2 parallel PI production running systems possible? We plan upgrade/migration.

[former_member560382]

Hi experts,

as we plan the PI upgrade from 7.4 dual stack to 7.5 single stack, I was wondering if it is possible to have 2 production PI systems (environments) in parallel. The plan is to create 7.5 as separate systems (DEV, QA, PRD) and then continuously migrate interfaces from 7.4 to 7.5.

My question is, is this possble? For example scenarios with client ABAP proxies. Let's imagine I have some of interfaces migrated, some not yet. How will SAP ECC know, to which PI system to forward the requests to? (The same for example for RFC calls from ECC to PI)
Or do we need to migrate interfaces and then do a big-bang switch from 1 PI system to the new one?

Thanks for help,

Peter

[former_member560382]

Gents, any other hints? I'm sure many of you have done upgrade/migration from double stact to single stack..

Thanks in advance!

[marksmyth · Accepted solution]

Hello Peter,

It is possible to have 2 PRD systems running in parallel. Check the notes below which provide details on sending proxy data to 2 separate PI systems and also the limitations/restrictions of using the IS_URL parameter.

1334174 Interface-specific IS_URL parameter
2116345 XI RUNTIME: IS_URL with several central Integration Servers

Regards
Mark

[Ryan-Crosby]

Hi Peter,

We have something of that nature where we have two systems sharing a single central ESR. Initially it was supposed to be a decentralized setup for the second box with the intention that the second box is for physical redundancy (The gotcha here is that when the primary comes down you cannot make any integration directory changes in the second system so care has to be taken that we keep them in sync). Regarding the ABAP proxies the inbound stuff is straightforward, but for any outbound proxies you can only have one integration engine. I have seen reference to a type of setup where you can make decisions regarding where to forward the proxy traffic, but have never seen that in action. When we are conducting maintenance on our primary system we are able to flip our traffic over to the secondary until the maintenance is done and then we flip the traffic back.

Regards,

Ryan Crosby

[former_member560382]

Thanks Ryan, at least a bit hope it might be possible 🙂