Thanks Hayim,
That was my experience. I inherited RACF at my old shop, and never thought much 
about the sharing setup; it worked fine.
We had one box, w Prod/Test/Tech LPARs, and one RACF. No problems.
It’s good to know the options.

Sent from [Proton Mail](https://proton.me/mail/home) for iOS

On Tue, Jul 23, 2024 at 11:21 AM, Hayim Sokolsky 
<[[email protected]](mailto:On Tue, Jul 23, 2024 
at 11:21 AM, Hayim Sokolsky <<a href=)> wrote:

> Normally I'd recommend asking this question in the RACF-L.
>
> RACF has supported sharing the RACF Database long before the existence of GRS 
> or Sysplex. The critical rule is that the RACF Database must be shared the 
> same way across all the systems using that RACF Database. The ways of sharing 
> are:
>
> 1. Shared disk with Reserve/Release - this is what RACF did prior to sysplex.
> 2. Simple sharing within a sysplex without a coupling facility - 
> SYSPLEX(NODATASHARING)
> 3. Sysplex with a coupling facility - SYSPLEX(DATSHARING)
>
> As long as all systems have the same setup listed above, things work fine. 
> However, if some systems are using SYSPLEX (DATASHARING or NODATASHARING) and 
> others are not using SYSPLEX, the RACF Database will quickly get destroyed 
> because they are not serializing changes the same way. Once broken, there is 
> no remedy except restoring an old copy of the RACF Database prior to the 
> damage.
>
> Hayim Sokolsky (he/him/his)
> Director, Software Engineering
> Rocket Software, USA
> E: [email protected]
> W:RocketSoftware.com
>
> The views I have expressed in this email are my own personal views, and are 
> not endorsed or supported by, and do not necessarily express or reflect the 
> views, positions, or strategies of my employer.
>
> -----Original Message-----
> From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
> Peter
> Sent: Tuesday, July 23, 2024 12:49 AM
> To: [email protected]
> Subject: Sharing RACF DB in monoplex
>
> EXTERNAL EMAIL
>
> Hello
>
> Good evening
>
> Is it possible to share one RACF DB in a monoplex environment of 4 LPARS ?
> Without using RRSF and making GRS for serialization across the 4 LPARS
>
> Any experience or advise is much appreciated
>
> Peter
>
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