In-kernel web server
An in-kernel web server is an unlimited HTTP server that runs in kernel space or equivalent. It is also known as "accelerator".
Benefits
- Performance: the path taken by data from a source device (i.e. a disk) to a destination device (i.e. a NIC). Proper asynchronous zero-copy interfaces would make this available from user-space.
- Scalability: with respect to number of simultaneous clients. Event notification of comparable scalability seems unlikely in user-space1.
Drawbacks
- Security: Kernel processes run with unlimited privileges.
- Portability. Every kernel needs a specific implementation route.
- Reliability. Failure in the webserver may crash the OS.
Implementations
- illumos/Solaris: NCAkmod aka Network Cache and Accelerator (NCA) kernel module
- HP-UX: NSAhttp (NSA is an acronym for Network Server Accelerator)
- Linux: TUX
- Mesibo In-kernel real-time messaging server
- Windows NT: http.sys (part of IIS)
- SPIN: http
- OpenVMS: WASD.trap
See also
- Comparison of web server software
- Service-oriented architecture
- Unikernel/Exokernel (eg. SPIN's loadable kernel modules)
References
- ^1CITI_TR_00-4
- 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
 | This network-related software article is a stub. You can help Wikipedia by adding missing information. |
Content Disclaimer
Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.
- The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
- There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
- It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
- Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
- Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.