If the hardware component or server where a cluster node is running fails, Exasol detects that a node is no longer available and triggers an automatic failover procedure. If the volumes have been configured with redundancy, the metadata on each node is replicated to mirrors on neighboring nodes, which means that data integrity is preserved on node failure.
This section describes the different mechanisms for fail safety in cloud deployments and on-premises installations of Exasol.
- Fail Safety (Cloud): How fail safety works in Exasol cloud deployments.
- Fail Safety (On-Prem): How fail safety works in Exasol on premises installations.