1.2.1 Reliability, Modularity, and Cost-Effectiveness

Oracle Exadata Storage Server employs cost-effective modular storage hardware in a scale-out architecture enabling high availability and reliability.

Oracle Exadata Storage Server is architected to eliminate single points of failure by mirroring data, employing fault isolation technologies, and protecting against disk and other storage hardware failures. Even brownouts are limited or eliminated when failures occur.

In the Oracle Exadata Storage Server architecture, multiple storage servers provide a pool of storage to support one or more databases. Intelligent software automatically and transparently distributes data evenly across the storage servers. Oracle Exadata Storage Server supports dynamic disk replacement, and Oracle Exadata System Software provides online dynamic data redistribution, which ensures that data is balanced across the storage without interrupting database processing. Oracle Exadata Storage Server also provides data protection from disk and storage server failures.