[SQL Server High Availability Solution] Build a database solution that never goes down

2024-07-08

Title: [SQL Server High Availability Solution] Build a Database Solution That Never Go Down

SQL Server, a relational database management system launched by Microsoft, is widely used in enterprise applications. In these applications, high availability of the database is crucial, as it ensures persistent storage and continuous access to data. This article will discuss in detail various strategies for achieving high availability in SQL Server, including failover clustering, mirroring, log shipping, backup and restore, etc.

1. The importance of high availability

High availability ensures that database services can be quickly restored in the event of hardware failures, software errors, or other problems.

2. Failover Cluster Instance (FCI) for SQL Server

Failover Cluster Instances provide a high availability solution that allows seamless failover between multiple servers.

CREATE CLUSTERED INDEX idx_emp ON dbo.Employees;
ALTER AVAILABILITY GROUP MyAG
    MODIFY REPLICA ON 'SecondaryReplica'
    WITH (PRIMARY_ROLE = 'SecondaryReplica', SECONDARY_ROLE = 'PrimaryReplica');

Technology Sharing