How to upgrade or patch replicated databases in SQL Server?

How to upgrade or patch replicated databases in SQL Server?

Side-by-side: Deploy a parallel environment and move databases along with the associated instance level objects, such as logins, jobs, etc. to the new environment. In-place upgrade: Allow the SQL Server installation media to upgrade the existing SQL Server installation by replacing the SQL Server bits, and upgrading the database objects.

When to upgrade replication topology in SQL Server?

Upgrading a replication topology is a multi-step process. We recommend attempting an upgrade of a replica of your replication topology in a test environment before running the upgrade on the actual production environment.

When to upgrade primary and standby DB Instances?

If your DB instance is in a Multi-AZ deployment, both the primary and standby DB instances are upgraded. The primary and standby DB instances are upgraded at the same time and you will experience an outage until the upgrade is complete. The time for the outage varies based on your database engine, engine version, and the size of your DB instance.

Why is my replication lagging on my primary database?

However, with persistent heavy write-intensive primary workloads, the replication lag could continue to grow and may never be able to catch-up with the primary. This may also increase storage usage at the primary as the WAL files are not deleted until they are received at the replica.

Can a database be migrated to a newer version?

Even when the compatibility level of the database that needs to be migrated to an older SQL Server version matches that version, the backup can’t be simply restored. Upgrading can also be a problem.

What to do when SQL server replication is not working?

Bring the new SQL Server instance online. Restart all of the replication agents and verify if the agents are running successfully. Validate if replication is working as expected. Use the SQL Server setup media to run an in-place upgrade of your SQL Server instance to the new version of SQL Server.

What happens if replication is disabled in SQL Server?

If the publication database fails over from the principal to the mirror and the mirroring relationship is subsequently disabled or removed, replication agents will not function against the mirror. If the principal is permanently lost, disable and then reconfigure replication with the mirror specified as the Publisher.

How does replication monitor work in SQL Server?

Replication Monitor displays Publisher nodes in the object tree for both the principal and the mirror. If the principal is the active server, publication information is displayed only under the principal node in Replication Monitor. If an agent has an error, the error is indicated only on the principal node, not on the mirror node.

Do you have to reboot SQL Server to install SP3?

You don’t have to stop SQL server agent due the installation process, SQL Agent and SQL Server will be stopped and started. Be aware sometime there is a pending reboot on the SQL Server. During the installation proccess at the end you could receive an error with pending reboot. You first have to reboot your SQL Server then you can install SP3.

When to install Service Pack 3 for SQL 2008R2?

Service Pack 3 for SQL 2008R2. All our SQL 2008R2 Servers are at the latest patch level of 2008R2. We had installed SP3 first on Development, Test an Acceptation. Wait 2 weeks and dit some application test before we installed SP3 on our Production Environment.