envoyproxy/envoy

CacheFilter: Handle slow cache insertion

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#10,022 opened on Feb 12, 2020

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area/cachehelp wanted

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Description

CacheFilter currently assumes that caches can accept inserts much faster than clients can accept responses. This should be true for reasonable deployments, but CacheFilter should handle caches that are too slow to accept inserts. If a cache is slow enough, insertion should be abandoned.

Contributor guide

Research direction
Investigate the CacheFilter code to understand how cache insertion is performed. Look for existing timeout mechanisms in Envoy's async operations. Propose a solution to abandon insertion if it takes too long.
Tech stack
cpp
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++Git
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30