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Amoeba Operating System

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Publicada em: Educação, Tecnologia
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Amoeba Operating System

  1. 1. COMPUTER ORGANIZATION
  2. 2. COMPUTER <ul><li>COMPUTING MACHINE </li></ul><ul><li>USER </li></ul><ul><li>HARDWARE </li></ul><ul><li>SOFTWARE </li></ul>SOFTWARE APPLICATION SOFTWARE SYSTEM SOFTWARE OPERATING SYSTEM
  3. 3. OPERATING SYSTEM <ul><li>USER-HARDWARE INTERACTION </li></ul><ul><li>NEEDED TO MAKE USE CONVENIENT AND EFFICIENT </li></ul><ul><li>PREVENTS USER PROGRAMS FROM INTERFERING WITH THE PROPER OPERATION OF THE SYSTEM </li></ul>WHAT IF NO O/S ?
  4. 4. O/S IN SIMPLE WORDS I/O OPERATIONS FILE SYSTEM ERROR DETECTION RESOURCE ALLOCATION PROGRAM EXECUTION O/S
  5. 5. COMING TO TECHNICAL VIEW POINT <ul><li>Processor management. </li></ul><ul><li>Memory management. </li></ul><ul><li>Device management. </li></ul><ul><li>Application Interface </li></ul><ul><li>User Interface. </li></ul>
  6. 6. KERNEL <ul><li>Layered structure of </li></ul><ul><li>an O/S </li></ul><ul><li>A SIMPLE DIAGRAM WILL MAKE IT MORE CLEAR </li></ul><ul><li>What does it do? </li></ul>
  7. 7. OPERATING SYSTEM A M O E B A
  8. 8. SHORT INTRO. <ul><li>Amoeba is the fastest growing multi-kernel distributed operating system </li></ul><ul><li>Developed by Andrew Tanenbaum </li></ul><ul><li>First prototype was released in 1983 </li></ul><ul><li>The last official update by original developers was in 1996 </li></ul><ul><li>Others have developed their own versions </li></ul><ul><ul><li>Fireball Amoeba by Fireball Software Distribution </li></ul></ul>
  9. 9. GOALS OF AMOEBA <ul><ul><li>Distribution </li></ul></ul><ul><ul><ul><li>Connecting together many machines. </li></ul></ul></ul><ul><ul><li>Parallelism </li></ul></ul><ul><ul><ul><li>Allowing individual jobs to use multiple CPUs easily. </li></ul></ul></ul><ul><ul><li>Transparency </li></ul></ul><ul><ul><ul><li>Having the collection of computer act like a single </li></ul></ul></ul><ul><ul><ul><li>system. </li></ul></ul></ul><ul><ul><li>Performance </li></ul></ul><ul><ul><ul><li>Achieving all of the above in an efficient manner. </li></ul></ul></ul>
  10. 10. KEY CONCEPTS <ul><li>Micro-kernel </li></ul><ul><ul><li>A simple micro-kernel is the basis for Amoeba </li></ul></ul><ul><ul><li>Each machine in AMOEBA system runs a small identical software programe called a micro-kernel </li></ul></ul><ul><ul><li>Communication b/w client processes & server process </li></ul></ul><ul><ul><li>It handles the memory management, I/O, communication, object primitive, and basic processes </li></ul></ul>
  11. 11. KEY CONCEPTS <ul><li>Remote Procedure Calls (RPC) </li></ul><ul><ul><li>Used for communication between client and server </li></ul></ul><ul><li>FLIP </li></ul><ul><ul><li>Fast Local Internet Protocol </li></ul></ul><ul><ul><li>Developed by Andrew Tanenbaum. </li></ul></ul><ul><ul><li>Designed to optimize the speed of RPCs </li></ul></ul>
  12. 12. KEY CONCEPTS <ul><li>Security </li></ul><ul><ul><li>128 bit value known as CAPABILITY. </li></ul></ul><ul><ul><li>Used to verify that the user has permission to access the object. </li></ul></ul><ul><ul><li>Capabilities are encrypted </li></ul></ul><ul><li>Directory Server </li></ul><ul><ul><li>Handles naming of files </li></ul></ul><ul><ul><li>Knows the physical location of each file </li></ul></ul><ul><ul><li>Most files can be sent in a single RPC </li></ul></ul>
  13. 13. ARCHITECTURE <ul><li>4 main partS to Amoeba’s Architecture </li></ul><ul><ul><li>Workstations </li></ul></ul><ul><ul><li>Processor Pool </li></ul></ul><ul><ul><li>Servers </li></ul></ul><ul><ul><li>WAN Gateway </li></ul></ul>
  14. 15. BECOMING FAMILIAR WITH AMOEBA
  15. 17. LOG IN WINDOW
  16. 18. DESKTOP
  17. 20. SOME OTHER APPS.
  18. 21. ADVANTAGES OF AMOEBA <ul><li>Can use older/slower CPUs to create powerful system, need not to be of the same architecture (can mix SPARC, Motorola PowerPC, Intel, Pentium, etc.) so your old systems won’t be useless now ! </li></ul><ul><li>Micro-Kernel allows for other file systems to be created </li></ul><ul><li>Initially Unix emulation was added by developers to make it compatible with commonly used systems of that time so they have many common commands </li></ul>
  19. 22. ADVANTAGES OF AMOEBA <ul><li>Developed from scratch so has the potential to add compatibility with devices . </li></ul><ul><li>System can be modified easily by a programmer according to requirements. </li></ul><ul><li>It efficiently makes the connected system work with maximum potential </li></ul><ul><li>Process is never swapped out. </li></ul>
  20. 23. Disadvantages <ul><li>Can only hold programs as large as its physical memory </li></ul><ul><li>It has not had an official update in over 10 years </li></ul><ul><li>Designed to run on machines with large amounts of RAM and huge local disks </li></ul><ul><li>Process occupies contiguous segments in memory which may give rise to fragmentation </li></ul>
  21. 24. THANKYOU

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