You should always read the upgrade instructions, and you absolutely must read the release notes for each version you're going through (not the point releases, but you really should read the notes for 5.0, 5.1, 6.0, 6.1 and 6.2)
I meant, currently i have 2 jiras
one is latest 6.2 and another is 4.4.4 and i want to migrate 4.4.4 to 6.2
My question is - Shall I upgrade it and then migrate or directly migrate to 6.2
I guess i have to first upgrage to the version where i want to migrate
please let me know your thougts?
Ohh, I see, sorry.
It's slightly different use of English than I'm used to. Migrate to me means "move from one place to another", and I'd use "upgrade" for changing the versions, and "merge" for taking stuff from one instance and putting it into another one.
You are right about the merge of Jira installations - if you're going to use the built-in project import, they need to be the same version.
In your case, I would
Yes. But I'd treat it as a distinct separate step. If you were just copying the existing 4.4.4 data, you can just grab a copy of the database and restore it into a new area.
To change the database, you'll need to configure the target Jira to use it, and then the easiest route would be to export your 4.4.4 data to xml and import it into the empty mysql-backed Jira.
I always recommend to install another instance, and import your data to the new instance, so you will have a most recent version and also will keep the previous one as a backup in case something goes wrong:
These are my recommended steps for upgrade:
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