DS notes #1

Dated- 11-1-2017

What is distributed systems?

• Computer - connected - high speed communication links - builds single system
• Multiple resources - work together

Requirements

• Security and reliability
• Consistency of replicated data
• Concurrent access

Fault tolerance

Architecture of distributed systems

1) shared memory architecture

2) distributed memory architecture

Shared memory architecture

• Interconnection network- switch or single bus
• System- single address space
• Suitable parallel processing
• Part of DS

* Distributed memory architecture