Linearizability and sequential consistency, Software Engineering

Assignment Help:

QUESTION - Fault Tolerance

(a) Three computers together provide a replicated service. The manufacturers claim that each computer has a mean time between failure of five days; a failure typically takes four hours to fix. What is the availability of the replicated service?

(b) In the gossip architecture, why does a replica manager need to keep both a ‘replica' timestamp and a ‘value' timestamp?

(c) Explain the difference between linearizability and sequential consistency, and why the latter is more practical to implement, in general.

(d) Explain why allowing backups to process read operations leads to sequentially consistent rather than linearizable executions in a passive replication system.


Related Discussions:- Linearizability and sequential consistency

What are the tools mainly used for information gathering, What are the tool...

What are the tools are mainly used for information gathering 1.  Record review: A review of recorded documents of organisation is performed.Manuals procedures, forms and book

What is bottom-up testing, Bottom-up testing is a method of integration tes...

Bottom-up testing is a method of integration testing. A test engineer makes and uses test drivers for components that have not yet been developed, because, with bottom-up testing,

Cds - isis software, CDS/ISIS Software (Micro Version): Micro CDS/ISIS...

CDS/ISIS Software (Micro Version): Micro CDS/ISIS is an advanced non-numerical information storage and retrieval software package. It was developed by UNESCO in 1985 to meet t

What is cocomo, Software project Management & Quality Assurance 1. Brie...

Software project Management & Quality Assurance 1. Briefly explain various activities involved in project management. 2. What is COCOMO? Write necessary steps for cost estim

What is the use of user interface prototyping, What is the use of User Inte...

What is the use of User Interface prototyping? This prototyping is used to pre-specify the look and feel of user interface in an effective way.

What is risk assessment, What is Risk Assessment? Ans) A associated impa...

What is Risk Assessment? Ans) A associated impact and its comprehensive evaluation of the risk

Explain the process specification, Define Process Specification . Proces...

Define Process Specification . Process Specification is used to clarify all flow model processes that appear at the final level of refinement. Check & Convert pressure

Determine the characteristics of software, What are the characteristics of ...

What are the characteristics of Software? Software is engineered or modified; it is not manufactured in the traditional sense. Software is free of wear out. Though the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd