The online migration feature provides a method to migrate a native file system to the VxFS file system. The native file system is referred to as source file system and the VxFS file system as referred to as the target file system. The migration takes minimum amounts of clearly bounded, easy to schedule downtime. Online migration is not an in-place conversion and requires a separate storage. During online migration the application remains online and the native file system data is copied over to the VxFS file system. Both of the file systems are kept in sync during migration. This makes online migration back-out and recovery seamless. The online migration tool also provides an option to throttle the background copy operation to speed up or slow down the migration based on your production needs.

Figure: Migration process illustrates the overall migration process.

You can migrate JFS and JFS2 file systems.