Support for Asymmetric LUN Mapping (ALM) in Windows clusters

SnapCenter Plug-in for Microsoft SQL Server supports discovery in SQL Server 2012 and later, ALM configurations for high availability, and availability groups for disaster recovery. When discovering resources, SnapCenter discovers databases on local hosts and on remote hosts in ALM configurations.

An ALM configuration is a single Windows server failover cluster that contains one or more nodes in a primary data center and one or more nodes in a disaster recovery center.

The following illustration for SQL Server shows two failover cluster instances, one in the primary data center and another in the disaster recovery data center. Each failover cluster instance has two nodes and its own shared storage. All four nodes are part of the same Windows server failover cluster, which is a requirement for availability groups.



Note: LUN level backup, restore, or clone operations on the ALM LUNs are not supported because SnapCenter does not support provisioning in ALM configurations.