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
Command Line Interfaces: These are interactive interfaces, character-based that let you use the complete power and functionality of the DBMS query language directly. They permit yo

Submit the SQL Statements necessary to create your database according to the following guidelines: Your SQL statements should exactly mirror your ERD. All primary keys,

What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.

Question 1 Discuss the classification of DBMS based on location of database Question 2 Explain with examples different SQL commands used for creating and deleting relations.

Increased parallelism : Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have

Define weak and strong entity sets? Weak entity set: entity set that do not have key attribute of their own are known as weak entity sets. Strong entity set: Entity set that

I need some help with my normalization database homework.

The database files accept the actual data and are typically the biggest in size. Depending on their shape, the tables for all the user operation can go in one database file-but

Ask question #Minim 100 words accepted#what is recovery management component in database management system and how it is useful

Normalize the given relation to 3NF, justifying each step