to Diskless LTSP's when future investments allow it. In Norway whole municipalities are running Diskless workstations at all the schools. They say it's rock solid and are much better suited for Flash, video and other graphics compared with thin LTSP client's. The Diskless workstations is an evolution to the requirement schools expect of their PC's in 2009 which is quite more heavy compared to 2001, when Skolelinux started. Best regards Knut Yrvin -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
