Op vr, 16-06-2006 te 10:38 +0200, schreef Jonathan Carter: > On Fri, 2006-06-16 at 07:11 +0200, Knut Yrvin wrote: > > So the startup time is 5-6 sec on a system with enough RAM, and the > > main applications already used earlier on the day (stored in the temp > > area in RAM). When the system uses swapping on disk, the performance > > drops drastic. > > Your disk performance also drops down heavily, especially when users > start Gnome or OpenOffice.org, and the disk needs access to lots of > little files, while at the same time, it's reading/writing to swap > that's probably at the other end of the disk. By then you're getting no > where close to 80MB/s, and the system gets very, very sluggishly. > Spanning swap over two disks also helps. I don't know exactly how clever > the kernel is with spanning, and whether it will write to the disk that > is least busy, but I've definitely seen performance improvements when > spanning a swap file over disks. > > -Jonathan > > A little something I didn't read anything about... When not using compression on XDMCP and the users do a lot with moving images (videostreams e.g.) the bandwith a single thin client can take up is ~40 Mbit /sec. It's not hard to imagine your whole network will come down if a few users do such things simultaneously and your terminal server is connected to the network using a 100Mbit/sec NIC. That's why it's a whise thing to connect your terminalserver(s) etc. using 1Gbit/sec NIC's and use a proper GBit switch for your networks backbone.
-- Best regards/ vriendelijke groeten, Peter Bosman OSSO - Open Source Software Oplossingen Internet www.osso.nl Bezoekadres Nadorstplein 3, 9747AB Groningen Postadres Kremersheerd 86, 9737PC Groningen Telefoon 050 5494052 Mobiel 06 45616884 E-mail [EMAIL PROTECTED] -- edubuntu-users mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
