The collector capacity is based on the brick size. The data source that you can add to a collector is depended on the capacity of the collector (VMs and flows).

You can scale up each collector to Extra-Large size. You can add multiple data sources to a collector based on the supported collector capacity. However, you cannot add same data source to multiple collectors.

Scaling up Scenarios for the Collectors

Scenarios Action to perform
2000 VMs in a VMware vCenter Install one medium collector VM. Add the VMware vCenter to this collector.
1000 VMs in VMware vCenter1 and 2000 VMs in VMware vCenter2 (all of them are in one data center)

Install one medium collector VM. Add both VMware vCenters to this collector.

1000 VMs in VMware vCenter1 (data center1) and 2000 VMs in VMware vCenter2 (data center2)

Install one medium collector VM in each data center. Add VMware vCenter1 to a collector VM in same data center and Add VMware vCenter2 to a collector VM in its data center.

VM count exceeds 4000, active flows exceeds 2.5 Million. Convert your collector VM from MEDIUM to LARGE. See Increase the Brick Size of Your Setup.
9,000 VMs in VMware vCenter1 without flows (data center1). Install one large collector VM. Add this VMware vCenter to the collector.
VM count is less than or equal to 10000, but the active flow exceeds 5 million. Convert your collector VM from LARGE to EXTRA-LARGE. See Increase the Brick Size of Your Setup.
Two VMware vCenters, VMware vCenter1 has 10000 VMs and 9 million active flows, and VMware vCenter2 has 10000 VMs and 4 million active flows.

Install one EXTRA-LARGE and one LARGE collcctor. Add VMware vCenter1 to EXTRA-LARGE collector and add VMware vCenter2 to LARGE collector.

One VMware vCenter that runs 10000 VMs and 9 million active flows. Install one EXTRA-LARGE collector and add the VMware vCenter to the collector.

For information on adding a VMware vCenter server, see the Add VMware vCenter Server topic.