How is merge replication implemented in SQL Server?

How is merge replication implemented in SQL Server?

Merge replication is implemented by the SQL Server Snapshot Agent and Merge Agent. If the publication is unfiltered or uses static filters, the Snapshot Agent creates a single snapshot. If the publication uses parameterized filters, the Snapshot Agent creates a snapshot for each partition of data.

What happens to rowguid column in Merge Replication?

Merge Replication. If the table is dropped from the publication, the rowguid column is removed; if an existing column was used for tracking, the column is not removed. A filter must not include the rowguidcol used by replication to identify rows. The newid () function is provided as a default for the rowguid column,…

How does merge agent work in SQL Server?

The Merge Agent applies the initial snapshots to the Subscribers. It also merges incremental data changes that occurred at the Publisher or Subscribers after the initial snapshot was created, and detects and resolves any conflicts according to rules you configure.

How does synchronization work in Microsoft SQL Server?

Subsequent data changes and schema modifications made at the Publisher and Subscribers are tracked with triggers. The Subscriber synchronizes with the Publisher when connected to the network and exchanges all rows that have changed between the Publisher and Subscriber since the last time synchronization occurred.

Why is SQL server replication not possible on two different domains?

This is failing because the two domains do not trust each other. Because of that, a process executing under an account in the one domain cannot use windows authentication to connect to a SQL Server in the other domain. To get around this, you have three options: Create a trust relationship between the two domains. Use path-through authentication.

How to set up replication between two computers?

This approach is covered in the section Use Windows Authentication to Set Up Replication Between Two Computers Running SQL Server in Non-Trusted Domains in HOW TO: Replicate Between Computers Running SQL Server in Non-Trusted Domains or Across the Internet. This is failing because the two domains do not trust each other.

How to do replication across non-trusted domains?

Replication across non-trusted domains or workgroups can be done using Windows Authentication by configuring pass-through authentication. Create a local Windows account on both the Publisher and Subscriber that has the same username and password.

What are the different types of SQL server replication?

SQL Server has snapshot, transactional, and merge replication. Each replication type is best suited for one or more sets of scenarios. This section discusses different types of replication and scenarios in which they should be used.

How does transactional replication work in SQL Server?

This replication type uses the log files associated with the source database to keep data in sync. If a change is made to the source database, that change can be synched to the target database immediately, or the synchronization can be scheduled.

When to use replication or failover in SQL Server?

We would use SQL Server Always On Failover Cluster or Database Mirroring before Always ON Avalability Group as the HA (High Availability) solution. We usually use Replication when a table or tables should be regularly transferred to another server for reporting purposes.

How to use parameterized row filters in Merge Replication?

With merge replication, use parameterized row filters rather than creating multiple publications with static row filters. For more information, see Parameterized Row Filters. To define or modify a static row filter, see Define and Modify a Static Row Filter.

Do you need a primary key for merge publications?

Primary keys are not required for tables in merge publications, but if a primary key column is present, it cannot be filtered. All publications created using the New Publication wizard. You can filter foreign key columns using Transact-SQL stored procedures. For more information, Define and Modify a Column Filter.