How do TTL and TTI (idle timeout) differ in caches?

Problem Statement

Explanation

TTL bounds staleness regardless of activity. TTI (also called sliding expiration) keeps hot items alive by renewing their expiry on each hit. Combining them allows a hard freshness cap while keeping active keys resident.

Code Solution

SolutionRead Only

set(key,value, ttl=10m, tti=2m)

Practice Sets

This question appears in the following practice sets:

Caching & CDN Architecture

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How do TTL and TTI (idle timeout) differ in caches?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

How do TTL and TTI (idle timeout) differ in caches?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which statement best describes the Single Responsibility Principle?

Open–Closed Principle encourages what practice when adding features?

High-Level Design (HLD) typically focuses on which artifacts?

Which UML diagram best captures interactions over time between components?

Which pairing describes a healthy design goal?

More from System Design

Master Interviews
Anywhere, Anytime