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

Difference between pilot and beta testing, Difference between Pilot and Bet...

Difference between Pilot and Beta Testing. Pilot testing includes having a group of end users try the system prior to its full deployment in order to give feedback on its perfo

What are the problems in comes in SRS, What are the Problems in comes in SR...

What are the Problems in comes in SRS There are numerous features which make requirements analysis difficult. These are explained below: 1. Complete requirements are diffic

Advantage of microcomputer software packages, Advantage of microcomputer so...

Advantage of microcomputer software packages: i)  compilation and maintenance of reference and fact files;  ii)  compilation of current and retrospective bibliographies

Determine the levels of capability maturity model, Determine the levels of ...

Determine the levels of Capability Maturity Model(CMM). Capability Maturity Model(CMM) Level 1:Initial - Few processes are explained  and individual efforts are taken. Le

What is code review, A meeting at which software code is presented to proje...

A meeting at which software code is presented to project personnel, users,  managers,  customers, or other interested parties for approval or comment. Contrast with code audit, cod

Discuss in detail about delphi method, Discuss in detail about Delphi Metho...

Discuss in detail about Delphi Method. Procedure The co-ordinator represents a specification and assessment form to each expert. Co-ordinator calls a group discussion

Why winrunner may fail to identify an object on a gui, Why WinRunner may fa...

Why WinRunner may fail to identify an object on a GUI? WinRunner may fail to recognize an object in a GUI in below cases: - If it isn't a standard windows object - If the

Define about the software development life cycle, Define about the Software...

Define about the Software Development Life Cycle The different steps (known as phases) that are adopted in development of this process are collectively called as Software Devel

Explain in detail about structural modeling, Explain in detail about Struct...

Explain in detail about Structural Modeling. Structural model having a detail refinement of ERD, data flow model and control flow model. Creating an ERD. Example: Saf

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