Replying to the original question. There may well be a better way to manage DR
than what we do, but we have not been pitched one in 20+ years. We own both
PROD and DR data centers and all contents. The DR site runs XRC ('Global
Mirroring for Z', a truly execrable name). Its only job in life is to pull data
from PROD and continuously update a full set of secondary volumes that
correspond to the full set of primary volumes. It runs on one general purpose
CP supported by enough CBU to mimic a full set of DR LPARs including CFs. When
we're ready for a test, we push a GDPS button to FLASH the secondary volumes
over to a tertiary set and make them look (almost) exactly like the primary
set. We IPL and run from the tertiary set. Meanwhile mirroring continues to the
secondary set so at any moment we could enter a real DR with no data loss.
The z/OS license on the DR box is ' ZNALC', which allows us to run DR but no
portion of production or application development. Even the skinflint bean
counters are satisfied that this is a good deal. We don't have to pay any third
party for resources. Nor do we have to schedule test windows. And most
important of all, in the case of a regional disaster--for SoCal read
earthquake--we would not have to compete with other clients for DR run time.
If you're looking for some 'other way' to manage DR, be sure that these issues
are accounted for. Or else not critical for your enterprise.
.
.
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 [mailto:[email protected]] On Behalf
Of Ambros, Thomas
Sent: Wednesday, February 20, 2019 11:01 AM
To: [email protected]
Subject: (External):Disaster recovery, alternatives to CBU machine in alternate
site
Currently we're handling our hardware or site level disaster recovery with an
essentially cold machine in an alternate site, a CBU entitlement allows us to
spin it up and run recoveries. We've been pitched CMP (Country multiplex
pricing) because there is a potential requirement to be able to run out of one
site or another for a period of months. One assumption is that the capability
stays in house.
I've been asked to solicit this list for answers to a couple of questions. Are
there alternatives to either of these arrangements that allows a customer to
support production processing capacity in two sites without incurring the extra
cost of CMP, or even the CBU? If you've implemented CMP, did it have an
effect on your expenses one way or another?
I don't know if these are appropriate questions in this forum but if they are
I'd be grateful to learn of alternatives we should look into.
<snip>
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