Horus: A Flexible Group Communications System
This paper reports on the Horus project, whichprovides an unusually flexible group communication model to application-developers. This flexibility extends to system interfaces, the properties provided by a protocol stack, and even the configuration of Horus itself, which can run in user space, in a...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1996
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.23.9752 http://www.softwired.ch/people/maffeis/articles/research/cacm96.pdf |
| Summary: | This paper reports on the Horus project, whichprovides an unusually flexible group communication model to application-developers. This flexibility extends to system interfaces, the properties provided by a protocol stack, and even the configuration of Horus itself, which can run in user space, in a operating system kernel or microkernel, or be split between them. Horus is used through an interfaceproxy.Proxies can support toolkits that use groups explicitly, or hide groups beneath parallel programming back-ends (for example, the Panda subsystem of the Orca language [2], and IBM's PCODE subsystem for MPI). Finally,wehave developed a proxy that intercepts certain classes of system calls and maps them into Horus operations, for example to provide security or fault-tolerance features transparently [3]. This proxy has also been used to embed Horus into Tcl/TK and Python, both popular prototyping languages |
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