http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=In-kernel_web_serverIn-kernel web server - Revision history2026-05-04T23:50:22ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=In-kernel_web_server&diff=3466424&oldid=previmported>Quizwammer: Clarifying acronym due to possibility of confusion2024-01-04T17:56:07Z<p>Clarifying acronym due to possibility of confusion</p>
<p><b>New page</b></p><div>An '''in-kernel web server''' is an unlimited [[HTTP server]] that runs in [[kernel space]] or equivalent. It is also known as "accelerator".<br />
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== Benefits ==<br />
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* [[Computer performance|Performance]]: the path taken by data from a source [[Peripheral|device]] (i.e. a [[Disk storage|disk]]) to a destination device (i.e. a [[Network interface controller|NIC]]). Proper asynchronous [[zero-copy]] interfaces would make this available from [[User space|user-space]].<br />
* [[Scalability]]: with respect to number of simultaneous [[Client (computing)|clients]]. [[Event (computing)|Event notification]] of comparable scalability seems unlikely in user-space{{ref|1|1}}.<br />
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== Drawbacks ==<br />
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*Security: Kernel processes run with unlimited privileges.<br />
*Portability. Every kernel needs a specific implementation route.<br />
*Reliability. Failure in the webserver may crash the OS.<br />
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== Implementations ==<br />
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*[[illumos]]/[[Solaris (operating system)|Solaris]]: [[NCAkmod]] aka Network Cache and Accelerator (NCA) kernel module<br />
*[[HP-UX]]: [[NSAhttp]] (NSA is an acronym for Network Server Accelerator)<br />
*[[Linux]]: [[TUX web server|TUX]]<br />
*[https://mesibo.com Mesibo] In-kernel real-time messaging server<br />
*[[Windows NT]]: [[http.sys]] (part of [[Internet Information Services|IIS]])<br />
*[[SPIN (operating system)|SPIN]]: [[SPINhttp|http]]<br />
*[[OpenVMS]]: [[WASD.trap]]<br />
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== See also ==<br />
* [[Comparison of web server software]]<br />
* [[Service-oriented architecture]]<br />
* [[Unikernel]]/[[Exokernel]] (eg. [[SPIN (operating system)|SPIN]]'s [[Loadable kernel module|loadable kernel modules]])<br />
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== References ==<br />
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*{{note|1|1}}[http://www.citi.umich.edu/techreports/reports/citi-tr-00-4.pdf CITI_TR_00-4]<br />
*[http://usenix.org/events/usenix01/full_papers/joubert/joubert.pdf High-Performance Memory-Based Web Servers: Kernel and User-Space Performance. Philippe Joubert, Robert B. King, Rich Neves, Mark Russinovich, John M. Tracey. IBM. T. J. Watson Research Center]<br />
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[[Category:Web server software]]</div>imported>Quizwammer