IBM announced today support for the server Time Protocol (STP) in the
zSeries hardware.
Availability of Server Time Protocol can:

    * Help improve time synchronization for z9 EC, z9 BC, z990, and z890
    * Support a multisite sysplex distance up to 100 km
    * Synchronize servers and Coupling Facilities across three sites
(data centers)
    * Coexist with an External Time Reference (ETR) network
    * Allow concurrent migration from an ETR network when properly
configured

Unfortunately, z/VM, and guest running under z/VM (e.g., Linux, z/OS),
Linux in an LPAR and z/VSE can not take advantage of this new feature.

Details here:
http://www-306.ibm.com/common/ssi/fcgi-bin/ssialias?subtype=ca&infotype=an&appname=iSource&supplier=872&letternum=ENUSAG06-0715

DJ

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