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- Path: sparky!uunet!wupost!kuhub.cc.ukans.edu!hawk!spratt
- Newsgroups: comp.databases.theory
- Subject: Re: Transactions In OSs
- Message-ID: <1992Sep9.195459.16665@hawk.cs.ukans.edu>
- From: spratt@hawk.cs.ukans.edu (Lindsey Spratt)
- Date: Wed, 9 Sep 1992 19:54:59 GMT
- References: <1992Sep8.232718.15295@fawlty.towers.oz.au> <MILLER.92Sep9142822@alabaster.cs.rochester.edu>
- Organization: University of Kansas Computer Science Dept
- Lines: 13
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- The Multics OS was extended in the early 80s with a "Data Management
- System". This extension involved creating a new file type (DM files),
- and associated software to provide transactions/locking/journalling
- with any operations done on these DM files. The Multics Relational
- Data Store (MRDS) was rebuilt to use the new DM Services (rather than
- using the unprotected regular files).
-
- Some modifications were necessary to the hardcore of Multics to
- support these DM files - primarily changes to the page control to
- integrate the paging and segmentation of DM files with the paging and
- segmentation of non-DM (regular) files.
-
-