Improved reliability, Database Management System

Improved Reliability:In a centralised DBMS, a server failure stops the operations of the DBMS. Though, a failure at single site of a DDBMS, or a failure of a communication link creation some sites inaccessible, does not make the whole system inoperable. Distributed DBMSs are designed to continue to function despite such as failures. In particular, if data are replicated in various sites, a transaction requiring a particular data item may find it at various sites. Therefore, the failure of a site does not necessarily imply the shutdown of the system.

The failure of one site must be identified by the system, and appropriate action may be required to recover from the failure. The system has no longer used the services of the failed site. At last, when the failed site recovers or is repaired, mechanisms have to be available to integrate it smoothly back into the system. The recovery from failure in distributed systems is much more difficult than in a centralised system.

 

Posted Date: 3/12/2013 5:54:49 AM | Location : United States







Related Discussions:- Improved reliability, Assignment Help, Ask Question on Improved reliability, Get Answer, Expert's Help, Improved reliability Discussions

Write discussion on Improved reliability
Your posts are moderated
Related Questions
What is meant by object identifiers? Object-oriented systems use an object identifier to recognize objects. Object identifiers are unique: that is every object has a single ide

Relational Algebra is a set of basic operations used to influence the data in relational model. These operations allow the user to specify basic retrieval request. The result of re

Describe the capabilities offered via MySQL client APIs? . • Checking for errors. . • Connecting to the MySQL server, selecting a database, disconnecting from the server

While sorting field groups we cannot use more than one key field False.

The cross-section of twisted pair The cross-section of each and every strand of the twisted pair is π/4 square mm. A 10-km length of this type of material, with two strands per


Insertion Anomaly: Inability to show certain information-The primary key of the over relation be (enrolment number, Cno). Any new tuple to be inserted in the relation should have

I need to Map an E-R diagram to a relational schema

Table Handling  In RDBMS more than one table can be tackled at a time by using join operation. Join operation is a relational operation that causes 2 tables with a common domai

under what condition log based recovery is feasible?