FHttpRetrySystem::FExponentialBackoffCurve Struct Reference

#include <HttpRetrySystem.h>

Public Member Functions
HTTP_API bool	IsValid () const
HTTP_API float	Compute (uint32 RetryNumber) const

Public Attributes
float	Base = 2.0f
float	ExponentBias = 1.0f
float	MinCoefficient = 0.5f
float	MaxCoefficient = 1.0f
float	MaxBackoffSeconds = 60.0f

Detailed Description

Model for computing exponential backoff using the formula: Base**(CurrentRetryAttempt + Bias) Then applying jitter to the backoff. Jitter application is performed by selecting a random value in the [Min, Max] range and multiplying it against the computed backoff. Half jitter can be implemented using { 0.5, 1.0 }, which becomes Backoff' = Backoff * Rand(0.5, 1.0) = Backoff/2 + Rand(0, Backoff/2) Full jitter can be implemented using { 0.0, 1.0 }, which becomes Backoff' = Backoff * Rand(0.0, 1.0) = Rand(0.0, Backoff) No jitter can be implemented using { 0.0, 0.0 } or any pair that where Min > Max. Backoff' = Backoff

Member Function Documentation

Compute()

float FHttpRetrySystem::FExponentialBackoffCurve::Compute

(

uint32

RetryNumber

)

const

IsValid()

bool FHttpRetrySystem::FExponentialBackoffCurve::IsValid

(

)

const

Member Data Documentation

Base

float FHttpRetrySystem::FExponentialBackoffCurve::Base = 2.0f

Exponential backoff base

ExponentBias

float FHttpRetrySystem::FExponentialBackoffCurve::ExponentBias = 1.0f

Exponential backoff bias added to the current retry number

MaxBackoffSeconds

float FHttpRetrySystem::FExponentialBackoffCurve::MaxBackoffSeconds = 60.0f

Max back off seconds

MaxCoefficient

float FHttpRetrySystem::FExponentialBackoffCurve::MaxCoefficient = 1.0f

Exponential backoff jitter coefficient maximum value. Defaults to half jitter

MinCoefficient

float FHttpRetrySystem::FExponentialBackoffCurve::MinCoefficient = 0.5f

Exponential backoff jitter coefficient minimum value. Defaults to half jitter

---

The documentation for this struct was generated from the following files:

• Engine/Source/Runtime/Online/HTTP/Public/HttpRetrySystem.h
• Engine/Source/Runtime/Online/HTTP/Private/HttpRetrySystem.cpp