vCenter Chargeback Scaling
Configure additional installations of vCenter Chargeback server to connect with the built-in load balancer that is included in the first instance.
The load balancer spreads load from requests across multiple vCenter Chargeback servers.

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DataCollectors:
Multiple instances can be installed and configured separately. First instance is installed with vCenter Chargeback server (option selected).
Multiple data collectors can populate a single vCenter Chargeback database. The load is evenly distributed if multiple data collectors are enabled.
vCenter Chargeback virtual machines can be deployed as a two-node, load-balanced cluster. Multiple vCenter Chargeback data collectors can be deployed remotely to avoid a single point of failure.
These deployments have no effect on infrastructure availability or customer virtual machines. Configuring vCenter Chargeback servers in a cluster configuration ensures that providers can accurately produce customer billing information and usage reports. Configuring vCenter Chargeback in a cluster configuration is not required for maintaining workload accessibility.