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- Newsgroups: comp.os.mach
- Path: sparky!uunet!think.com!paperboy.osf.org!osf.org!sp
- From: sp@osf.org (Simon Patience)
- Subject: Re: Mach and OSF/1
- Message-ID: <1992Nov23.095723.25783@osf.org>
- Keywords: Mach OSF/1 operating systems
- Sender: news@osf.org (USENET News System)
- Organization: Open Software Foundation
- References: <dbehr.63.722066744@dos-lan.cs.up.ac.za> <1992Nov18.131151.2051@cs.tcd.ie> <1992Nov20.182135.12294@awdprime.austin.ibm.com>
- Date: Mon, 23 Nov 1992 09:57:23 GMT
- Lines: 61
-
- In article <1992Nov20.182135.12294@awdprime.austin.ibm.com>, pbahrs@netftp.austin.ibm.com (Peter C Bahrs (boca)) writes:
- > In article <1992Nov18.131151.2051@cs.tcd.ie> dherity@cs.tcd.ie (Herity D.) writes:
- > >dbehr@dos-lan.cs.up.ac.za (Danie Behr) writes:
- > >
- > >>Can anyone help me with the differences/similarities between OSF/1 and Mach
- > >>please.
- > >
- > >Me too. OSF/1 is a branch off from Mach. AT this stage, I'm quite bewildered
- > >by the different MK numbers from two different sources. Can anyone point me
- > >at the pedigrees of the various versions of ASF/1 and Mach ?
- > >--
- > OSF/1 is an operating system that is implemented on top of Mach, either
- > with an intergrated kernel (procedure calls) or micro kernel (message
- > passing). The kernel used is Mach (2.5 is proc, 3.0 is ipc).
- > In particular the OSF organization created the OSF/1 operating system; a
- > very robust operating system with unix type interface. I think
- > the current OSF/1 os (which comes with their mach enhancements) is 4.0.
-
- Close.
-
- There are three main versions of OSF/1 available and with differing
- purposes.
-
- OSF/1 IK (Not the official name but makes it easier to talk about it) is
- the Integrated Kernel version. It was originally based on Mach 2.5 (X115
- or thereabouts), what was to be BSD 4.4 and a large engineering effort by
- OSF. The first version, 1.0, was shipped in November 1990 and the current
- release is 1.1.1 (with 1.1.2 due soon). The architecture is still much
- like that of Mach 2.5 in that the Unix and Mach parts reside in the same
- address space and access each other via direct procedure calls. This
- version comes from OSF Engineering and is intended to be the basis for
- people who want to build products.
-
- The OSF Research Institute has two other versions that are available to
- OSF members with an OSF/1 source license.
-
- OSF/1 MK is a single server version of OSF/1. The kernel is Mach 3 and the
- server architecture is much like that of the CMU BSD server in that it
- uses an emulator. This system is primarily a research vehicle at the
- moment but we are making architectural changes (like removing the
- emulator) which will make it more suitable for general use. The current
- release is V4.1 which is based on OSF/1 IK 1.0.4. V5.0 (based on OSF/1
- 1.1.X) will probably out sometime during Q2 next year.
-
- OSF/1 AD is the version developed for Multicomputors. This is again based
- on Mach 3 and started from OSF/1 MK, although obviously significant
- changes have been made. Intel have used OSF/1 AD as a basis for their
- OS on the new Paragon machines. This version is also being used as a
- starting point for the OSF RI work in clustered systems, ie a single
- system image across a number of machines on a fast network.
-
- I hope this makes things clearer.
-
- Simon.
-
- --
- Simon Patience
- Open Software Foundation Phone: +33-76-63-48-72
- Research Institute FAX: +33-76-51-05-32
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-