Documentation
¶
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type BinarySlush ¶
type BinarySlush interface {
fmt.Stringer
// Takes in the initial choice
Initialize(initialPreference int)
// Returns the currently preferred choice to be finalized
Preference() int
// RecordSuccessfulPoll records a successful poll towards finalizing the
// specified choice
RecordSuccessfulPoll(choice int)
}
BinarySlush is a slush instance deciding between two values. After performing a network sample of k nodes, if you have alpha votes for one of the choices, you should vote for that choice.
type BinarySnowball ¶
type BinarySnowball interface{ BinarySnowflake }
BinarySnowball augments BinarySnowflake with a counter that tracks the total number of positive responses from a network sample.
type BinarySnowflake ¶
type BinarySnowflake interface {
fmt.Stringer
// Takes in the beta value, and the initial choice
Initialize(beta, initialPreference int)
// Returns the currently preferred choice to be finalized
Preference() int
// RecordSuccessfulPoll records a successful poll towards finalizing the
// specified choice
RecordSuccessfulPoll(choice int)
// RecordUnsuccessfulPoll resets the snowflake counter of this instance
RecordUnsuccessfulPoll()
// Return whether a choice has been finalized
Finalized() bool
}
BinarySnowflake is a snowball instance deciding between two values After performing a network sample of k nodes, if you have alpha votes for one of the choices, you should vote for that choice. Otherwise, you should reset.
type Consensus ¶
type Consensus interface {
fmt.Stringer
// Takes in alpha, beta1, beta2, and the initial choice
Initialize(params Parameters, initialPreference ids.ID)
// Returns the parameters that describe this snowball instance
Parameters() Parameters
// Adds a new choice to vote on
Add(newChoice ids.ID)
// Returns the currently preferred choice to be finalized
Preference() ids.ID
// RecordPoll records the results of a network poll. Assumes all choices
// have been previously added.
RecordPoll(votes ids.Bag)
// RecordUnsuccessfulPoll resets the snowflake counters of this consensus
// instance
RecordUnsuccessfulPoll()
// Return whether a choice has been finalized
Finalized() bool
}
Consensus represents a general snow instance that can be used directly to process the results of network queries.
type Factory ¶
type Factory interface {
New() Consensus
}
Factory returns new instances of Consensus
type Flat ¶
type Flat struct {
// contains filtered or unexported fields
}
Flat is a naive implementation of a multi-choice snowball instance
func (*Flat) Initialize ¶
func (f *Flat) Initialize(params Parameters, choice ids.ID)
Initialize implements the Consensus interface
func (*Flat) Parameters ¶
func (f *Flat) Parameters() Parameters
Parameters implements the Consensus interface
func (*Flat) Preference ¶
Preference implements the NnarySnowball interface
func (*Flat) RecordPoll ¶
RecordPoll implements the Consensus interface
func (*Flat) RecordSuccessfulPoll ¶
RecordSuccessfulPoll implements the NnarySnowball interface
type FlatFactory ¶
type FlatFactory struct{}
FlatFactory implements Factory by returning a flat struct
type NnarySlush ¶
type NnarySlush interface {
fmt.Stringer
// Takes in the initial choice
Initialize(initialPreference ids.ID)
// Returns the currently preferred choice to be finalized
Preference() ids.ID
// RecordSuccessfulPoll records a successful poll towards finalizing the
// specified choice. Assumes the choice was previously added.
RecordSuccessfulPoll(choice ids.ID)
}
NnarySlush is a slush instance deciding between an unbounded number of values. After performing a network sample of k nodes, if you have alpha votes for one of the choices, you should vote for that choice.
type NnarySnowball ¶
type NnarySnowball interface{ NnarySnowflake }
NnarySnowball augments NnarySnowflake with a counter that tracks the total number of positive responses from a network sample.
type NnarySnowflake ¶
type NnarySnowflake interface {
fmt.Stringer
// Takes in beta1, beta2, and the initial choice
Initialize(betaVirtuous, betaRogue int, initialPreference ids.ID)
// Adds a new possible choice
Add(newChoice ids.ID)
// Returns the currently preferred choice to be finalized
Preference() ids.ID
// RecordSuccessfulPoll records a successful poll towards finalizing the
// specified choice. Assumes the choice was previously added.
