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How does merge replication work?
Merge replication allows data changes to be synchronized between the publisher and several subscribers. If one subscriber changes a row in a published table, that change will be replicated to the publisher during the next synchronization of this subscriber.
What are the required constraints in merge replication?
Merge replication does not require a primary key, but if one is present, it must be replicated. Snapshot replication does not require a primary key. By default, primary key constraints, indexes, and check constraints are replicated to Subscribers.
What is the difference between transactional replication and merge replication?
Merge Replication is the same as SQL Server Transactional replication; however, Merge replication replicates data from the Publisher to Subscriber and vice-a-versa. Merge replication uses the Snapshot Agent and the Merge Agent.
On which basis merge replication works on?
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.
How do you resolve conflict in merge replication?
By default, merge replication uses priority-based logic to resolve conflicts. If a conflicting change is made in two Subscriber databases, the change for the Subscriber with the higher subscription priority wins, or if the priority is the same, the first change to reach the Publisher wins.
What is sharding and replication?
Replication: The primary server node copies data onto secondary server nodes. Sharding: Handles horizontal scaling across servers using a shard key. This means that rather than copying data holistically, sharding copies pieces of the data (or “shards”) across multiple replica sets.
How do you do transactional replication?
Connect to the publisher in SQL Server Management Studio. In the Object explore, right-click the Replication folder, and then select Launch Replication Monitor to verify the status of the newly created transactional replication setup.
What are the benefits of peer-to-peer replication?
Because data is maintained across the nodes in near real-time, peer-to-peer replication provides data redundancy, which increases the availability of data. Consider a Web application. This can benefit from peer-to-peer replication in the following ways: Catalog queries and other reads are spread across multiple nodes.
How does merge replication work in SQL Server?
This article will show how triggers, indexes, constraints and foreign keys will replicate in snapshot and after snapshot in SQL Server replication. Merge replication is used to replicate data from a publisher to a subscriber database and vice versa.
How to create replication in SQL Server management studio?
Now let us create SQL Server merge replication and add these tables to the merge publication. Login to server using SQL Server Management studio -> Navigate to the SQL Server replication folder -> click on Local publications -> right click -> click on New Publication. Please refer to the below image.
Which is a type of replication in SQL Server?
Connect and share knowledge within a single location that is structured and easy to search. A type of replication in SQL Server in which Publishers and Subscribers can work autonomously and later reconnect, synchronize, and merge data changes to achieve convergence among all nodes in the topology.
What to do if index does not replicate in SQL Server?
After SQL Server replication sync go to the subscriber and check for newly created index. The new index which we created did not replicated. Let us disable the index on table PARENT1 at publisher database. Disable index did not replicate to the subscriber. We can check that from below query.