---
name: vmware-service-vcda-adding-capacity
title: Adding capacity to single-tenant Cloud Director sites with VCDA
description: '{{site.data.content.vms-deprecated-note}}'
last-updated: 2025-10-30
---

> ## Documentation Index
> The table of contents for this documentation set is at https://cloud.ibm.com/docs/vmware-service?format=markdown
> The index for all IBM Cloud docs is at: https://cloud.ibm.com/docs/llms.txt
> Use these files to discover more information as needed.

# Adding capacity to single-tenant Cloud Director sites with VCDA
{: #vcda-capacity-adding}

{{site.data.content.vms-deprecated-note}}

After your IBM Cloud for VMware Cloud Foundation as a Service Cloud Director site instance order is complete, use VMware Cloud Director Availability (VCDA) to configure your instance capacity. Determine the amount of capacity based on how many virtual machines (VMs) you plan to migrate or protect.

Select from the following estimated capacity resource options that are required for your resource pool to migrate or protect your VMs. Each resource is per instance.

VCDA resources can include the VCDA Manager VM, Tunnel VM, and Replicator VMs. Resources are deployed into the workload resource pool and use RAM and CPU from the resource pools in each zone for the site.

When you select and apply a resource configuration, you can upgrade only to a greater configuration.
{: important}

| Number of VMs | Number of replicators per instance | RAM per instance | CPU per instance |
|:--------- |:------- |:--------- |:------- |
| 0 - 750 | 1 | 16 GB | 14 vCPU |
| 750 - 1500 | 2 | 24 GB | 22 vCPU |
| 1500 - 5000 | 6 | 56 GB | 54 vCPU |
| 5000 - 10000 | 12 | 104 GB| 102 vCPU |
{: caption="Options for estimated migration or replication capacity" caption-side="bottom"}

## Procedure to configure your VMware Cloud Director instance capacity
{: #vcda-capacity-adding-proc}

Use the **Migration and protection estimated capacity** section for both migration and protection destination configurations.
{: note}

1. In the VMware Solutions console, click **Resources > VCF as a Service** from the left navigation panel.
2. On the **VMware Cloud Foundation as a Service** page, click the single-tenant Cloud Director site name.
3. Click the **Add-on services** tab, then expand the **VMware Cloud Director Availability** service.
4. In the **Migration and protection estimated capacity** section, click **Edit capacity**.
5. Select a resource configuration.
6. Click **Apply**.

## Related links
{: #vcda-capacity-adding-links}

* [Migrating workloads to VCF as a Service with VCDA](https://cloud.ibm.com/docs/vmware-service?topic=vmware-service-tenant-vcda&format=markdown)
* [Protecting workload data in VCF as a Service with VCDA](https://cloud.ibm.com/docs/vmware-service?topic=vmware-service-tenant-vcda&format=markdown)
* [Viewing and deleting VCF as a Service Cloud Director sites](https://cloud.ibm.com/docs/vmware-service?topic=vmware-service-tenant-viewing-sites&format=markdown)
* [Adding and deleting VCDA](https://cloud.ibm.com/docs/vmware-service?topic=vmware-service-vcda-adding-deleting&format=markdown)