From: Chuck Reeves (creeves_at_windows.microsoft.com)
Date: Mon Jan 12 2004 - 15:15:34 PST
"HYDRA: The Kernel of a Multiprocessor Operating System" is a paper
describing a system which proposes to act as the "kernel" for a
collection of multiprocessor computer operating systems. The system was
designed by a number of researchers at Carnegie-Mellon University around
1974. The design overview describes a much more object oriented approach
than previous documents we have read. The text almost read like the
description of a programming language document. Specifically the details
surrounding resources as objects, and the use of local name spaces and
procedures (paralleling stack frames and methods) were noted.
The model for secure method invocation (using capabilities, templates,
holes and parameters) seemed somewhat consistent with the approach taken
by Dennis and Van Horn, but seemed more structured and flexible. While
not selected for performance reasons, the design briefly discusses the
idea of garbage collection. The extensibility of this system was
demonstrated to go far beyond anything we have read about to date in the
bibliography example, where the ability to introduce new types with
associated operations and privileges seemed quite compelling.
Chuck Reeves, creeves_at_microsoft.com
Microsoft | Windows | Directory Services
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