1 Chapter Overview Introducing Replication Planning for Replication Implementing Replication Monitoring and Administering Replication.

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Presentation transcript:

1 Chapter Overview Introducing Replication Planning for Replication Implementing Replication Monitoring and Administering Replication

2 Reasons to Replicate Information Reducing network traffic between remote locations and central server Separating OLTP and OLAP operations for performance Combining data from multiple locations Data redundancy Supporting mobile users Scaling out

3 Types of Replication Snapshot Transactional Merge

4 Replication Terminology

5 Snapshot Replication

6 Transactional Replication

7 Merge Replication

8 Physical Replication Models

9 Replication Implementation Tools SQL Server Enterprise Manager and Replication Monitor ActiveX controls, SQL-DMO, and Replication Distributor Interface System stored procedures Windows Synchronization Manager Active Directory

10 Replication Security Planning Only sysadmin members can create and administer replication. Sysadmin and db_owner members can create and configure publications. Publisher uses the distributor_admin SQL Server account to connect to remote Distributor. Snapshot folder uses hidden admin share by default. Agents run in security context of SQL Server Agent by default and must have appropriate access rights.

11 Filtering Data

12 Initial Snapshot Options Stored in Repldata folder on the Distributor by default. Alternate locations include network drives or compact disc, and files can be compressed using CAP file format. Maintaining snapshot files is optional, unless anonymous Subscribers are permitted.

13 Distributor Configuration Share with Publisher or use remote Distributor. Use hidden admin share for snapshot folder, or create explicit share. Specify distribution database location, such as RAID. Enable Publishers.

14 Publisher Configuration Default vs. alternate snapshot folder. Security context for replication agents. Enable security for remote Distributor. Enable databases for replication. Enable Subscribers.

15 Subscriber Configuration Configure properties for replication agents connecting to Subscribers. Specify security context for Subscriber connection. Specify schedule for Distribution and Merge Agents.

16 Publication Creation Specify updatable or transformable subscriptions. Specify Subscriber types. Specify articles and their properties. Choose whether or not to list in Active Directory. Configure horizontal and/or vertical filters. Set schedule.

17 Push Subscriptions Choose Subscribers, and select destination database. Define Distribution or Merge Agent location and schedule. Define subscription initialization properties. Configure updatable or transformable subscription properties. For merge publications, define subscription priority for conflict resolution. Start required services.

18 Pull Subscriptions Locate publication using Active Directory, or locate on registered servers. Specify destination database. Specify named or anonymous subscription. Specify updatable subscription properties, including authentication. Specify snapshot delivery information. Specify Distribution or Merge Agent schedule, including on demand.

19 Replication Monitor

20 Distributor, Publisher, and Publication Properties Distributor properties, including retention periods Publication properties, including subscription expiration setting and status New and existing replication agent profiles Subscription properties, including agent location and status

21 Replication Conflicts and Pull Subscription Properties Microsoft Replication Conflict Viewer Windows Synchronization Manager Alternate synchronization partners Subscriber, Publisher, and Distributor login properties Enabling interactive resolution

22 Chapter Summary Replication uses the Publisher – Distributor – Subscriber metaphor. Choose snapshot, transactional or merge replication. Understand security context issues for replication agents. Choose subscription type based on performance requirements and administrative convenience. Consider enabling interactive conflict resolution for merge replication.