1 Chapter Overview Using Standby Servers Using Failover Clustering.

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Presentation transcript:

1 Chapter Overview Using Standby Servers Using Failover Clustering

2 Standby Servers A secondary server that is kept up to date with the primary server Used in place of primary server in the event of failure or when maintenance is required Also used to offload reporting and analysis tasks

3 Steps to Promote a Standby Server

4 Automatic Log Shipping Available only with the Enterprise Edition. Use the Database Maintenance Plan wizard to create jobs. Use alerts to notify administrators of log shipping failures. Use a central monitoring server for monitoring primary/standby server pairs.

5 Log Shipping Monitor Located in the Management container in Microsoft SQL Server Enterprise Manager on the monitoring server Displays the status of all log shipping pairs Allows you to view backup history and copy/restore history for each log shipping pair Allows you to view properties of each log shipping pair, including job frequencies and alert schedules

6 Promoting a Standby Server sp_change_primary_role sp_change_secondary_role sp_change_monitor_role Create necessary logins

7 Microsoft Cluster Service (MSCS)

8 SQL Server on a Server Cluster The Setup program installs a virtual server across two or more nodes. An IP address (or addresses) is assigned to the virtual server. Executable files are installed on all nodes, and data files are installed on the shared storage system. One node is primary; other nodes are passive to this virtual server.

9 Cluster Types Active/Passive Active/Active

10 Planning Issues Run Cluster wizard before install to use MS DTC. Dynamic memory management. Set recovery interval to zero. Change service account passwords with SQL Server Enterprise Manager. Use the shared disk for replication snapshot files.

11 Disaster Recovery Recovery of database occurs automatically. Failover node takes over and handles all current connections. Run Setup program to remove failed node. After repair, rerun Setup program and add the rebuilt node.

12 Chapter Summary Standby servers shorten the length of time required to recover from a server failure. Log shipping automates the maintenance of a standby server. Server clusters provide the most rapid recovery in the event of a server failure. Choose either active/passive or active/active.