canonical/dqlite
Dqlite
dqlite is a distributed SQL database that embeds a relational database engine to provide replicated storage across a cluster of nodes. It functions as a replicated SQL engine designed to ensure data remains available and consistent during node failures.
The system utilizes a consensus algorithm to manage leader election and synchronize a replicated log across the cluster. This approach enables automatic cluster failover and leader promotion to maintain continuous service without manual intervention.
The project covers state machine replication, network-based cluster membership, and transaction log persistence for data durability. It includes administrative interfaces for managing the addition and removal of voting members within the distributed environment.
Features
- Distributed SQL Databases - Provides a relational database engine designed to scale horizontally while maintaining transactional consistency across a distributed cluster.
- Automatic Failover Controllers - Monitors database health and automatically promotes standby nodes to primary roles during failures.
- Database Replication - Implements a network protocol to synchronize database records across multiple nodes for high availability.
- Distributed SQLite Replications - Integrates a distributed SQLite variant to replicate database state across cluster members for fault tolerance.
- Embedded SQL Engines - Embeds a relational database engine on each node to handle local data persistence and SQL execution.
- Distributed Leader Election - Implements a distributed process coordination mechanism to ensure a single active leader among multiple cluster replicas.
- Database High Availability - Coordinates database nodes to ensure continuous service through automated failover and leader election.
- Consensus Log Replication - Uses quorum-based consensus to distribute and synchronize transaction log entries across the cluster.
- Automated Promotions - Automatically promotes a new leader when the primary instance becomes unavailable to ensure continuous service.
- Cluster State Synchronization - Synchronizes active SQL state across cluster nodes to ensure consistency during failover.
- Raft Consensus Implementations - Utilizes the Raft protocol to manage replicated logs and handle leader election for cluster consistency.
- Replicated State Machines - Maintains identical database state across nodes by applying a strictly ordered sequence of committed transactions.
- Dynamic Cluster Membership Management - Provides mechanisms to dynamically add or remove voting nodes from the cluster without interrupting operations.
- Transaction Recovery Logs - Writes transaction logs to permanent storage to ensure data durability and facilitate fast system recovery.
- Fault-Tolerant Coordinators - Ensures transaction durability and availability using quorum-based consensus and automatic leader failover.
Star history
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