Database Reference
In-Depth Information
Tip
For a thorough understanding of Storage DRS, refer to the VMware white paper
“Understanding VMware vSphere 5.1 Storage DRS”
( http://www.vmware.com/files/pdf/vmw-vsphr-5-1-stor-drs-uslet-101-web.pdf ) .
The sample diagram in Figure 6.36 shows multiple SQL Server VMs entirely within a
single data store cluster, which would be backed by a single class of storage or single
physical storage policy. Each VM's individual VMDKs would be split among the data
stores of the data store cluster. Storage Policies on each VM would dictate which data
store cluster the SQL Server is assigned, but an individual VM is not split between
multiple data store clusters, as was the case in Figure 6.35 . This is the recommended
approach in environments that support automated block tiering at the storage array.
Figure 6.36 Multiple SQL Servers—single vSphere storage cluster.
This design ensures simplified management and operations while ensuring the
appropriate performance of the group of SQL Servers. It is also compatible with IaaS
environments and use with Cloud environments, such as VMware vCloud Automation
Center and VMware vCloud Director. You may still support multiple storage policies
and service levels for the storage, each being a different data store cluster. But the VMs
that map to those policies would be entirely contained within the relevant data store
cluster.
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