Lesson 2: Setting Up Replication in .NET framework

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Lesson 2: Setting Up Replication
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The following code block shows the publication configuration script that the New Publication Wizard generates:
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Publication Configuration Script
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use [AdventureWorksRepl] exec sp_replicationdboption @dbname = N'AdventureWorksRepl' , @optname = N'publish' , @value = N'true' GO -- Adding the snapshot publication use [AdventureWorksRepl] exec sp_addpublication @publication = N'MSPressRepl' , @description = N'Snapshot publication of database ''AdventureWorksRepl'' from Publisher ''COMPUTERNAME''.' , @sync_method = N'native' , @retention = 0 , @allow_push = N'true' , @allow_pull = N'true' , @allow_anonymous = N'true' , @enabled_for_internet = N'false' , @snapshot_in_defaultfolder = N'true' , @compress_snapshot = N'false' , @ftp_port = 21 , @allow_subscription_copy = N'false' , @add_to_active_directory = N'false' , @repl_freq = N'snapshot' , @status = N'active' , @independent_agent = N'true' , @immediate_sync = N'true' , @allow_sync_tran = N'false' , @allow_queued_tran = N'false' , @allow_dts = N'false' , @replicate_ddl = 1 GO exec sp_addpublication_snapshot @publication = N'MSPressRepl' , @frequency_type = 4 , @frequency_interval = 1 , @frequency_relative_interval = 1 , @frequency_recurrence_factor = 0 , @frequency_subday = 1 , @frequency_subday_interval = 1 , @active_start_time_of_day = 0 , @active_end_time_of_day = 235959 , @active_start_date = 0 , @active_end_date = 0 , @job_login = null , @job_password = null , @publisher_security_mode = 1 use [AdventureWorksRepl] exec sp_addarticle @publication = N'MSPressRepl' , @article = N'SalesOrderDetail' , @source_owner = N'Sales'
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Managing Replication
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@source_object = N'SalesOrderDetail' @type = N'logbased', @description = null @creation_script = null @pre_creation_cmd = N'drop' @schema_option = 0x000000000803509D @identityrangemanagementoption = N'manual' @destination_table = N'SalesOrderDetail' @destination_owner = N'Sales' @vertical_partition = N'false'
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GO use [AdventureWorksRepl] exec sp_addarticle @publication = N'MSPressRepl' , @article = N'SalesOrderHeader' , @source_owner = N'Sales' , @source_object = N'SalesOrderHeader' , @type = N'logbased' , @description = null , @creation_script = null , @pre_creation_cmd = N'drop' , @schema_option = 0x000000000803509D , @identityrangemanagementoption = N'manual' , @destination_table = N'SalesOrderHeader' , @destination_owner = N'Sales' , @vertical_partition = N'false' GO
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As with the previous script for creating the Distributor, this script contains parameters that are specific to your environment. The script that the New Publication Wizard generates uses four stored procedures to create the publication configuration. The first procedure, sp_replicationdboption, enables replication in a database. The parameter @optname supports the following values: merge publish for merge replication, publish for snapshot and transactional replication, subscribe for subscription, and sync with backup for a special type of transactional replication that forces backups of the transaction log before sending transactions to the distribution database. The sp_addpublication stored procedure creates the publication when the publication type is snapshot or transactional. The @sync_method parameter specifies the format the bulk copy files use. Use native format when the replication includes only SQL Server subscriptions, and use character format when other platforms (such as Microsoft Office Access, Oracle, or IBM DB2) subscribe to the publication. You use the parameters @enabled_for_internet, @ftp_port, @ftp_address, @ftp_subdirectory, @ftp_login, and @ftp_password when subscribers use the Internet to connect for replicating the database. The @enabled_for_internet parameter enables the configuration, and the rest of the parameters set the configuration of the Snapshot folder.
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Lesson 2: Setting Up Replication
The sp_addpublication_snapshot stored procedure configures the job that runs the Snapshot Agent. You configure the job schedule by using the following parameters: @frequency_type, @frequency_interval, @frequency_relative_interval, @frequency_recurrence_ factor, @frequency_subday, @frequency_subday_interval, @active_start_time_of_day, @active_ end_time_of_day, @active_start_date, and @active_end_date. In the sample script, the Snapshot Agent job is set to run once a day every day.
MORE INFO
Schedules
If you want a better understanding of the schedule parameters that the Snapshot Agent job uses, review the documentation about sp_add_schedule in SQL Server 2005 Books Online. To gain a good understanding of the parameter semantics, you can create a job with multiple schedules and generate a script to review the resulting parameter settings.
The last three parameters of sp_addpublication_snapshot @job_login, @job_password, and @publisher_security_mode set the security context of the job. You will find more information about replication security in the next lesson. Finally, the sp_addarticle stored procedure is executed multiple times, once per article in the publication, to configure the database objects that will be published. You configure the publication, article name, and object to publish by using the parameters @publication, @article, @source_owner, and @source_object. When you want to create a script that configures a large number of articles with the same options, copy and paste this procedure, replacing the parameter values with the appropriate object names. The sp_addarticle @type parameter sets what will be published: the schema, the data, or the execution. For example, to publish table or view data, use the logbased value; to copy the schema of a stored procedure or view, use proc schema only or view schema only, respectively; and to replicate the execution of the stored procedure, use proc exec.
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