You can't you full restore to merge two instances. It will wipe the target instance.
Let us say you want to merge A and B.
The actual merge could be simple or complex procedures. You may need to match the JIRA versions also.
We are planning to merge the instance-2 (ver 6.7.16) to instance-1(ver 7.1.2).
Instance-2 is of 100 user license and instance-1 is of 25 user license.
Is there a guide book or information on how to merge these 2 instances?
Is there a possible data loss for this activity?
How to take care to avoid the data loss if any?
Are all the fields/options/customs/permissions/integrated tools still remains ok without any issue?
I did a two JIRA server merge of two instances recently using add-on "Project Configurator". The add-on works awesome and very quick, one shot.
* Took around 1-2 hrs of effort for final merge after all initial trials and confirms that data will be there
* The passwords, avatar's of 2nd instance will not be imported to final JIRA (merged one) when completed
* So far looks good and still on observation. Hope all will be good and no issues w.r.t data
Best part is, it's all taken care by tool itself. I too had so many questions before doing it on test machine, but when did few times and confirmed that nothing is missing and no overwrite, then planned on production JIRA and successful.
I faced issue of importing attachments but I got work around from respective tool support and helped to overcome.
I have documented the steps which I have followed, I can share if required. Its not so extensionsive but may help @ some extent.
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