Christofer C. Bell wrote:
Aleksander, can you please name some mainstream commerical Unix operating systems that are designed to be "rock stable in real world applications" using the criteria you've outlined? (Those criteria seeming to be kernel level process starvation protection that's "always on" and "intelligent").
I have to admit, none in Unix category that is absolutely perfect (out of those I worked with). But there are some not far from there. For example, OpenBSD can't be brought down by single process being swapped a lot. The mmap/memset attack simply doesn't work on it. Things do get a bit on a slowish side, however services are still responsive and I'm perfectly able to login and kill offending process (just tested it on ancient sparc station 5 with 64 meg of RAM and old and *slow* disks that can hardly do 2 megs/sec). On Linux, no such luck, brings fast P4 machine (with relatively fast disks capable of 20 megs/sec) to a halt.
Solaris handles this kind of things more gracefully, as well as old Digital's OSF/1 (alias Digital Unix, alias Compaq Tru64, alias whatever HP calls it nowdays).
So, there you have a few. Linux beats them hands down in some benchmarks. But they beat Linux hands down in resource allocations under heavy loads.
-- Aleksandar Milivojevic <amilivojevic@xxxxxx> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7
