Ali Shaik's Database Diary

 Voting in SQL cluster Voting is a critical component of a SQL cluster that helps to ensure high availability and failover readiness. In a SQL cluster, voting is used to determine which nodes are eligible to participate in quorum and which nodes should be considered to be in a failed state. By configuring voting in a SQL cluster, you can ensure that the cluster is highly available and ready for failover in the event of a node failure.   Here are the general steps for configuring voting in a SQL cluster: Step 1: Identify the number of nodes in the SQL cluster The first step in configuring voting in a SQL cluster is to identify the number of nodes in the cluster. For a two-node cluster, a disk or file share witness can be used as the third vote. For clusters with three or more nodes, the nodes themselves can be used as voting members. Step 2: Determine the number of votes required to achieve quorum The next step is to determine the number of votes required to achieve quorum

  Differences between the Developer, Standard, and Enterprise Editions for SQL Server Always On Availability Groups SQL Server Always On Availability Groups is a high-availability and disaster recovery solution that is available in SQL Server Developer, Standard, and Enterprise Editions. However, the specific features and limitations of Always On Availability Groups may differ across these editions. Maximum number of replicas: Developer Edition supports up to two replicas (primary and one secondary). Standard Edition supports up to two replicas (primary and one secondary). Enterprise Edition supports up to eight replicas (one primary and seven secondary). Readable secondary replicas: Developer Edition supports readable secondary replicas for reporting or backup purposes. Standard Edition supports readable secondary replicas for reporting or backup purposes. However, it does not support read-only routing. Enterprise Edition supports both readable secondary replicas and read-only routing