Suggestion Description

It has been painful for customers with large dataset to migrate from an external database to another, for example, migrate from MySQL to PostgreSQL. The current process consists of taking an XML backup and creating a new database on the new database server to house Jira's data and then, after import is done, point the existing instance to the new database. Problem here is that XML Backups for large instances may take days and during these days, new data is being written to the instance, since huge instances can't be turned into read-only instances. It would be good to have a Migration Wizard Tool to migrate data from one database to another through Jira UI.

Suggestion Details

BitBucket is an application that has this implementation and that allows administrators to easily migrate from one external database to another. Process is documented in the Using the Database Migration Wizard BitBucket documentation.
If we can implement something similar for Jira, it would help customers.

This would provide a supported migration path and reduce the complexity and risk associated with migrating the data to another database.