When planning the infrastructure requirements, you should consider the following points.
A Capacity Database is a SQL Server database.
A SQL Server instance can hold many databases; however, a Control Center can only work with one Capacity Database.
A Control Center has a finite limit on the number of target systems whose data it can collect and process. Depending on the power and memory available to its host, however, it can support a very large number of targets.
You can distribute your Capacity Databases across any number of SQL Server instances.
Note: Older terms for "Capacity Database" in Syncsort™ Capacity Management are "Capacity Management Information System" (or "CMIS") and "Performance Database" (or "PDB"). For this release, "Capacity Database" also refers to any references in the product to "CMIS" and "PDB".