Replication & High Availability

NeorunBase provides fault tolerance and high availability through shard replication and automatic failure recovery.

Shard Replication

Each shard can be configured with a replication factor. NeorunBase maintains multiple copies of each shard across different Data Nodes. This ensures that data remains available even if one or more Data Nodes go down.

Automatic Failure Detection

NeorunBase continuously monitors the health of all Data Nodes. When a Data Node becomes unavailable, the system automatically detects the failure and initiates recovery actions.

Automatic Shard Repair

When a Data Node failure is detected, NeorunBase automatically replicates the affected shards from surviving replicas to healthy Data Nodes, restoring the desired replication factor without manual intervention.

Shard Rebalancing

When Data Nodes are added to or removed from the cluster, NeorunBase automatically rebalances shards across the cluster to ensure even data distribution and optimal resource utilization.

Coordinator High Availability

Multiple Coordinators can run simultaneously. NeorunBase uses leader election to designate a primary Coordinator for metadata management, while all Coordinators can serve client queries. If the leader Coordinator fails, a new leader is automatically elected.