There is a native z/VM implementation of the NTP available off of the IBM VM download page (http://www.vm.ibm.com/download/packages). Look for the TIMESERV package there; it allows all of your Linux machines to sync up to the VM TOD clock.
Dave Jones Sine Nomine Associates Houston ----- Original Message ----- From: "James Tison" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, November 04, 2003 9:25 AM Subject: Re: NTP (Time Synchronization) in the Z environment > I ntp sync my z/VM Linux guests from an external source. I have no idea > what hardware the ntpd server is running, but I assume it's native, > dedicated hardware. I run 'ntpdate' via cron every 30 minutes on my z/VM > guests, and am only seeing between 1 and 4 ms corrections (randomly) at > every interval. For those reasons, I wouldn't run my ntpd on a z/VM guest. > Some of the lower quality Chinese mobos I've seen on peecees don't make for > good ntpd servers, either. You need a very stable internal clock with very > little drift. Ultimately, you want to ntp sync with a server that gets its > value either directly or indirectly from tick or tock (.usno.navy.mil) -- > that's fed off of the US Naval Observatory's atomic clock. > > --Jim-- > James S. Tison > Senior Software Engineer > TPF Laboratory / Architecture > IBM Corporation > "A bird in hand is safer than one overhead." >