RecordSuccessfulPoll(choice ids.ID)
// RecordUnsuccessfulPoll resets the snowflake counter of this instance
RecordUnsuccessfulPoll()
// Return whether a choice has been finalized
Finalized() bool
}
NnarySnowflake is a snowflake instance deciding between an unbounded number of values. After performing a network sample of k nodes, if you have alpha votes for one of the choices, you should vote for that choice. Otherwise, you should reset.
type Parameters ¶
type Parameters struct {
Namespace string `json:"-"`
Metrics prometheus.Registerer `json:"-"`
K int `json:"k"`
Alpha int `json:"alpha"`
BetaVirtuous int `json:"betaVirtuous"`
BetaRogue int `json:"betaRogue"`
ConcurrentRepolls int `json:"concurrentRepolls"`
OptimalProcessing int `json:"optimalProcessing"`
// Reports unhealthy if more than this number of items are outstanding.
MaxOutstandingItems int `json:"maxOutstandingItems"`
// Reports unhealthy if there is an item processing for longer than this
// duration.
MaxItemProcessingTime time.Duration `json:"maxItemProcessingTime"`
}
Parameters required for snowball consensus
func (Parameters) Verify ¶
func (p Parameters) Verify() error
Verify returns nil if the parameters describe a valid initialization.
type Tree ¶
type Tree struct {
// contains filtered or unexported fields
}
Tree implements the snowball interface by using a modified patricia tree.
func (*Tree) Initialize ¶
func (t *Tree) Initialize(params Parameters, choice ids.ID)
Initialize implements the Consensus interface
func (*Tree) Parameters ¶
func (t *Tree) Parameters() Parameters
Parameters implements the Consensus interface
func (*Tree) RecordPoll ¶
RecordPoll implements the Consensus interface
func (*Tree) RecordUnsuccessfulPoll ¶
func (t *Tree) RecordUnsuccessfulPoll()
RecordUnsuccessfulPoll implements the Consensus interface
type TreeFactory ¶
type TreeFactory struct{}
TreeFactory implements Factory by returning a tree struct
type UnarySnowball ¶
type UnarySnowball interface {
fmt.Stringer
// Takes in the beta value
Initialize(beta int)
// RecordSuccessfulPoll records a successful poll towards finalizing
RecordSuccessfulPoll()
// RecordUnsuccessfulPoll resets the snowflake counter of this instance
RecordUnsuccessfulPoll()
// Return whether a choice has been finalized
Finalized() bool
// Returns a new binary snowball instance with the agreement parameters
// transferred. Takes in the new beta value and the original choice
Extend(beta, originalPreference int) BinarySnowball
// Returns a new unary snowball instance with the same state
Clone() UnarySnowball
}
UnarySnowball is a snowball instance deciding on one value. After performing a network sample of k nodes, if you have alpha votes for the choice, you should vote. Otherwise, you should reset.
type UnarySnowflake ¶
type UnarySnowflake interface {
fmt.Stringer
// Takes in the beta value
Initialize(beta int)
// RecordSuccessfulPoll records a successful poll towards finalizing
RecordSuccessfulPoll()
// RecordUnsuccessfulPoll resets the snowflake counter of this instance
RecordUnsuccessfulPoll()
// Return whether a choice has been finalized
Finalized() bool
// Returns a new binary snowball instance with the agreement parameters
// transferred. Takes in the new beta value and the original choice
Extend(beta, originalPreference int) BinarySnowflake
// Returns a new unary snowflake instance with the same state
Clone() UnarySnowflake
}
UnarySnowflake is a snowflake instance deciding on one value. After performing a network sample of k nodes, if you have alpha votes for the choice, you should vote. Otherwise, you should reset.
Source Files