4 Traffic Failure Handling Patterns | System Design | Timeout Retry Jitter Backoff |
Hi, in this video we will discuss Traffic Failure Handling Patterns in Microservices and Distributed Systems. It is one of the most important and critical technical topics in system design commonly used in service calls to improve the robustness and reliability of communication between services.
Timeout: Timeouts define the maximum duration a service call should wait for a response before considering it as failed. By setting a timeout, you ensure that the caller does not wait indefinitely for a response, especially in situations where the service may be unresponsive or experiencing delays. When a timeout occurs, the caller can handle the failure gracefully, log an error, or take appropriate action, such as retrying the request or returning an error response to the client.
Retry: Retrying a service call involves making multiple attempts to send the request and receive a successful response. Retries are useful when transient failures occur, such as network glitches, temporary service unavailability, or overloaded servers. By retrying the request, you provide an opportunity for the failure to be resolved or circumvented. Retries can be performed immediately after a failure or with a delay, depending on the specific scenario.
Backoff: Backoff is a technique used in conjunction with retries to introduce a delay between consecutive retry attempts. The purpose of backoff is to prevent overwhelming the service or exacerbating the underlying issue causing the failure. Instead of immediately retrying, the caller waits for a progressively longer period before making the next attempt. This delay can be implemented using various strategies, such as exponential backoff, where the waiting time increases exponentially with each retry. Backoff helps reduce contention and congestion, allowing the service to recover or stabilize before processing subsequent requests.
TABLE OF CONTENTS
• 00:00 Introduction
• 00:37 Service to Service calls
• 01:29 Timeout
• 05:20 Retry
• 07:24 Backoff Strategy (Fixed Wait , Exponential Backoff)
• 12:31 Jitter
• 14:42 A blueprint and rule of thumb
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