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

Structured analysis - software engineering, Structured Analysis Model ...

Structured Analysis Model Structured  analysis is  the  most  broadly  used  of  needs  modeling  techniques,  relies  on  flow modeling and data modeling to build the basis f

Advantages and disadvantages of size measure, What are the advantages and d...

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

Define software prototyping, Define software prototyping. Software prot...

Define software prototyping. Software prototyping is explained as a rapid software development for validating the requirements.

What is the benefit of modular design, What is the benefit of modular desig...

What is the benefit of modular design? Changes made during testing and maintenance becomes manageable and they do not influence other modules.

Describe the various elements of data design, Describe the various elements...

Describe the various elements of data design? i. Data object - The data objects are identified and relationships among various data objects are represented using ERD or data di

What is software life cycle, Software life cycle starts when a software pro...

Software life cycle starts when a software product is first conceived and ends when it is no longer in use. It contains aspects such as initial concept, requirements analysis, inte

What are the aims of analysis modelling, What are the aims of Analysis mode...

What are the aims of Analysis modelling? i. To make apparent what the customer wants. ii. To set up a basis for the creation of software design. iii. To devise a set of v

Test questions, Dear Sir/ Madam I have some remaining test questions need ...

Dear Sir/ Madam I have some remaining test questions need to be answered, from yesterday''s test bank can I get a solution please? Regards John

Intersection in java, public static void mergesort(int x[],int y[])

public static void mergesort(int x[],int y[])

How to compute the cyclomatic complexity, How to compute the cyclomatic com...

How to compute the cyclomatic complexity? The cyclomatic complexity can be calculated by any one of the following ways. 1. The numbers of regions of the flow graph correspon

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