DistOS 2015W Session 3

Reading Response Discussion

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Multics

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Team: Sameer, Shivjot, Ambalica, Veena

It came into being in the 1960s and it completely vanished in 2000s. It was started by Bell, General Electric and MIT but Bell backed out of the project in 1969. Multics is a time sharing OS which provides Multitasking and Multiprogramming.

It provides following features: 1. Utility Computing 2. Access Control Lists 3. Single level storage 4. Dynamic linking

 *Sharded libraries or files can be loaded and linked to Random Access Memory at run time. 

5. Hot swapping 6. Multiprocessing System 7. Ring oriented Security

  * It provides number of levels of authorization within the computer System.

It is not a Distributed OS but it a Centralized system which was written in the assembly language.

Sprite

Panel Group: Jamie, Hassan, Khaled

Sprite had the following Design Features: 1. Network Transparency. 2. Process Migration. 3. Handling Cache Consistency

   a. Sequential file sharing===> By using a version number for each file.
   b. Concurrent write sharing==> Disable cache to clients.

4. The main design theme is to make aggressive use of RAM for caching files.