From: David C. <dav...@fu...> - 2002-12-07 15:38:43
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Bognár Attila wrote: > - how stable is UML for production systems? I'm running UMLs with uptimes of ~123 days with 2.4.18-48um. I've personally had most success with 2.4.19-13um from the current 2.4.19 patches. There are known issues with the current UML patches, but I'm avoiding anything following the skas merge for production usage (not that there is anything wrong with skas - I've not had a problem with it. My host does not have the host patch, however). usermodelinux.org runs on a 2.4.19-13um UML. However, you're going to need a very stable host. This is documented on my site below. I'm currently running 2.4.19-pre10-fairsched, with which I've managed >40days uptime before it needed to be rebooted for hardware maintaince. > - how many UMLs can be run in a PC server with about P4 2GHz, 500MB RAM, > where the host machine has only one job: running UMLs, and the UMLs will > not have high loads (can it handle about 20?) Not very many. I've got 1.5Gb of RAM in my box, and all the UMLs (using 128Mb each) use ~2.2Gb of /tmp space, so 700Mb is being swapped in and out on demand. I've not noticed this causing the system to run slowly, but many of the UMLs are not particularly loaded. > - are there any performance analysis? (for example comparing with > freebsd jail) I posted host/tt/skas2/skas3 benchmarks to this list a week or two ago. > if the answers can be found somewhere, please let me know the urls or > some very specific keywords :-) I run a UML server. http://uml.openconsultancy.com/. Bill Stearns does too. http://www.stearns.org/slartibartfast/ David -- David Coulson dav...@fu... www.futurenet.co.uk www.linuxformat.co.uk / www.pcplus.co.uk |