Thanks for the overview. (I should write this out on the palm of my hand; too much hand washing these days, though.) As you or someone else pointed out, for z/OS Global, an 'XRC license' is required only at the source/prod site because, at the DR site, data is written to the mirror volumes via standard I/O.
However, in a real life fail-over scenario, you may well want to *mirror back* to the original site. Or begin mirroring to some other site. At that point the DR site will need an XRC license. . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-543-6132 Office ⇐=== NEW [email protected] -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of R.S. Sent: Tuesday, July 14, 2020 3:17 AM To: [email protected] Subject: (External):Re: Two Processors and One IODF CAUTION EXTERNAL EMAIL I hate new names of PPRC and XRC (and PPRC-XD), but... But one should know there are new features. New features with new names, but no old name exist for them. There are still PPRC, XRC, PPRC-XD, but there is also some kind of "XRC without z/OS", performed by dasd arrays without host involvement. Names? PPRC - Metro Mirror XRC - z/OS Global Mirror or Global Mirror for z/Series. Data is being moved by z/OS task (Data Mover). Interesting: only source array need a licensed feature of XRC. Target array need not, and it can be other type/vendor. PPRC-XD - Global Copy, neither synchronous nor asynchronous. It's inconsistent. (none) - Global Mirror (consist of PPRC-XD and FlashCopy), asynchronous (but consistent) copy on unlimited distance. To be honest, both HDS and Dell/EMC also complicated their names. Not to mention HDS is not Hitachi, but Hitachi also delivers arrays for HP (HPE). And there is also new player from Moshe Yanai, Infinidat, AFAIK. And there are/were smaller players. -- Radoslaw Skorupka Lodz, Poland W dniu 13.07.2020 o 18:39, Jackson, Rob pisze: > Ah, the constant rebranding and re-lingo-ing. It must really help sales. > The last time I had IBM storage, Global Mirror was PPRC/XD and "z/OS Global > Mirror" was GDPS/XRC. And Metro Mirror was PPRC synchronous. I can't see > how GDPS/XRC would work with non-unique addresses--at least between primary > and secondary, since they're both online to the SDMs (right? getting fuzzy > on it). Currently we use HUR (love it), but I don't believe it would work > with non-unique addresses either. > > First Horizon Bank > Mainframe Technical Support > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On > Behalf Of Jesse 1 Robinson > Sent: Monday, July 13, 2020 12:27 PM > To: [email protected] > Subject: Re: Two Processors and One IODF > > [External Email. Exercise caution when clicking links or opening > attachments.] > > We mirror with XRC, which I believe is Global Mirror. (I cannot keep the > current lingo straight.) In my shop, we have a business need to put any > device--DASD or tape--online to any LPAR regardless of location. In order to > do that, device addresses *must* be unique. If you have absolutely no need to > do that, then I don't think uniqueness is required. OTOH is costs little to > make them unique. If you don't do it from the get-go, it will be very > difficult in the future. > > . > . > J.O.Skip Robinson > Southern California Edison Company > Electric Dragon Team Paddler > SHARE MVS Program Co-Manager > 323-715-0595 Mobile > 626-543-6132 Office ⇐=== NEW > [email protected] > ====================================================================== Jeśli nie jesteś adresatem tej wiadomości: - powiadom nas o tym w mailu zwrotnym (dziękujemy!), - usuń trwale tę wiadomość (i wszystkie kopie, które wydrukowałeś lub zapisałeś na dysku). Wiadomość ta może zawierać chronione prawem informacje, które może wykorzystać tylko adresat.Przypominamy, że każdy, kto rozpowszechnia (kopiuje, rozprowadza) tę wiadomość lub podejmuje podobne działania, narusza prawo i może podlegać karze. mBank S.A. z siedzibą w Warszawie, ul. 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