Distributed File Systems

1
Distributed File Systems

• Chaitanya Sambhara
• CSC 8320
• Advanced Operating Systems

2
Characteristics

• A DFS is a network file system.
• It supports sharing of files.
• A single file system can be distributed across
  several physical nodes.

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• Used for replication of data.
• Used for fault tolerance

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Hardware Characteristics of DFS

• RAID Technology.
• RAID stands for Redundant Array of Independent
  Disks.
• Different levels of RAID

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Uses of Distributed File Systems

• Data sharing among multiple users
• User mobility
• Location transparency
• Backups and centralized management

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Transaction Processing

• ACID Properties.
• Concurrency Control.
• Deadlocks.
• Locking Techniques

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2 Phase Commit Protocol

• Phase 1Request a lock.
• Phase 2 Release the lock.

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System Tuning

• Go to explain plain.
• Expense of a query.
• Analysis
• Indexing

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Indexing

•  Indexing Technique.
• Insertion and Extraction of Data.
•  

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Data Replication

• Multiple Instances
• What is an instance?
• More than one data systems.
•  

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Data Systems

• Development
• Testing
• Production

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References

• Implementing message passing communication with a
  shared memory communication mechanism (1999) 
• On the abstraction of message-passing
  communications using algorithmic skeletons A
  case study (2005)
• The State of the Art in Agent Communication
  Languages (2000)
• A survey of anycast in IPv6 networks Weber, S.  
  Liang Cheng Lehigh Univ., Bethlehem, PA, USA
  (2004)
• Transaction-Based Communication-Centric Debug The
  Netherlands Technical University Delft (2007)
• NDR Name Directory Service in Mobile Ad-Hoc
  Network Jae-Hoon Jeong, Jung-Soo Park, Hyoung-Jun
  Kim (2005)
• A Distributed Mutual Exclusion Algorithm for
  Mobile Ad-Hoc Networks Università di Roma "La
  Sapienza  (2004)
• Local Leader Election in Wireless Sensor Networks
  ww.cs.rpi.edu/szymansk/papers/wman.05.pdf
  (2005)
• www.wikipedia.com