GarbageCollect removes a key as described in section 3.1 "How to delete a record" in the paper.

GrowCluster adds the target acceptor to the cluster of proposers.

IsRetryable indicates the error, received from the GarbageCollect function, is non-terminal, and the client can retry the operation.

NewMemoryAcceptor returns a usable in-memory acceptor.

NewMemoryProposer returns a usable proposer uniquely identified by id.

ShrinkCluster removes the target acceptor from the cluster of proposers.

ErrAcceptFailed indicates a failure during the first "accept" phase.

ErrDuplicate indicates the same acceptor was added twice.

ErrNotEqual indicates the tombstone value sent as part of a delete request doesn't correspond to the stored value we have for that key.

ErrNotFound indicates an attempt to remove a non-present acceptor.

ErrPrepareFailed indicates a failure during the first "prepare" phase.

Age of a proposer, incremented by GC process.

AgeError is returned by acceptors when there's an age conflict.

Ballot models a ballot number, which are maintained by proposers and cached by acceptors.

ConflictError is returned by acceptors when there's a ballot conflict.

MemoryAcceptor persists data in-memory.

MemoryProposer (from the paper) "performs the initialization by communicating with acceptors, and keep minimal state needed to generate unique increasing update IDs (ballot numbers).".

Tombstone represents the terminal form of a key.

Accepter models the second-phase responsibilities of an acceptor.

Acceptor models a complete, uniquely-addressable acceptor.

AcceptorLister allows operators to introspect the state of proposers.

Addresser models something with a unique address.

ConfigurationChanger models the grow/shrink cluster responsibilities of a proposer.

FastForwarder models the garbage collection responsibilities of a proposer.

Preparer models the first-phase responsibilities of an acceptor.

Proposer models a concrete proposer.

RejectRemover models the garbage collection responsibilities of an acceptor.

StateWatcher watches a key, yielding states on a user-supplied channel.

ChangeFunc models client change proposals.