Contents
How do you set Replication with always on?
In this article
- Configure the Database Publications and Subscriptions.
- Configure the Always On Availability Group.
- Ensure that all of the Secondary Replica Hosts are Configured for Replication.
- Configure the Secondary Replica Hosts as Replication Publishers.
- Redirect the Original Publisher to the AG Listener Name.
What is SQL always on Replication?
SQL Server replication supports the automatic failover of the publisher and the automatic failover of transactional subscribers. Merge subscribers can be part of an availability group, however manual actions are required to configure the new subscriber after a failover.
What’s the difference between AlwaysOn and transactional replication?
Replication is always table level. Lot of maintenance work. There is a latency and latency may increase in busy system. Need to configure it for each table. Not a high availability option. You can use it as a DR strategy. High Availability and Disaster recovery strategy. Built on top of Windows Failover Clustering framework.
How are availability groups used in transactional replication?
Availability Groups capture the transactional activity on the database at the point where it is written to the transaction log. The transaction log records are then sent to the secondary instances where they are written into the transaction log there to persist the activity which is then replayed into the actual databases.
How does SQL server replication support automatic failover?
SQL Server replication supports the automatic failover of the publisher and the automatic failover of transactional subscribers. Merge subscribers can be part of an availability group, however manual actions are required to configure the new subscriber after a failover.
How does transactional replication work in SQL Server?
Transactional Replication — Transactional Replication usually starts with a Snapshot Replication to create the same copies of the DB in the two or more servers. Afterward, every transaction that performed in one server will execute in the second server too within NRT.