> Commvault Cloud > Backup Gateways > On-Premises Backup Gateways

System Requirements for On-Premises Backup Gateways

Verify that your environment meets the system requirements for an on-premises Commvault Cloud backup gateway.

Operating System

  • Microsoft Windows Server 2025 Editions

  • Microsoft Windows Server 2022 Editions

  • Microsoft Windows Server 2019 Editions

  • Microsoft Windows Server 2016 Editions

  • Oracle Enterprise Linux 8.7 (bundled in VMware OVA)

Hardware

You can install the Commvault Cloud backup gateway on a virtual machine or a physical server in an on-premises datacenter. To reduce network latencies and performance degradation, place the Commvault Cloud backup gateway adjacent to the data source.

The following hardware sizing guidelines are for the initial deployment of the Commvault Cloud backup gateway.

Note

Component

Size

Back-end storage size (BET)1

Up to 50 TB

Note

For environments larger than 50 TB of data, see the knowledgebase article "Commvault Cloud Backup Gateway Sizing Guidelines for On-Premises Environments" for guidelines.

CPU

2 vCPUs

RAM

16 GB

Operating system disk

(SSD recommended)

50 GB

Dedicated SSD data disk

This is the disk where you will install the backup gateway software.

The data disk is used for program files, deduplication, indexing, and logs.

200 GB (minimum)

Increase the size of this disk as you reach usage thresholds.

Network bandwidth

1 Gbps (minimum)

Footnotes:

  1. Back-end storage size (BET) requirements approximately range from 1.0–1.6 times of the front-end data size (FET). This factor will vary directly in proportion with the amount of retention required and the amount of daily change rate for the front-end data. For example, if the data is retained for lower number of days, then it reduces the predicted amount of back-end storage requirement. Whereas, if the extended retention rules are applied to a larger portion of the managed data, then it can increase the back-end storage consumption. The FET estimate can be used in the storage policy design to help size the appropriate resources to support the use-case.

    The following are examples of commonly used settings for the backup retention.

    Example 1:

    • 80% VM/File data

    • 20% Database data

    • Daily change rate 2%

    • Compression rate 50%

    • Daily backups are retained for 30 days

    Factoring in these parameters, the back-end storage size requirements can range from 1.0 - 1.2 times the front-end data size.

    Example 2:

    • 80% VM/File data

    • 20% Database data

    • Daily change rate 2%

    • Compression rate 50%

    • Daily backups are retained for 30 days

    • 8 weekly backups are retained for 1 year

    • 9 monthly backups are retained for 1 year

    • 1 yearly backup is retained

    Factoring in these parameters, the back-end storage size requirements can range from 1.4 - 1.6 times the front-end data size.

  2. Please contact your software vendor for assistance with more advanced design cases.

Network

The on-premises Commvault Cloud backup gateway must be able to connect to the Commvault Cloud backup service and must be able to access the servers that need to be backed up:

  • TCP 443 outbound must be open to access the following:

    • Commvault Cloud backup service (*.metallic.io)

    • Commvault Cloud storage (*.blob.core.windows.net)

    • Azure services (*.cloudapp.azure.com)

    • If applicable, your storage location in AWS (*.s3.amazonaws.com)

  • TCP 8400 and TCP 8403 must be open between the backup gateway and any on-prem data sources that you want to protect. Depending on the operation, either the client or the backup gateway can open a connection.

  • To back up on-prem VMware servers, the backup gateway must be able to access the VMware environment and components:

    • vSphere vCenter server: Port for web service (default: 443) must be opened. If vCenter is configured to use non-default ports, the non-default ports must also be opened.

    • vSphere ESX server: Ports for web service (default: 443) and TCP/IP (default: 902) must be opened for the vStorage APIs for data protection.

    Note

    If you use VMware Cloud on AWS (VMC) or Azure VMware Solution (AVS), there are no port requirements for the ESXi hosts.

  • To back up Hyper-V virtual machines (VMs), the Commvault Cloud VM proxy must be able to access the backup gateway on the port for the web service (default: 443).

  • Tenant computers must be able to connect to the following URLs (all URLs support HTTPS and can be accessed on port 443):

    • cloud.commvault.com (download software to install, update, or upgrade client computers)

    • downloadcenter.commvault.com (download software to install, update, or upgrade client computers)

    • https://time.akamai.com (fetch Akamai server time to generate Akamai token)

    • *.mapbox.com (provide location of the client or laptop, and fetches data such as city name)

    • *.skyhookwireless.com (provide location of the client or laptop, and fetches data such as city name)

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