You can find information about disaster recovery in the following sources:
For Oracle TimesTen, you must carefully manage the way in which an Oracle BI repository and aggregates are replicated from the main site to the disaster recovery site. You must exactly mirror on the disaster recovery site system the sequence of operations that you apply on the production system for the repository and aggregates, in particular:
When a new repository is uploaded to the production system, then the same repository must be uploaded on the disaster recovery site system.
When aggregate scripts are run against the production repository and instances of Oracle TimesTen, then the same aggregate scripts must be run against the disaster recovery site system.
For information, see "Using Oracle BI Summary Advisor to Identify Query Candidates for Aggregation" in Oracle Fusion Middleware Metadata Repository Builder's Guide for Oracle Business Intelligence Enterprise Edition.