pril 21, 2023 10:23 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Do you need a coupling facility to implement DVIPA?
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Thanks Timothy for confirming that. We are planning to implement a sysplex
where we want a critical application to have high availability without a
parallel sysplex. The solution being discussed is to install the
application on two LPARs but have it active only one at any time due to
dataset sharin
Here's a quote pulled from an older IBM redbook:
"Note: Dynamic VIPA and Sysplex Distributor capabilities do not rely on data
stored in structures in the Coupling Facility. Therefore, they can be
implemented using XCF communication without a Coupling Facility (also called
Basic Sysplex connecti
That is what I thought but I get confused since whenever I look at DVIPA
discussions like this
https://www.ibm.com/docs/en/zos-basic-skills?topic=addressing-unique-application-instance-dvipa
it always shows a CF.
But in this preso from IBM at Share
https://share.confex.com/share/125/webprogram
Not 100% sure, but based on this, likely not.
In order for TCP/IP to communicate DVIPA status among LPARs, TCP/IP uses an XCF
group called EZBTCPCS. There's no mention of a coupling facility structure as a
requirement.
Mark Jacobs
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GPG Publi
Looking at implementing a basic sysplex where an application will be able
to run on two different LPARs but only on one instance at a time.
Since it's difficult to change the advertised IP for the application/LPAR
we plan to use DVIPA.
Is this possible without a coupling facility and only the TCP
