LOL, maybe so.  And do most z/OS installations have that full redundancy?

---
Bob Bridges, [email protected], cell 336 382-7313

/* The Internet is the first thing that humanity has built that humanity 
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-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Bill Johnson
Sent: Tuesday, May 23, 2023 17:22

Bob needs to get into the 21st century.

--- On Tuesday, May 23, 2023, 5:20 PM, Pommier, Rex <[email protected]> 
wrote:
I think what it means is that you will only "suffer" .3 seconds of application 
outage in a year.  Of course that means you have a fully redundant SYSPLEX set 
up with duplicated everything such that when you do have to bring down a CEC, 
the application workload is pushed to a different node and keeps running.  

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Bob 
Bridges
Sent: Tuesday, May 23, 2023 4:14 PM

I'm just getting around to reading the article someone cited here:

  
https://urldefense.com/v3/__https://www.linkedin.com/pulse/results-mainframe-application-modernization-migration-ross-mauri/

I heard that "8 9s" claim go by before, but I didn't pay much attention.  But 
in the article it says that equates to 0.3 sec of downtime per year, and I 
pause.

Does "down time" not include IPL, then?  When you IPL, doesn't that count as 
"down"?  Because if it doesn't, I don't see what use that measure is.  Or does 
no one IPL any more?

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