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 advantages and disadvantages of big-bang, What are the advanta...

What are the advantages and disadvantages of big-bang? Advantages: This approach is easy. Disadvantages: It is difficult to debug.It is not easy to isolate errors whereas te

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

Waterfall model is more advantageous than adhoc methods, Explain why waterf...

Explain why waterfall model is more advantageous than adhoc methods.      Ad-hoc Process Models- "Process capability is unpredictable due to the software process is constantly

What is boundary value, Explain Boundary value? (1)A data value that cor...

Explain Boundary value? (1)A data value that corresponds to a input, internal, or output value specified for a system or component. (2) A value which lies at, or just inside

COCOMO model, What is the correct order in which a software project manager...

What is the correct order in which a software project manager estimates various project parameters while using COCOMO?

Explain about the software metrics, SOFTWARE METRICS Measurement is fun...

SOFTWARE METRICS Measurement is fundamental to an engineering discipline and software engineering is no exception. Software metric is a quantitative measure which is derived fr

Class diagram, Explain the compare of class diagram

Explain the compare of class diagram

Different server platforms for erp systems, Question: a. Assume that yo...

Question: a. Assume that you have three similar projects, and, in each, the ratios of problems found during system test versus first year in the field have been 1.5, 1.2, and

Development phases of the detailed cocomo model, Q. Explain the development...

Q. Explain the development phases of the detailed COCOMO model. Ans A software development is performed in four successive phases which are as follows 1 : plan/requirement

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