Define two-phase locking protocol, Database Management System

Assignment Help:

Define two-phase locking protocol.

Ans: Two-phase locking is significance in the context of ensuring that schedules are serializable. The two-phase locking protocol defines a process each transaction follows.

The two-phase locking protocol

1. Previous to operating on any row, a transaction must obtain a lock on that row.

2. After releasing a lock, a transaction should never obtain any more locks.

Related Discussions:- Define two-phase locking protocol

What are the ways in which signal can be generated, What are the ways in wh...

What are the ways in which signal can be generated A signal might be generated in many ways such as a Signal is result of particular physical condition. Whenever a process writ

What is a transaction? and how does it differs from update, wh

Define the terms- ddl and dml, Define the terms i) DDL ...

Define the terms i) DDL ii) DML DDL: Data base schema is specified by a set of definitions expressed by a special language known as a data def

Prepare a site map and submit it in bing and google, Project Description: ...

Project Description: I am updating my Javascript + HTML website with five domains for the same website I would like to know if I want to create site map and submit it in all the

Oracle RDBMS, compare the features of oracle RDBMS with MySQL and Microsoft...

compare the features of oracle RDBMS with MySQL and Microsoft SQL server

What is data model explain object and data base models, What is data model?...

What is data model? Explain object based and record based data models? Ans: A data model is an abstract model in which describes how data is represented and accessed. (i)

What are the three types of data sources, What are the three types of data ...

What are the three types of data sources used with ODBC? An ODBC file data source is a file that can be shared between database users. An ODBC system data source is one that is

What is candidate key, What is candidate key? Candidate Key - A candi...

What is candidate key? Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.

Obtain the house numbers street wise from database, For the relations answe...

For the relations answer the following queries in SQL Street (name, location, city) House (number, street_name) Lives (name, house_number) (i) Obtain the names of persons who liv

What is multiplicity in the associations, What is multiplicity in the assoc...

What is multiplicity in the associations? Give an example to explain multiplicity? Multiplicity in association indicate number of objects participate in any relationship. For

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages