Eric, Once at boot, and unless you know for sure in your particular case, I would not assume that z/VM is getting its time from a "reliable source." Usually, it's an underpaid operator with a wristwatch.
Point ntpd on one of your Linux/390 guests to a stratum 2 (or 3) server, and have your others synch off that. Mark Post -----Original Message----- From: Eric Sammons [mailto:[EMAIL PROTECTED] Sent: Monday, November 03, 2003 9:27 AM To: [EMAIL PROTECTED] Subject: NTP (Time Synchronization) in the Z environment I have started looking at standards, processes, and procedures for our to be built z/Linux environment. I am currently interested in how folks are performing time synchronization updates? Do the guests get their time from VM / thus the system hardware, or is their clock some how managed at a software level. I suppose the time is obtained from the LPAR of which z/VM resides. If this is the case I would assume that z/VM is performing time sync operations with a reliable source. And finally, if the time is managed in this fashion are the linux guests continuously updated with the correct time or is this a once at boot thing? Thanks! Eric Sammons (804)697-3925 FRIT - Infrastructure Engineering
