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Replication: SQL Server 2000 - Part 1


In this first installment of a 2-part series, Mahesh describes and explains what Replication is, its features and benefits, and how you can put it to use.

Author Info:
By: Mahesh Kodli
Rating: 4 stars4 stars4 stars4 stars4 stars / 210
November 10, 2003
TABLE OF CONTENTS:
  1. · Replication: SQL Server 2000 - Part 1
  2. · Replication Benefits
  3. · SQL Server Platform for Replication
  4. · Entities for the SQL Server Replication Model
  5. · Entities Further Explained...
  6. · Implementing Replication
  7. · Implementing Replication, Cont'd

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Replication: SQL Server 2000 - Part 1 - Entities for the SQL Server Replication Model
(Page 4 of 7 )

Publisher

Publisher is a server that makes the data available for subscription to other servers. In addition to making data available for replication, a publisher also identifies what data has changed at the subscriber during the synchronizing process. Depending on the type of replication, changed data is identified at different instances. We will learn more about Replication types in the Replication Types section.

Distributor

Distributor maintains the Distribution Database. The role of the distributor varies depending on the type of replication.  Two types of Distributors are identified: Remote distributor and Local distributor. Remote distributor is separate from publisher and is configured as a distributor for replication. Local distributor is a server that is configured as a publisher and a distributor.

Agents

Agents are the processes that are responsible for copying and distributing data between Publisher and subscriber. There are different types of Agents supporting different replication types.

Subscriber

Subscriber is a server that receives and maintains the published data. Modifications to the data at the subscriber-level can be propagated back to the publisher; in some cases Subscriber may re-publish the data to the other subscribers.

Articles

An article can be any database object, viz. Tables (Column filtered or Row filtered), Views, Indexed views, Stored Procedures, User defined functions.

Publication

Publication is collection of articles.

Subscriptions

Subscription is a request for copy of data or database objects to be replicated.


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