Migrating from very old Bitbucket version to latest

[sedai77]

Hello all, I have a Bitbucket data center instance which is very old version 4.14.1. We are now trying to stand up a brand new server to host the latest version of Bitbucket. But we need to migrate existing data in the Postgres DB and repositories from the old bitbucket to new server. 

I noticed there are many differences in the database structures between the version and also there might be differences on how repositories are store in the file system. 

Anybody has experience on upgrading from really old version? Is it even possible? 

Thanks in advance.  

[Aron Gombas _Midori_]

This is absolutely possible, but it very likely requires multiple steps! I mean instead of upgrading from your very old version to the latest version, you would upgrade from your very old version -> version X -> version Y -> ... -> latest version.

Of course, it is important to minimize the number of steps required, so you should invest into setting up a plan by reading the upgrade guides provided. A rather sensible approach could be upgrading from one LTS to the next until you reach the latest one.