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Availability Group Properties/New Availability Group (General Page)

  • Článek

This topic applies to the General tab of both the New Availability Group dialog box and the Availability Group Properties dialog box. The New Availability Group dialog box enables you to create a new availability group without using the New Availability Group Wizard. The Availability Group Properties dialog box enables you to view and alter the configuration of an existing availability group.

To view availability group properties

  • Availability group name
    Name of the availability group. This is a user-specified name that must be unique within the Windows Server Failover Cluster (WSFC).

Availability Databases

  • Database Name
    Name of a database that has been added to the availability group.

  • Add
    Click to add a database to the availability group.

  • Remove
    Click to remove a selected database from the availability group.

Availability Replicas

  • Server instance
    Server name of the instance of SQL Server that is hosting this replica and, for a non-default instance, its instance name.

  • Role

    • Primary
      Currently the primary replica.

    • Secondary
      Currently a secondary replica.

    • Resolving
      Currently the replica role is in the process of being resolved to either the primary or secondary role.

  • Availability Mode
    The availability mode of the replica, one of:

    • Asynchronous commit
      The primary replica can commit transactions without waiting for the secondary to write the log to disk.

    • Synchronous commit
      The primary replica waits to commit a given transaction until the secondary replica has written the transaction to disk.

      For more information, see Availability Modes (AlwaysOn Availability Groups).

  • Failover Mode
    The failover mode of the replica, one of:

    • Automatic
      Automatic failover. The replica is a target for automatic failovers. This is supported only if the availability mode is set to synchronous commit.

    • Manual
      Manual failover. The replica can only be failed over to manually by the database administrator.

  • Connections in Primary Role
    The type of client connections supported when the replica owns the primary role.

    • Allow all connections
      All connections are allowed to the databases in the primary replica. This is the default setting.

    • Allow read/write connections
      Connections where the Application Intent connection property is set to ReadOnly are disallowed. When the Application Intent property is set to ReadWrite or the Application Intent connection property is not set, the connection is allowed. For more information about Application Intent connection property, see Using Connection String Keywords with SQL Server Native Client.

  • Readable Secondary
    Whether an availability replica that is performing the secondary role (that is, a secondary replica) can accept connections from clients, one of:

    • No
      No direct connections are allowed to secondary databases of this replica. They are not available for read access. This is the default setting.

    • Read-intent only
      Only direct read-only connections are allowed to secondary databases of this replica. The secondary database(s) are all available for read access.

    • Yes
      All connections are allowed to secondary databases of this replica, but only for read access. The secondary database(s) are all available for read access.

  • Session Timeout (seconds)
    The number of seconds for the session-timeout period on this replica.

  • Endpoint URL
    The URL of the endpoint. For information the format of these URLs, see Specify the Endpoint URL When Adding or Modifying an Availability Replica (SQL Server).

  • Add
    Click to add a secondary replica to the availability group.

  • Remove
    Click to remove a secondary replica from the availability group.

See Also

Concepts

Overview of AlwaysOn Availability Groups (SQL Server)