On 5/28/2015 9:20 PM, J O Skip Robinson wrote:
I'm sure that GDPS can do more than what we use it for. We mirror and recover
parallel sysplexes as well between data centers. Even if I had only monoplexes
mission critical to my business, I would still use DASD mirroring (XRC or
whatever) and recover at a 'cool' site via GDPS, which handles DASD and CECs
alike. In my view, what's truly crucial to a business is data. I need to IPL a
system to resume business with data intact. If a few hours elapse, so be it.
Compare that with the ancient goal (wish) of restoring data from tape. Hopeless.
The thought of running a parallel sysplex across data centers 100+ KM apart
gives me the freaking heebie-jeebies. Even if my communication (DWDM) were
absolutely 100% reliable, where would my data actually live? Volume ABC123
lives at one data center or the other. If the owning data center fails, my
sysplex is toast. If I mirror ABC123, I can only update one copy or the other.
I can't update both or I'll screw the 'other' guy. Maybe there are technical
answers that I don't understand. I stand to be educated.
.
.
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J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
626-302-7535 Office
323-715-0595 Mobile
[email protected]
Skip,
IBM just announced multi-target PPRC, so you can do multiple copies to
different places. GDPS is working to add the support for it.
Regards,
Tom Conley
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