Progress of HTTP/2 implementation for ATS and future work

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November 07, 14

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This slide was used on HTTP/2 session of Fall 2014 ATS Summit (https://cwiki.apache.org/confluence/display/TS/Fall+2014+Summit).

2014 年秋の ATS (Apache Traffic Server) Summit の HTTP/2 セッションで用いた発表資料です。

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Progress of HTTP/2 impl and future work Yahoo Japan Corporation Ryo Okubo

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Agenda • The story of HTTP/2 impl and progress • Future work • How to backpost to an origin server • Discussion

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The story of HTTP/2 impl • TS-2729 • Initial patch used nghttp2 (obsoleted) • Current patch doesn’t depends on this (WIP)

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Progress • Opening/closing HTTP/2 sessions – Already merged • Handling HTTP/2 requests and responses – Implemented as prototype

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Y! Japan web page with HTTP/2 // Above screenshot was taken in experimental environment

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How to use current patches • Get and apply a patch attached on TS-2729 – h2_prototype.patch • Build ATS as usual • Enable https • Access the ATS with HTTP/2 client – nghttp, Chrome Canary, Firefox Nightly

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Demo

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Future work • Rethinking how to handle backposting • Debugging, refactoring and testing • Implementing rest of essential features

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How to backpost with HTTP/1.1? • Use FetchSM? • Use HttpSM directly? • I’d like to use FetchSM at first – Redesign and migrate to HttpSM in future

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FetchSM • SPDY code uses it • Simple and easy solution • But, it has a little overhead – e.g. memcpy()

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HttpSM • It can reduce overhead • But, HttpSM needs some modification – Redesign? – Or add interfaces for backposting?

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Discussion points • How to backpost – FetchSM, HttpSM, etc • Release schedule • Another topics

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End of Slides • Please give me advices if any – IRC nickname: rokubo (rokubo_)