Lesson 2: Setting Up Replication in VS .NET

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Lesson 2: Setting Up Replication
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Here is how to configure the Distributor as a local Distributor: 1. Open SSMS. 2. Connect to the database engine instance you want to configure as Publisher and Distributor. 3. Right-click the Replication folder and choose Configure Distribution. 4. On the Configure Distribution Wizard page, click Next. 5. On the Distributor page, select server_name Will Act As Its Own Distributor and click Next. 6. On the Snapshot Folder page, type the path to a local folder or the Universal Naming Convention (UNC) name for a shared folder in which you want to store the files that will hold the publication s schema and data. Click Next.
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Snapshot folder choices
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Consider three important factors as you make your Snapshot folder choice. First, if your subscription topology uses pull subscriptions, use a UNC network path. Second, plan how much space the snapshot files will occupy. And finally, secure the folder and grant permission to only the Snapshot Agent (write) and to the Merge or Distribution Agent (read). Lesson 3 in this chapter provides more details about how to secure replication.
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7. On the Distribution Database page, type the name of the database and the path of its data and log files, as Figure 19-7 shows. By default, SQL Server names this database distribution and places it in the \Program Files\Microsoft SQL Server\ MSSQL.x\MSSQL\Data folder, where x is the number assigned to the instance on which you are configuring replication. Click Next.
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Configuring the distribution database
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Transactional replication demands more from the distribution database than any other replication type. If you plan to use transactional replication in large and volatile databases, consider placing the log and data files of the distribution database in different disk channels, using RAID 1 or RAID 10 for the data files and RAID 1 for the log files.
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8. On the Publishers page, add other publishers you want to authorize as Publishers to this Distributor, and click Next. By default, SSMS also configures the Distributor as a Publisher. 9. On the Wizard Actions page, you can use the available check boxes to indicate whether you want SSMS to execute the commands now, script them, or both. By default, the Configure Distribution check box is selected. Click Next.
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19
Managing Replication
Figure 19-7 Configuring the distribution database
10. If you chose to script the commands, you now see the Script File Properties page. You use this page to configure the name, path, and format of the script. By default, SQL Server creates this script file in your My Documents folder. You can also specify whether you want SQL Server to overwrite an existing script file with the same name or to append this script to it. Click Next.
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Scripting the configuration
Scripting the Distributor configuration is a good idea for documentation purposes; plus, you can use the script in a recovery plan. Additionally, you can use scripts to create more complex database file configurations.
11. On the Complete The Wizard page, review the summary of choices you made and then click Finish. 12. Wait for the Configure Distribution Wizard to complete the configuration. After it finishes, click Close. The following code block shows the Distributor configuration script:
Distributor Configuration Script
/*** Scripting replication configuration for server COMPUTERNAME. ***/ /*** Please Note: For security reasons, all password parameters were scripted with either NULL or an empty string. ***/ /*** Installing the server COMPUTERNAME as a Distributor. ***/
Lesson 2: Setting Up Replication
use master exec sp_adddistributor @distributor = N'COMPUTERNAME', @password = N'' GO exec sp_adddistributiondb @database = N'distribution' , @data_folder = N'C:\MSSQL\Data' , @data_file_size = 4 , @log_folder = N'C:\MSSQL\Data' , @log_file_size = 2 , @min_distretention = 0, @max_distretention = 72 , @history_retention = 48, @security_mode = 1 GO use [distribution] if (not exists (select * from sysobjects where name = 'UIProperties' and type = 'U ')) create table UIProperties(id int) if (exists (select * from ::fn_listextendedproperty('SnapshotFolder' , 'user', 'dbo', 'table', 'UIProperties', null, null))) EXEC sp_updateextendedproperty N'SnapshotFolder' , N'C:\MSSQL\ReplData', 'user', dbo, 'table' , 'UIProperties' else EXEC sp_addextendedproperty N'SnapshotFolder' , 'C:\MSSQL\ReplData' , 'user', dbo, 'table', 'UIProperties' GO exec sp_adddistpublisher @publisher = N'COMPUTERNAME' , @distribution_db = N'distribution' , @security_mode = 1, @working_directory = N'C:\MSSQL\ReplData' , @trusted = N'false', @thirdparty_flag = 0 , @publisher_type = N'MSSQLSERVER' GO
Be aware that the @distributor, @data_folder, @log_folder, SnapshotFolder, @working_ directory, and @publisher parameters you see in this script are all specific to your environment. The Distributor configuration script that the wizard generates uses three main stored procedures. The first procedure, sp_adddistributor, defines the Distributor when the server acts as Publisher. To configure the server as its own Distributor, set the @distributor parameter to its own server name; to use a remote server, use the remote server name. The second stored procedure, sp_adddistributiondb, creates the distribution database with the specified parameters. If you want to use a distribution database with multiple data files or filegroups, first create the database by using a CREATE DATABASE statement and set the name in the @database parameter. In addition, sp_adddistributiondb uses retention parameters to control how many hours SQL Server stores transactions in the database before it erases them (this affects only transactional replication). If the Distribution Agent fails to copy the transactions within the maximum specified
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