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

Define the optimising level of maturity model, Level 5 (Optimising) O...

Level 5 (Optimising) Organisation satisfies all the requirements of level-4. This is final level. Organisation at this maturity level is considered almost perfect. At this st

Different type of testing tools, Different type of testing tools. (a) T...

Different type of testing tools. (a) Test Case Generators: (b) Capture/ Playback and Test harness tools: (c)  Coverage Analysis Tools: (d) Test Comparators e) Memor

Software quality attributes, The Clue-Less system shall be available to all...

The Clue-Less system shall be available to all users on the Internet 95% of the time between 5:00pm and midnight local time and 90% of the time between midnight and 5:00pm local ti

What transform mapping refers, What transform mapping refers? The trans...

What transform mapping refers? The transform mapping is a bundle of design steps applied on the DFD in order to map the transformed flow characteristics into specific architect

What is quality, What is quality? Quality, simplistically, means that a...

What is quality? Quality, simplistically, means that a product should meet its requirement. This is problematical for software systems. There is a tension among custom

Explain the quality assurance, Quality Assurance Quality assurance is a...

Quality Assurance Quality assurance is an activity that establishes and evaluates the processes that produce products. Quality assurance would calculate processes to identify w

Aggregation between objects, Aggregation between objects Aggregation am...

Aggregation between objects Aggregation among objects shows a relationship. It is a whole/part relationship. Aggregation might be implying containment.

Which is not the purpose of full annealing, Which is not the purpose of ful...

Which is not the purpose of full annealing Produces hardest material.

Applied physics, an isolated metal sphere has a radius r. when charged to a...

an isolated metal sphere has a radius r. when charged to a potential v, the charge on sphere is q. 1- state an expression, in terms of r and q, for potential v of sphere.

Advantage of software life cycle model, Q. Advantage of software life cycle...

Q. Advantage of software life cycle model? The advantage of this model is the wide range of options to accommodate the good features of outer life cycle models. It becomes equi

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