title: Data Migration from Java Hibernate SQL Server to Python Mongo Stack
body: <p>I have one live website with multiple active users(around 30K) and each of them have their own configuration to render there homepages. The current stack of the portal is Java Spring Hibernate with SQL Server. Now, we have re written the code in Python MongoDB stack and want to migrate our users to new system. The issue here is that the old and new code will be deployed on the separate machines and we want to run this migration for few users as part of Beta Testing. Once the Beta testing is done, we will migrate all the users.</p>
  
  <p>What would be the best approach to achieve this? We are thinking about dumping the data in alternative file system like XML/JSON on a remote server and then reading it in the new code.</p>
  
  <p>Please suggest what should be the best way to accomplish this task</p>