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How to Optimize Backup Performance in Multi-Tenant Environments

KB ID: 4217
Product: Veeam Backup & Replication | 10 | 11 | 12
Published: 2021-10-04
Last Modified: 2023-04-21
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Purpose

This article documents how to alter the performance characteristics of backup jobs created in the Veeam self-service backup portal (for VMware Cloud Director and vSphere) and jobs pointed to the Veeam Cloud Connect repository.

Cause

In a multi-tenant environment, one of the most important goals a Service Provider has is to ensure the availability of the resources to all users serviced by the environment while working to mitigate the “noisy neighbor” or “one-tenant-takes-it-over” issues. Based on this principle, the backup jobs created in Veeam Self-Service Portal and Veeam Cloud Connect are by default given an equal opportunity to process data within set allocation windows. This technique helps Service Providers reduce and ultimately eliminate the impact of backup data processing on the underlying infrastructure and other Tenants. In some scenarios, the Service Provider may choose to temporarily remove this restriction to improve the processing speed of the backups.

Solution

Veeam Backup & Replication 12 Improvement
Starting with Veeam Backup & Replication 12, the default value of this setting is 2, or "hybrid."

To improve processing speed for the backup jobs created in Multi-Tenant environments, the Service Provider can switch to the “Hybrid” (recommended) or ”Dynamic” modes of quota allocation.

After altering quota allocation mode in an environment, closely monitor backup infrastructure resources consumption.

 

This registry value is created on each Veeam Backup & Replication server managed by the Enterprise Manager server (providing the Self-Service Portal) or Veeam Cloud Connect server itself.

Key Location: HKLM\SOFTWARE\Veeam\Veeam Backup and Replication
Value Name: CloudConnectQuotaAllocationMode
Value Type: DWORD (32-Bit) Value
Value Data (Default*): 0
Acceptable Values: 0 | 1 | 2

*0 is the default value for Veeam Backup & Replication versions 10, 10a, 11, and 11a. Starting with Veeam Backup & Replication 12, the new default is 2.

No service restart is needed. The registry value will affect all new tasks that are started after its creation.

0 – Default

For Veeam Cloud Connect jobs, each IO stream for backup file write operations is limited to a maximum of 512MB of data every 15 seconds. For Cloud Director backup jobs that are configured from the vCD self-service portal, the limit is 512MB every 10 seconds.
This approach ensures that every write operation has an equal opportunity to access the storage, especially when slower storage is used.

1 – Dynamic

The Target Data Mover responsible for the data processing requests the quota allocation based on the availability of the current resources combined with the resources needed to process the data sets more efficiently.

Note: High demand for the processing resources may result in a performance impact in slower infrastructure environments. Performance monitoring is advised.

2 - Hybrid (Recommended) — Default for Veeam Backup & Replication 12+

Defaults to the Dynamic quota allocation and resorts to the Default quota allocation as needed.

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