Linear commit protocol, Database Management System

With the linear commit protocol, sites are connected in a chain, and the subtransaction at the left-hand end of the chain initiates the protocol. Propose a crash recovery protocol for a site in the chain. Consider the following three points at which the crash might occur and state in each case (1) how the site determines from its log that it is at that point and (2) what action it takes (beyond standard recovery processing)

(a)  The site crashes before the first message from its left-hand neighbor arrives.

(b)  The site crashes after sending the first message to its neighbor on the right, but before receiving a message from its neighbor on the right.

(c)  The site crashes after sending a message to its neighbor on the left but before receiving the second message from its neighbor on the left.

 

Posted Date: 3/11/2013 1:18:58 AM | Location : United States







Related Discussions:- Linear commit protocol, Assignment Help, Ask Question on Linear commit protocol, Get Answer, Expert's Help, Linear commit protocol Discussions

Write discussion on Linear commit protocol
Your posts are moderated
Related Questions
What is Stored Procedure? A stored procedure is a named group of SQL statements that have been previously formed and kept in the server database. Stored procedures accept input

Describe Object Relational model ? Object Relational Model - This model combines the characteristics of both relational model and object oriented model. It extends the tradit

Consider a database schema consisting of four relations, whose schemas are: Product (maker, model, type) PC (model, speed, ram, hd, price) Laptop (model, speed, ram, hd, s

How can we Classify the operations on classes  This step fundamentally means all three models functional, object and dynamic (studied in last section) must be combined so that

How external/conceptual mapping and conceptual /internal mapping is performed


how to submit answers softcopy

Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b

Databases and data warehouses both are databases and both contains number of rows and columns of tables containing data. Data warehouse is really different from databases because d

Explain the utilities which help the DBA to manage the database? Every DBA uses database utilities to maintain and control their databases. But there is a lot of confusion wit