I have GoldenGate version 11.1 on my z/OS and Linux servers. I need to upgrade the GoldenGate to version 12 on both the servers. The database that GG is interacting is DB2. I looked up on the internet for the instructions but to me they seem little complex. My question is if it is possible for a standard GoldenGate developer to install/upgrade its version on both the servers or I will need a consultant from Oracle to do this activity for me? The good part of calling a Oracle consultant is I will get a lot of learning but the con is they charge a lot for this activity.
Please suggest.
Upgrading a replication system is not a straightforward task. As you have mentioned, there are many thing you need to be aware of. You need first to plan the upgrade process, test it and as a final task, implement it on the production replication system.
For example, GoldenGate 12 has different default values for some parameters than GoldenGate 11. You might need to check the PRM files and adapt them to the never version.
Everything about the upgrade process is written in the documentation and in the Oracle MOS notes. It is possible that all the work that is done during the upgrade is made by a mortal person.
You have to choose by yourself what level of risk you are willing to accept. And make a plan what to do if something goes wrong.