Objectivity/HA - The High Availability Option

Objectivity/DB High Availability assures data and business-critical application availability despite network or system failures.

By replicating schema, data dictionaries, lock servers and (optionally) databases, Objectivity/DB provides fault isolation and improved transaction performance. Using Objectivity/HA administration tools or a C++, Java or command line API, Objectivity/DB databases can be organized into logical, geographic, or functional groups called "partitions" that operate autonomously.

Users within each partition remain insulated from network or system failures in distributed environments that include LANs and WANs; they can continue to access information managed locally despite failures outside the partition. Partitions may be dynamically reconfigured as off-line or on-line to regulate access in real time.

Features

Fault isolation via autonomous partitions
Runtime configuration with administration tools and C++, Java and command line APIs
Support for an unlimited number of users
Public and private operation of partitions
Database locks maintained by local lock server
Synchronous data replication
Automatic resynchronization of off-line databases
Dynamic quorum calculation mechanism
Multiple database images can be stored near remote users
Variable weighting of database replicas supports both master/slave and peer-to-peer configurations
Variable granularity of replication
Tie-breaker mechanism
Replication configuration transparent to applications

Benefits

High Availability of business-critical applications and data
Tolerance of hardware and network failures
Ease of Administration
Scalability
Flexibility
Improved Performance
Data integrity assured
Availability for both reads and updates, even when some replicas are unavailable
Improved read performance
Application requirements determine configuration, not database architecture
Hot-failover