--- title: Milan Jovanović | daily.dev description: When scaling a SignalR application to multiple instances behind a load balancer, notifications can silently drop because each server only knows about its own... canonical: https://daily.dev/posts/milan-jovanovi--yw4phfmfs twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Milan Jovanović | daily.dev og:description: When scaling a SignalR application to multiple instances behind a load balancer, notifications can silently drop because each server only knows about its own... og:url: https://daily.dev/posts/milan-jovanovi--yw4phfmfs og:image: https://api.daily.dev/og/posts/YW4pHFMFs.png og:image:alt: Milan Jovanović 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. # Milan Jovanović **[Milan Jovanović](https://daily.dev/sources/milanjovanovic)** · 6 min read · 0 upvotes · 0 comments ## Summary When scaling a SignalR application to multiple instances behind a load balancer, notifications can silently drop because each server only knows about its own connections. The fix is a Redis backplane — a shared pub/sub layer that lets all server instances route messages to any connected client. Setup requires just one method call: chaining `.AddStackExchangeRedis()` onto `AddSignalR()`. Two important caveats: sticky sessions are still required for the WebSocket negotiation handshake, and messages are not buffered if Redis goes down temporarily. The post also compares the Redis backplane to Azure SignalR Service, recommending the former for self-hosted or latency-sensitive setups. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#.net](https://daily.dev/tags/.net), [#redis](https://daily.dev/tags/redis) [View this post on daily.dev](https://daily.dev/posts/milan-jovanovi--yw4phfmfs) ```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":"TechArticle","headline":"Milan Jovanović","url":"https://daily.dev/posts/milan-jovanovi--yw4phfmfs","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/milan-jovanovi--yw4phfmfs"},"datePublished":"2026-03-20T20:26:53.601Z","dateModified":"2026-03-20T20:27:19.824Z","description":"When scaling a SignalR application to multiple instances behind a load balancer, notifications can silently drop because each server only knows about its own...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/eaacf1d3640854163e63d00c414f9a5d?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/eaacf1d3640854163e63d00c414f9a5d?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Milan Jovanović","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Milan Jovanović","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/78d8abfb692746538410dee47f93e566","url":"https://daily.dev/sources/milanjovanovic"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/milan-jovanovi--yw4phfmfs","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":".net,redis","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Milan Jovanović","item":"https://daily.dev/sources/milanjovanovic"},{"@type":"ListItem","position":3,"name":"Milan Jovanović"}]} ```