SAP Basis Tech Supports

Symptom

You have installed BI Accelerator (BIA).
Other terms

high availability, backup and restore, disaster recovery, downtime, maintenance work, support packages, blades, switch-over, blade installation, index server, BIA index, patches, landscape, TREX admin tool (stand-alone), BIA monitor, disaster tolerant, disaster tolerance
Reason and Prerequisites

TREX is the underlying engine for the BI Accelerator. BI Accelerator is part of the scenario variant Running a Data Warehouse, Process Performance Optimization which belongs to the IT scenario Enterprise Data Warehousing. A TREX aggregation engine for processing structured business data is powering these capabilities. The data of the BI InfoCubes are replicated to the TREX engine and are stored as TREX indices. The BI Accelerator clearly reduces the response time, specially for large data volumes.
NOTE: The backup and recovery functionality is not generally available;
please see note 1077439 for further details.
Solution

The document “BI Accelerator (BIA) High Availability” attached to this note describes the concepts that the BI Accelerator (BIA) provides for minimizing downtimes and ensuring high availability.
Note:In principle, high availability is not part of the BI Accelerator (BIA) as an appliance but can be implemented on a project basis. The BIA hardware partners are responsible for high availability of the storage and network infrastructure. Equally, sizing and in particular sizing and configuration of a highly-available landscape are the responsibility of the BIA hardware partners. SAP only provides the concepts of high availability for the BI Accelerator.