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This document outlines lecture 7 on consistency and replication in distributed systems. It discusses reasons for replication, issues that arise, different models of consistency including data-centric, client-centric and eventual consistency. It also covers topics like replica management, placement and protocols. The goal is to explain challenges in maintaining consistency across replicas and different approaches to addressing this.
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This document outlines a lecture on naming in distributed systems. It discusses naming entities, addresses, identifiers, and different approaches to flat and structured naming like home-based, distributed hash tables, and hierarchical location services. Name spaces, resolution, and implementation are examined. The Domain Name System (DNS) and attribute-based naming using the X.500 directory service are also covered. The lecture concludes with a summary of the naming techniques and concepts presented.
chapter4.ppt
The document summarizes a lecture on communication in distributed systems. It discusses layered communication protocols, types of communication including remote procedure calls, message-oriented communication, stream-oriented communication, and multicast communication. The lecture covers topics like basic RPC operation, parameter passing in RPCs, transient and persistent messaging models, support for continuous media with streams, and quality of service guarantees for streams.
chapter2.ppt
This document outlines a lecture on distributed systems architecture. It discusses architectural styles including layered, object-based, event-based, and data-centered. It also covers system architectures such as centralized, decentralized, and hybrid. The goal is to introduce different approaches to structuring distributed systems and classify them based on architectural patterns.
Ch 1-Non-functional Requirements.ppt
This document discusses non-functional requirements (NFRs) including definitions, classifications, and examples. It describes how NFRs define overall system qualities and constraints. Common NFR classifications include product requirements, organizational requirements, and external requirements. Examples of specific NFRs are provided like availability, reliability, usability, and maintainability. Conflicts can occur between NFRs that must be addressed. The document provides an overview of approaches to defining, analyzing, and testing NFRs.
Ch 6 - Requirement Management.pptx
This document discusses requirement management and outlines several key activities:
1. It distinguishes between stable and volatile requirements and different types of volatile requirements.
2. It describes requirements management activities like change control, version control, and requirements tracing.
3. It emphasizes that requirement management is an ongoing process that involves identifying, storing, and tracking changes to requirements throughout the project life cycle.
Ch 5 - Requirement Validation.pptx
The document discusses requirement validation which involves checking requirements documentation for completeness, consistency, and to ensure it provides an adequate basis for system design. It describes various validation techniques including reviews, translating requirements to alternative forms like user manuals and diagrams, and developing prototypes or test cases. The goal is to identify any issues with the documented requirements and get stakeholder agreement that their needs are properly represented.
Ch 1-Introduction.ppt
The document discusses different types of requirements for software systems. It defines requirements as statements that describe what a system must do. There are two main types: functional requirements, which define the behaviors and functions of the system, and non-functional requirements, which define qualities like performance, reliability, and security. Requirements must be clear, unambiguous statements to avoid issues during system development. Domain requirements also exist that are specific to the application area of the system.
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Fundamentals of Programming and Language Processors
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chapter7.ppt
- 1. Lecture 7- Consistency and Replication Distributed Systems Lecture 7: Consistency and Replication
- 2. Outline • Introduction • Reasons for Replication • Issues in Replication • Data-Centric Consistency • Overview • Continuous Consistency • Ordering-Based Consistency • Client-Centric Consistency • Overview • Eventual Consistency • Client-Centric Consistency Models • Replica Management • Replica Server Placement • Content Replication and Placement • Content Distribution • Consistency Protocols • Primary-Based Protocols • Replicated-Write Protocols • Summary Lecture 7: Consistency and Replication 2
- 3. Lecture 7: Consistency and Replication 3 a proxy server is a server that acts as an intermediary for requests from clients and allows a user to access web content by appending the name of the proxy server to the URL of the requested content
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- 38. Summary • Introduction • Reasons for Replication • Issues in Replication • Data-Centric Consistency • Overview • Continuous Consistency • Ordering-Based Consistency • Client-Centric Consistency • Overview • Eventual Consistency • Client-Centric Consistency Models • Replica Management • Replica Server Placement • Content Replication and Placement • Content Distribution • Consistency Protocols • Primary-Based Protocols • Replicated-Write Protocols Lecture 7: Consistency and Replication 38