InfoScale™ 9.0 Cluster Server Implementation Guide for Microsoft SQL Server - Windows
- Section I. Introducing Veritas InfoScale solutions for application high availability
- Understanding the InfoScale solutions for application high availability
- About the Veritas InfoScale solutions for monitoring SQL Server
- About the VCS agents for SQL Server
- How VCS monitors storage components
- Shared storage - if you use NetApp filers
- Shared storage - if you use SFW to manage cluster dynamic disk groups
- Shared storage - if you use Windows LDM to manage shared disks
- Non-shared storage - if you use SFW to manage dynamic disk groups
- Non-shared storage - if you use Windows LDM to manage local disks
- Non-shared storage - if you use VMware storage
- How application availability is achieved in a physical environment
- How is application availability achieved in a VMware virtual environment
- Modifying the ESXDetails attribute
- Managing storage and installing the VCS agents
- Installing SQL Server
- About installing SQL Server for a high availability (HA) configuration
- Configuring Microsoft iSCSI initiator
- About installing SQL Server on the first system
- About installing SQL Server on additional systems
- Assigning ports for multiple SQL Server instances
- Enabling IPv6 support for the SQL Server Analysis Service
- Understanding the InfoScale solutions for application high availability
- Section II. Configuring SQL Server in a physical environment
- Overview
- Configuring the VCS cluster
- Configuring the SQL Server service group
- About configuring the SQL Server service group
- Before configuring the SQL Server service group
- Configuring a SQL Server service group using the wizard
- Configuring the service group in a non-shared storage environment
- Running SnapManager for SQL Server
- About the modifications required for tagged VLAN or teamed network
- Making SQL Server user-defined databases highly available
- Verifying the service group configuration
- Administering a SQL Server service group
- Configuring an MSDTC service group
- Configuring the standalone SQL Server
- Configuring an Active/Active cluster
- Configuring a disaster recovery setup
- Section III. Appendixes
- Appendix A. Troubleshooting
- VCS logging
- VCS Cluster Configuration Wizard (VCW) logs
- VCWsilent logs
- NetApp agents error messages
- Error and warning messages from VCS agent for SQL Server
- Messages from the VCS agent for SQL Server Database Engine
- Messages from the VCS agent for SQL Server FILESTREAM
- Messages from the VCS agent for SQL Server Agent service and Analysis service
- SQL Server Analysis service (MSOLAP) service fails to come online with "invalid context of address" error
- Messages from the VCS agent for MSDTC
- Appendix B. Using the virtual MMC viewer
- Appendix A. Troubleshooting
Typical SQL Server disaster recovery cluster configuration
A Disaster Recovery (DR) configuration enables you to restore application data and services in the event of a catastrophic failure. A typical DR solution requires primary and secondary sites, and clusters within those sites. The clusters at the primary and secondary sites are a part of the global cluster. The cluster at the primary site provides data and services during normal operation, and the cluster at the secondary site provides data and services if the primary site fails. VCS continuously monitors and communicates events between clusters. Inter-cluster communication ensures that the global cluster is aware of the state of the global service group at all times.
The illustration displays an environment with a DR solution that is prepared for a disaster. The primary site consists of two nodes, System1 and System2. The secondary site consists of two nodes, System3 and System4. Each site has a clustered setup with the nodes set up appropriately for failover within the site.
Note:
The figure depicts a typical configuration. The number of systems at the primary and secondary site clusters need not be the same.
Data is replicated from the primary site to the secondary site. Replication between the storage is set up using a replication software. In case of a NetApp environment, replication between the filers at the primary and secondary sites is set up using NetApp SnapMirror for SQL. If the Microsoft SQL Server server on System1 fails, SQL Server comes online on node System2 and begins servicing requests. From the user's perspective there might be a small delay as the backup node comes online, but the interruption in effective service is minimal.
When a failure occurs, such as an earthquake that destroys the data center in which the primary site resides, the DR solution is activated. VCS fails over the entire service group to the cluster at the secondary site. System3 at the secondary site takes over, and the data that was replicated to the secondary site is used to restore the application services to clients.