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

Event procedure and a general procedure, (a) Visual Basic is governed by an...

(a) Visual Basic is governed by an event processor. Explain the meaning of this phrase. (b) Differentiate between an event procedure and a general procedure. (c) "For datab

Give the procedure of the delphi method, Give the procedure of the Delphi m...

Give the procedure of the Delphi method. 1. The co-ordinator shows a specification and estimation form to each expert. 2. Co-ordinator calls a group meeting in which the exp

Illustrate iterative waterfall model, Iterative waterfall model The ite...

Iterative waterfall model The iterative waterfall model is as shown in the following figure. Requirement gathering phase in which all needs are identified. The design

Define behavioural modelling, Define Behavioural Modelling. The state t...

Define Behavioural Modelling. The state transition diagram shows the characteristics of a system by depicting its states and the events that cause the system to change state

Determine the cyclomatic complexity, Q. Consider the program given below ...

Q. Consider the program given below void main() { int i,j,k; readln (i,j,k); if( (i k) ) { writeln("then part"); if (j writeln ("j

E-R diagram, Draw an E-R diagram for the following situation: an account is...

Draw an E-R diagram for the following situation: an account is a relationtion between cutosmer and bank. A customer had a name.

Possible features of good data, Decision-making is the activity of deciding...

Decision-making is the activity of deciding appropriate action in given situations. Having useful information helps to reduce the uncertainty in decision-making. Information is

Searching the database - micro cds/isis application, Searching the Database...

Searching the Database: Searching the database and printing the results of a search are important features associated with CDS/ISIS package. The query formulation strategy pro

What are the debugging programs, Q. What are the Debugging programs? De...

Q. What are the Debugging programs? Debugging programs:-A program which runs simultaneously with the program under test and provides commands to examine memory and registers st

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