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
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