> I don't think I'd want to depend on a zLinux system under VM > as a stable time source. I seem to recall that Linux only > sets the software clock to match VM at boot time, and > occasionally misses clock > interrupts (especially at high load), causing the software > clock to drift over time.
We use multiple time sources as well to supplement the zLinux NTP. Dave Jones' VM SNTP implementation runs on the base VM system, and can correct zLinux as needed, and we also give the xntp daemon on the Linux system a peek at one of our routers that has a fairly stable clock. xntp then integrates the two (plus it's own clock), and serves that out to the rest of the world. -- db
