--- title: Load Balancer Algorithm Simulator | daily.dev description: An interactive simulator demonstrates how different load balancing algorithms distribute traffic across servers. It covers Round Robin, Least Connections, IP... canonical: https://daily.dev/posts/e3b5ncipx twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Load Balancer Algorithm Simulator | daily.dev og:description: An interactive simulator demonstrates how different load balancing algorithms distribute traffic across servers. It covers Round Robin, Least Connections, IP... og:url: https://daily.dev/posts/e3b5ncipx og:image: https://api.daily.dev/og/posts/E3b5NCiPx.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. # Load Balancer Algorithm Simulator **[DevOps Daily](https://daily.dev/sources/devopsdaily)** · [@bobbyiliev](https://daily.dev/bobbyiliev) · 155 upvotes · 13 comments ## Summary An interactive simulator demonstrates how different load balancing algorithms distribute traffic across servers. It covers Round Robin, Least Connections, IP Hash, and Least Response Time strategies, explaining when to use each approach. The tool illustrates server failure handling, Layer 4 vs Layer 7 differences, and includes real-world examples from NGINX, AWS ELB, Kubernetes, and Cloudflare. Best practices include using weighted algorithms for varying server capacities, implementing health checks, and choosing appropriate layers for specific routing needs. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@opti21** · 4 upvotes > Looks cool, but it'd be better if you could demonstrate what happens when one of the servers fail **@dhruvil0204** · 2 upvotes > Nice blog on load balancing, and a great UI explanation of each method showing how requests are sent to different servers. **@knight\_03** · 1 upvotes > What if a request has already passed the load balancer and server failed before processing request > wouldn't it will be counted as failed request ? **@srmdn** · 1 upvotes > Thanks for sharing **@stuartgreig** · 1 upvotes > This is an amazing little simulator, super clear and demonstrates to people exactly what's going on. Definitely going to share this with my team ## Similar posts on daily.dev - [What Is a Load Balancer?](https://daily.dev/posts/what-is-a-load-balancer--hpaid5n1e) · Isovalent · 3 upvotes · 0 comments - [Load Balancing and Scaling LLM Serving](https://daily.dev/posts/load-balancing-and-scaling-llm-serving-dclfpxlwi) · DigitalOcean · 2 upvotes · 0 comments --- Tags: [#aws](https://daily.dev/tags/aws), [#devops](https://daily.dev/tags/devops), [#kubernetes](https://daily.dev/tags/kubernetes), [#nginx](https://daily.dev/tags/nginx) [View this post on daily.dev](https://daily.dev/posts/e3b5ncipx) ```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/e3b5ncipx","headline":"Load Balancer Algorithm Simulator","text":"Shared: Load Balancer Algorithm Simulator","url":"https://daily.dev/posts/e3b5ncipx","datePublished":"2026-01-15T11:05:39.258Z","dateModified":"2026-02-20T08:26:05.453Z","author":{"@type":"Person","name":"Bobby Iliev","url":"https://daily.dev/bobbyiliev","image":"https://avatars3.githubusercontent.com/u/21223421?v=4","description":"DevOps, DevEx, cloud & open source\n","worksFor":{"@type":"Organization","name":"Materialize","logo":"https://res.cloudinary.com/daily-now/image/upload/s--4mL2CrlK--/f_auto/v1725263959/companies/materialize"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":84940}},"image":"https://media.daily.dev/image/upload/s--foaA6JGU--/f_auto/v1722860399/public/Placeholder%2004","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":155},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":13}],"sharedContent":{"@type":"WebPage","url":"https://api.daily.dev/r/WIwM7GOUE"},"comment":[{"@type":"Comment","text":"Looks cool, but it’d be better if you could demonstrate what happens when one of the servers fail","datePublished":"2026-01-29T17:43:47.455Z","url":"https://daily.dev/posts/E3b5NCiPx#c-wCBYZtrk7","author":{"@type":"Person","name":"Brandon(opti)","url":"https://daily.dev/opti21","image":"https://media.daily.dev/image/upload/s--0T6SuLdb--/f_auto/v1749327292/avatars/avatar_NoNqdwqMgITN41uvt9Dx7?_a=BAMClqUq0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":4}},{"@type":"Comment","text":"Nice blog on load balancing, and a great UI explanation of each method showing how requests are sent to different servers.","datePublished":"2026-01-26T02:32:49.875Z","url":"https://daily.dev/posts/E3b5NCiPx#c-Q3Fv1U3FK","author":{"@type":"Person","name":"Mistry Dhruvil","url":"https://daily.dev/dhruvil0204","image":"https://lh3.googleusercontent.com/a/ACg8ocKSkwHixTUOa6vQ0br_gxV3xhyhBcVZBdewUEloTabyHw5cXHAR=s96-c"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}},{"@type":"Comment","text":"What if a request has already passed the load balancer and server failed before processing request\nwouldn’t it will be counted as failed request ?","datePublished":"2026-02-20T06:52:37.606Z","url":"https://daily.dev/posts/E3b5NCiPx#c-iS0v6WYCD","author":{"@type":"Person","name":"Dhvani","url":"https://daily.dev/knight_03","image":"https://media.daily.dev/image/upload/s--h8XDcpiq--/f_auto/v1740025441/avatars/avatar_xWOJioMgO9tVQ6TcQUdqZ"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"Thanks for sharing","datePublished":"2026-01-31T08:13:58.838Z","url":"https://daily.dev/posts/E3b5NCiPx#c-X613LbCeI","author":{"@type":"Person","name":"srmdn","url":"https://daily.dev/srmdn","image":"https://media.daily.dev/image/upload/s--sgM5PGvW--/f_auto/v1750635589/avatars/avatar_tfllEwSHlmvILiLAujyGu?_a=BAMClqZW0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"This is an amazing little simulator, super clear and demonstrates to people exactly what’s going on. Definitely going to share this with my team","datePublished":"2026-03-09T22:35:58.760Z","url":"https://daily.dev/posts/E3b5NCiPx#c-SZMHZnwze","author":{"@type":"Person","name":"Stuart Greig","url":"https://daily.dev/stuartgreig","image":"https://media.daily.dev/image/upload/s--FoVqUWgr--/f_auto/v1772633885/avatars/avatar_V6TOuZS8XXplYvc5hNLgE?_a=BAMAMiiu0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}}],"isPartOf":{"@type":"WebPage","url":"https://daily.dev/squads/devopsdaily","name":"DevOps Daily"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"DevOps Daily","item":"https://daily.dev/squads/devopsdaily"},{"@type":"ListItem","position":3,"name":"Load Balancer Algorithm Simulator"}]} ```