Migration mammoth data

I am migrating the octopus deploy from old server to new azure server. The tool was being used for more than 6 years. When i am migrating using Octopus.Migrator it is taking extremely long. Is there any way to do it quickly. I have no objection in loosing the data for initial 3 years (lets say). Please suggest something.

We don’t recommend using the migrator for that purpose. Believe it or not, the migrator was originally written to help folks migrate from 2.6.5 (RavenDB) to 3.x (SQL Server)! Data migration - Octopus Deploy

When moving servers like you are attempting we recommend following these steps: Moving the Octopus Server and database - Octopus Deploy