Contents
- 1 What does replication distribution agent do in SQL Server?
- 2 When does the replication agent report no transaction?
- 3 How to configure server to server storage replication?
- 4 What should the firewall rules be for server to server replication?
- 5 What does configure distribution do in SQL Server?
- 6 How does merge replication topologies use pull subscriptions?
What does replication distribution agent do in SQL Server?
Applies to: SQL Server (all supported versions) Azure SQL Database The Replication Distribution Agent is an executable that moves the snapshot (for snapshot replication and transactional replication) and the transactions held in the distribution database tables (for transactional replication) to the destination tables at the Subscribers.
When does the replication agent report no transaction?
The TransactionsPerHistory value is reached after the last history event is logged. The MessageInterval value is reached after the last history event is logged. If there is no replicated transaction available at the source, the agent reports a no-transaction message to the Distributor.
Where does failure occur in a replication transaction?
This file is generated at any point where failure occurred while applying replication transactions at the Subscriber; errors that occur at the Publisher or Distributor are not logged in this file. This file contains the failed replication transactions and associated error messages.
How to find errors with transactional replication in SQL Server?
This view shows you two agents, the Snapshot Agent and the Log Reader Agent. The one that’s encountering an error has the red X. In this case, it’s the Log Reader Agent. Double-click the line that’s reporting the error to open the agent history for the Log Reader Agent.
How to configure server to server storage replication?
Configure roles as follows: Windows Admin Center method. In Windows Admin Center, navigate to Server Manager, and then select one of the servers. Navigate to Roles & Features. Select Features > Storage Replica, and then click Install.
What should the firewall rules be for server to server replication?
At least one ethernet/TCP connection on each server for synchronous replication, but preferably RDMA. Appropriate firewall and router rules to allow ICMP, SMB (port 445, plus 5445 for SMB Direct) and WS-MAN (port 5985) bi-directional traffic between all nodes.
How to replicate between Azure VMs and on-premises servers?
If you’re replicating between on-premises servers and Azure VMs, you must create a network link between the on-premises servers and the Azure VMs. To do so, use Express Route, a Site-to-Site VPN gateway connection, or install VPN software in your Azure VMs to connect them with your on-premises network.
Why are remote distributors more common in Merge Replication?
Remote Distributors are more common in transactional replication than they are in merge replication for two reasons: The Distributor plays a larger role in transactional replication because all replicated transactions are written to and read from the distribution database.
What does configure distribution do in SQL Server?
Configure Distribution. The Distributor is a server that contains the distribution database, which stores metadata and history data for all types of replication and transactions for transactional replication. To set up replication, you must configure a Distributor.
How does merge replication topologies use pull subscriptions?
Merge replication topologies typically use pull subscriptions, so agents run at each Subscriber, rather than all running at the Distributor. For more information, see Subscribe to Publications.