# Guidelines for OneDrive for Business Access Nodes

Verify that the access nodes for OneDrive for Business meet the guidelines. Access nodes run backups and other operations.

Note

For high availability (which is recommended for the first full backup), use 2 or more access nodes and a maximum of 5 Azure apps.

Environment | Small | Medium
--- | --- | ---
Users | 4,000 | 8,000
Data backed up each day | 500 GB | 1 TB
Guidelines |  |
Access nodes | Normal availability: 1 High availability: 2 or more | Normal availability: 1 High availability: 2 or more
CPU or vCPU for the access nodes | 4 cores | 8 cores
RAM for the access nodes | 8 GB | 16 GB
Streams per access node Important The number of streams must always be greater than the number of Azure apps in your environment. | 10 | 20
Azure apps | 5 | 5

## Assumptions

The guidelines are based on the following assumption:

- The average user account size is 10 GB.

## Job Results Folder Size

With an average user account size of 10 GB, and a backup job running in 10 streams, the job results folder can grow to a maximum of 500 GB.

With n number of parallel backup jobs running, the job results folder can grow to a size of n*500 GB.

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