Chapter 13. Backup and Restore

For example, the application or the process it is running in might stop unexpectedly, the hardware on which the process is running might fail, or the persistent store might have a catastrophic failure (although this would most likely be backed up already).

For example, backups of a running repository can be used to transfer content to a new repository hosted in a different location. It might be possible to manually transfer the persisted content (for example, in a database or on the file system), but the process of doing so varies for different persistence options.

For example, the hierarchical database can be configured to use a distributed in-memory data grid that already maintains its own copies for ensuring high availability, and therefore the data grid might not persist anything to disk. In such cases, content is stored on the data grid's virtual heap, and getting access to it without the hierarchical database may be difficult.

For example, you may initially configure your repository to use a particular persistence approach but, over time as the repository grows, you want to move to a different, more scalable (but perhaps more complex) persistence approach.

Finally, the backup and restore feature can be used to migrate to a new major version of the hierarchical database.