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

Determine the latest trend in software engineering, Determine the Latest tr...

Determine the Latest trend in software engineering Latest trend in software engineering includes the concepts of software reusability, reliability, scalabilityetc. More and mo

Illustrate the relationship between time and cost, Q. Illustrate the relati...

Q. Illustrate the relationship between Time and cost? In software projects, time cannot be freely exchanged against cost. Such a trade off is limited by the nature of the softw

What is heuristics testing, What is Heuristics Testing? Ans) Heuristics ...

What is Heuristics Testing? Ans) Heuristics Testing is the failure-directed testing.

What are the advantages and disadvantages of size measure, What are the adv...

What are the advantages and disadvantages of size measure? Advantages: Artefact of software development which is simply counted. Many existing methods use LOC as a key input. A

What is oo integration testing, This strategy includes testing the classes ...

This strategy includes testing the classes as they are integrated into the system. The traditional approach would test every operation separately as they are executed into a class.

Prepare er diagram for the system, a) An ER diagram for the system. Show ...

a) An ER diagram for the system. Show all entities, relationships, cardinalities and optionalities. Also, include all intersection entities. You must use the Finkelstein  method

What is black box testing, Write short note on black box testing. The b...

Write short note on black box testing. The black box testing is also known as behavioural testing. This process fully focuses on the functional requirements of the software. Te

State about the normal data - Test data, State about the Normal data- Test...

State about the Normal data- Test data -  This is data which is valid/acceptable and has expected outcomes (for instance, if a date is being input the day must be in the rang

What are the advantages of software maintenance, What are the advantages of...

What are the advantages of Software maintenance Software maintenance is a very broad activity which includes error correction, deletion of obsolete capabilities, enhancement of

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