{"rewrite":{"id":"r_7cc7ebd6c92d2f104f87f994","clusterId":"c_9d9f856030519ac3ca42d417","slug":"stanford-professor-emeritus-proposes-homa-protocol-to-replace-tcp-in-ai-data-centers","model":"deepseek-v4-1-flash","headline":"Stanford Professor Emeritus Proposes Homa Protocol To Replace TCP In AI Data Centers","summary":"John Ousterhout, a Stanford University professor emeritus, is advocating for Homa, a transport protocol he argues is better suited to AI-oriented data centers than TCP. Homa processes short messages preferentially to hold down latency, and it can run alongside existing TCP. Its research traces to a 2018 paper by Behnam Montazeri, Ousterhout and others, and it assumes RPC-style communication.","whyItMatters":"TCP's connection state, byte-stream ordering and slow congestion inference are exactly the costs that mount in clusters where large model transfers and short KV cache lookups share one network, so a message-oriented protocol that prioritizes short messages is a measure of where AI data center networking is heading.","webCardHtml":"\u003cp\u003eTCP manages state per connection and treats data as one continuous byte stream, which is what makes it reliable on the open internet and costly inside a data center. There, many nearby machines exchange large numbers of small requests, and the bookkeeping plus transmission-order guarantees eat a large share of communication time.\u003c/p\u003e\u003cp\u003eHoma takes the opposite approach. It communicates in messages rather than streams, assumes remote procedure calls, and delivers short messages ahead of long ones. Because it can be introduced alongside TCP, the argument is about which traffic gets which protocol, not about turning TCP off.\u003c/p\u003e","blueskyPost":"John Ousterhout's Homa keeps TCP running alongside it, so adoption does not require ripping out the existing stack. That is the political opening most replacement protocols never get.","twitterPost":"Homa runs alongside TCP, not instead of it. That coexistence is the path to adoption Ousterhout is betting on.","threadsPost":"John Ousterhout's Homa does not demand that data centers abandon TCP. It runs alongside the existing stack. That coexistence is the practical opening, because replacement proposals usually die at the migration cost.","newsletterBlurb":"John Ousterhout, a Stanford University professor emeritus, wants AI data centers off TCP. His proposed protocol, Homa, is message-oriented rather than stream-oriented, delivers short messages first, and can be introduced alongside existing TCP. Ousterhout argues that what matters is latency: even a 1-millisecond delay is time expensive GPUs spend waiting.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20261006-homa-protocol-replace-tcp/\",\"title\":\"Stanford professor emeritus proposes \\\"Homa,\\\" a communication protocol to replace TCP; in the AI era, even 1-millisecond delays leave GPUs waiting\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4635,"outputTokens":615,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1791270430,"createdAt":"2026-10-06T07:04:00.000Z","publishedAt":"2026-10-06T07:06:07.000Z","updatedAt":"2026-10-06T07:06:07.000Z"},"cluster":{"id":"c_9d9f856030519ac3ca42d417","canonicalTitle":"TCPに代わる通信プロトコル「Homa」をスタンフォード大学名誉教授が提唱、AI時代は1ミリ秒の遅延でもGPUが待たされる","representativeArticleId":"a_cf4f6531214b611a174f9e0a","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[\"John Ousterhout\"],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-05T23:05:00.000Z","lastSeenAt":"2026-10-05T23:05:00.000Z","updatedAt":"2026-10-06T07:06:06.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20261006-homa-protocol-replace-tcp/","title":"TCPに代わる通信プロトコル「Homa」をスタンフォード大学名誉教授が提唱、AI時代は1ミリ秒の遅延でもGPUが待たされる"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":["John Ousterhout"],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}