To merge two JIRA instances, you will have to perform a project import from the source instance to target instance. With a project import, you will have to manually create all the configurations on your target instance.
Read more about project imports at https://confluence.atlassian.com/display/JIRA/Restoring+a+Project+from+Backup
You also have the option of using https://marketplace.atlassian.com/plugins/com.awnaba.projectconfigurator.projectconfigurator to simplify creating the project configuration instead of doing it manually.
JIRA Agile data is tricky. It is currently not supported. You will have to write some custom code to do this. There is a feature request that you might want to vote on https://jira.atlassian.com/browse/JRA-28748
Thanks Bhushan for the reply. I was just wondering if I compare source activeobjects.xml with target activeobjects.xml and copy the needed xml block from the source to target, some amount of find and replace to maintain the object relationship with projects, issues etc will work?
merging two (or more) Jira-Instances into one is quite complex... We have the same problem in our environment...
Our main-problem is that both JIRA have different Fields, Worfklows, IssueTypes etc. And of course all with different IDs.
We start a project in January 2015 where we want to discuss how we will try to merge our projects. If we deceide to merge old projects to a new (clean and fresh installed) JIRA we will need help by an expert.
At Summit I talked to some of them which had solutions for exact that problem (different configurations wehre you can't use the Jira-Default Project-Import).
Kind regards and good luck for your Merge
For JIRA Agile (and for a other plugins that use AO), you will need custom scripts. We, Go2Group, have done that for a few customers. Depending on the version of the plugins, you might need some adjustments though. For example, we had to change the scripts for accommodating the new Lexo ranking in JIRA Agile!
Migrating data is one option, another might be consolidating data by showing on one board data from different Jira isntances with help of addons like WatchTower for Jira https://marketplace.atlassian.com/plugins/com.rozdoum.watchtower/cloud/overview
Please check if it works for your cases
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