Enabling High Availability and Data Consistency Features

The fault tolerance and the high-availability features of LightDB-A Database can be configured.

Important When data loss is not acceptable for a LightDB-A Database cluster, LightDB-A coordinator and segment mirroring is recommended. If mirroring is not enabled then LightDB-A stores only one copy of the data, so the underlying storage media provides the only guarantee for data availability and correctness in the event of a hardware failure.

The VMware LightDB-A on vSphere virtualized environment ensures the enforcement of anti-affinity rules required for LightDB-A mirroring solutions and fully supports mirrorless deployments. Other virtualized or containerized deployment environments are generally not supported for production use unless both LightDB-A coordinator and segment mirroring are enabled.

For information about the utilities that are used to enable high availability, see the LightDB-A Database Utility Guide.

• Overview of LightDB-A Database High Availability

• Enabling Mirroring in LightDB-A Database

• How LightDB-A Database Detects a Failed Segment

• Understanding Segment Recovery

• Recovering from Segment Failures

• Recovering a Failed Coordinator

Parent topic: Managing a LightDB-A System