I thought I would just like to share a recent experience with thie list and invite comments. I am ICT coordinator at Skegness Grammar School in England and I have been running an LTSP network for 7 years. For the last 4 years the whole school has been LTSP (about 190 clients on 3 application servers, each dual core dual Zeon with 8 Gb RAM and scsi disks). We have done all our teaching of computing using this setup. 90 students in three rooms could log on at the start of a lesson and be working in under 2 minutes - no network bandwith problems - using Gnome with nothing disabled. Now....... I decided to upgrade all the application servers to the most recent UBuntu and the LTSP5 that came with it to get new versions of apps and sound working out of the box so that we could do multiledia. We have just had two days of hell once the kids started logging on. log on times in the order of 4-8 minutes, some not even managing it. Firefox refusing to start for an entire class except one student. Load values of 12 and more with cpu's at less than 50% usage. USB storage access broken. I have never seen an LTSP install so slow. Virtually unworkable in a teaching environment. Bare in mind that the only thing that changed was the OS and LTSP version. Luckily I got the sysadmin to retain the old hard disks with our previous setup so after I had a disastrous first lesson today we have had to yank the new hard disks and revert to the old setup - works beautifully now. What is going on? LTSP has been rock solid and fast for the last 7 seven years. When we tested a couple of terminals before the kids hit it, the new system seemed fast and stable, but then these problems only manifest when under real load. Kind Regards Garry
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