Can you have multiple SQL Server instances?
You can install multiple instances of SQL Server, or install SQL Server on a computer where earlier SQL Server versions are already installed. The following SQL Server-related items are compatible with the installation of multiple instances on the same computer: Database Engine. Analysis Services.
Can multiple SQL instances use the same port?
Each SQL Server instance must listen on a different TCP endpoint, but this does not mean that each instance has to listen on a different port: a TCP endpoint is made of an IP address and a port. This means that two instances can listen on the same port, as long as the IP addresses are different.
Do you have to use the same SQL Server instance for always on availability group?
Each server instance must be running the same version of SQL Server to participate in an Always On Availability Group. Editions and supported features for SQL 2014, SQL 2016, SQL 2017. All the server instances that host availability replicas for an availability group must use the same SQL Server collation.
What are the different types of availability groups?
An instantiation of an availability group that is hosted by a specific instance of SQL Server and maintains a local copy of each availability database that belongs to the availability group. Two types of availability replicas exist: a single primary replica and one to eight secondary replicas.
Can a cluster host more than one availability group?
A cluster node can host one replica for an availability group. The same node cannot host two replicas from the same availability group. The cluster node can participate in multiple availability groups, with one replica from each group.
How to create multiple listeners for same availability group?
As the PM who designed the availability group listener feature, when I talked to some customers , there’re 2 scenarios I realized may need to have multiple listeners for a single availability group. This Customer has a few legacy clients and he cannot change the connection string for them.