InfoScale™ 9.0 Storage Foundation and High Availability Solutions HA and DR Solutions Guide for Microsoft SQL Server - Windows
- Section I. Getting started with Storage Foundation and High Availability Solutions for SQL Server
- Introducing SFW HA and the VCS agents for SQL Server
- How is application availability achieved in a VMware virtual environment
- How VCS monitors storage components
- Deployment scenarios for SQL Server
- Reviewing the active-passive HA configuration
- Reviewing a standalone SQL Server configuration
- Reviewing the campus cluster configuration
- Reviewing the Replicated Data Cluster configuration
- About setting up a Replicated Data Cluster configuration
- Disaster recovery configuration
- Reviewing the disaster recovery configuration
- Notes and recommendations for cluster and application configuration
- Configuring disk groups and volumes for SQL Server
- About managing disk groups and volumes
- Configuring the cluster using the Cluster Configuration Wizard
- Installing SQL Server
- Completing configuration steps in SQL Server
- Introducing SFW HA and the VCS agents for SQL Server
- Section II. Configuring SQL Server in a physical environment
- Configuring SQL Server for failover
- About configuring the SQL Server service group
- Configuring the service group in a non-shared storage environment
- Configuring an MSDTC Server service group
- Configuring campus clusters for SQL Server
- Configuring Replicated Data Clusters for SQL Server
- Setting up the Replicated Data Sets (RDS)
- Configuring a RVG service group for replication
- Configuring the resources in the RVG service group for RDC replication
- Configuring the VMDg or VMNSDg resources for the disk groups
- Configuring the RVG Primary resources
- Adding the nodes from the secondary zone to the RDC
- Verifying the RDC configuration
- Configuring disaster recovery for SQL Server
- Setting up your replication environment
- About configuring disaster recovery with the DR wizard
- Configuring replication and global clustering
- Configuring the global cluster option for wide-area failover
- Testing fault readiness by running a fire drill
- About the Fire Drill Wizard
- Prerequisites for a fire drill
- Preparing the fire drill configuration
- Deleting the fire drill configuration
- Configuring SQL Server for failover
Reviewing the disaster recovery configuration
You may be preparing to configure both a primary site and a secondary site for disaster recovery.
The following figure illustrates a typical Active-Passive disaster recovery configuration using Volume Replicator (Volume Replicator).
In the example illustration, the primary site consists of two nodes, SYSTEM1 and SYSTEM2. Similarly the secondary setup consists of two nodes, SYSTEM3 and SYSTEM4. Each site has a clustered setup with the nodes set up appropriately for failover within the site. The cluster on the primary site has a shared disk group that is used to create the volumes required by Volume Replicator for setting up the Replicated Volume Group (RVG). The Microsoft SQL Server application data is stored on the volumes that are under the control of the RVG.
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. If there is a disaster at the primary site, SYSTEM3 at the secondary site takes over.
You can choose to configure replication using Volume Replicator or an agent-supported array-based hardware replication. You can use the DR wizard to configure Volume Replicator replication or required options for the VCS agents for EMC SRDF or Hitachi TrueCopy. To use the wizard with any other agent-supported array-based replication, you must complete configuring global clustering with the wizard before configuring replication on the array.