Ah! I misunderstood then. Thanks for the clarification. Peter
-----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] Sent: Friday, July 29, 2005 1:14 PM To: [email protected] Subject: Re: Server Time Protocol (Was: Re: SMPE 3.4) Ulrich Boche wrote: > Edward E. Jaffe wrote: > > z/OS systems in a sysplex must have synchronized TOD clocks. My > >> understanding was that the precision of NTP was insufficient for this >> purpose I'm certainly no expert in this area, so I'll defer to IBM to >> explain the intricacies of STP when the time comes. > > It wasn't suggested to replace STP with NTP or SNTP. All that was > suggested was to use an NTP client to set STP's time base. This would > be at least as accurate as dialing out to a time service or using a > GPS receiver. Quite right! STP replaces the Sysplex Timer hardware. Its job is to synchronize the TOD clocks across loosely-coupled processors. It is so precise, it can (in the initial release) perform this function at distances of up to 100 km. This TOD clock synchronization function is _completely separate_ from that of obtaining a UTC time reference from NIST or other "official" source. _ This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
