--- title: System Design Interview — Replication (Part 1: Fundamentals) description: An introduction to data replication in distributed systems, covering why replication is needed (latency, fault tolerance, read scalability) and the three main... canonical: https://daily.dev/posts/44tvzmae8 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: System Design Interview — Replication (Part 1: Fundamentals) | daily.dev og:description: An introduction to data replication in distributed systems, covering why replication is needed (latency, fault tolerance, read scalability) and the three main... og:url: https://daily.dev/posts/44tvzmae8 og:image: https://api.daily.dev/og/posts/44tVZmaE8.png og:image:alt: Post cover image og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # System Design Interview — Replication (Part 1: Fundamentals) **[Rahul Jindal](https://daily.dev/sources/jd6jwigzg4jjz9gnjltbs)** · [@rahuljindal234](https://daily.dev/rahuljindal234) · 0 upvotes · 0 comments ## Summary An introduction to data replication in distributed systems, covering why replication is needed (latency, fault tolerance, read scalability) and the three main approaches: single-leader, multi-leader, and leaderless. The post focuses on leader-follower architecture, explaining the write and read paths, then compares synchronous, asynchronous, and semi-synchronous replication with their respective trade-offs between durability, availability, and performance. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Data Replication: Leader-Follower, Multi-Leader, Leaderless, and the Replication Lag Problem](https://daily.dev/posts/data-replication-leader-follower-multi-leader-leaderless-and-the-replication-lag-problem-wjny51xp7) · Medium · 7 upvotes · 0 comments - [Scaling the data storage layer in system design](https://daily.dev/posts/scaling-the-data-storage-layer-in-system-design-80lqs6gec) · The Polymathic Engineer · 16 upvotes · 0 comments - [Distributed Databases: An Overview](https://daily.dev/posts/distributed-databases-an-overview-pt2nq8a4o) · Couchbase · 0 upvotes · 0 comments --- Tags: [#career](https://daily.dev/tags/career), [#database](https://daily.dev/tags/database), [#data-engineering](https://daily.dev/tags/data-engineering), [#distributed-systems](https://daily.dev/tags/distributed-systems) [View this post on daily.dev](https://daily.dev/posts/44tvzmae8) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/44tvzmae8","headline":"System Design Interview — Replication (Part 1: Fundamentals)","text":"Shared: System Design Interview — Replication (Part 1: Fundamentals)","url":"https://daily.dev/posts/44tvzmae8","datePublished":"2026-03-01T14:04:36.351Z","dateModified":"2026-10-14T02:27:00.057Z","author":{"@type":"Person","name":"Rahul Jindal","url":"https://daily.dev/rahuljindal234","image":"https://lh3.googleusercontent.com/a/ALm5wu2RIeDG7fdKqCU0lc9TbITpbOsTdoZCi-mww8eu=s96-c","interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":460}},"image":"https://media.daily.dev/image/upload/s--P4t4XyoV--/f_auto/v1722860399/public/Placeholder%2001","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"sharedContent":{"@type":"WebPage","url":"https://api.daily.dev/r/su3BOEVHz"},"isPartOf":{"@type":"WebPage","url":"https://daily.dev/sources/jd6jwigzg4jjz9gnjltbs","name":"Rahul Jindal"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Rahul Jindal","item":"https://daily.dev/sources/jd6jwigzg4jjz9gnjltbs"},{"@type":"ListItem","position":3,"name":"System Design Interview — Replication (Part 1: Fundamentals)"}]} ```