consistency

Documentation

Index

• type Level
  • func FromString(s string) (Level, bool)
  • func (l Level) N(total int) int
  • func (l Level) String() string

Types

type Level

type Level int

Level defines Cassandra-like consistency levels.

const (
	// One implies that an acknowledgement from a single node is enough to complete the operation.
	One Level = iota
	// Two needs acknowledgement from at least two nodes to complete the operation.
	Two
	// Quorum needs acknowledgement from N/2+1 of nodes to complete the operation.
	Quorum
	// All requires acknowledgement from ALL nodes.
	All
)

func FromString

func FromString(s string) (Level, bool)

func (Level) N

func (l Level) N(total int) int

N returns how many replicas are needed to satisfy the consistency level if there are n replicas in total. Note that the returned number can be greater than total number of nodes. For example the consistency level Two always requires two nodes even if total number of nodes is 1.

func (Level) String

func (l Level) String() string

String returns string representation of the consistency level.