Consolidating multiple JIRA instances
The process of consolidating multiple JIRA instances is exactly the same as the migration process described in Migrating JIRA projects.
For the complete documentation on Migrating JIRA projects, see here.
While the end result is different, the approach, tools, planning and overall staging procedure is the same. To consolidate multiple JIRA server into one, you need to use the Configuration Manager for JIRA to merge system and project level configuration data, user-generated data, 3rd party add-on configuration and other related information. To ensure consistency in your merger, a comprehensive analysis, testing and staging of the consolidation efforts should be performed prior to rolling out the changes of your final merger. Any errors, gaps, conflicts and merge-specific issues that you identify should be resolved during the analysis phase of the consolidation process.
If you face any challenges during your consolidation efforts or cannot resolve the problem on your own, feel free contact us for assistance through the following communication channels: