ViewstampedReplication (viewstamped_replication v0.2.0)

Protocol-generic Viewstamped Replication runtime.

Summary

Executes a linearizable state-machine read without appending to the VSR log.

@spec command(term(), term(), keyword()) :: {:ok, term()} | {:error, term()}

@spec primary(term(), term()) :: {:ok, term()} | {:error, :not_found}

@spec read(term(), term(), keyword()) :: {:ok, term()} | {:error, term()}

Executes a linearizable state-machine read without appending to the VSR log.

The current primary confirms its view with a quorum before evaluating the read. Singleton groups satisfy that quorum locally.

@spec snapshot(term(), term()) :: :ok | {:error, term()}

@spec start_replica(keyword()) :: {:ok, pid()} | {:error, term()}

@spec status(term(), term()) :: {:ok, map()} | {:error, :not_found}

@spec stop_replica(term(), term()) :: :ok | {:error, :not_found}