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May 30th, 2013 06:00

Throttle Avamar Backups


I have a customer wanting to know if we can throttle the bandwidth that a avamr client uses, when backing up. This client is in a remote location across a slow WAN link. They're concerned with saturating the bandwidth.

2K Posts

May 30th, 2013 07:00

Bandwidth can be throttled on a per-client basis using the "net-throttle" avtar parameter. For file system backups, you can add it to the dataset, e.g. to limit the average bandwidth the client will use to 0.5 megabits:

Attribute: net-throttle

Attribute Value: 0.5

For plug-in backups (e.g. Exchange, SQL, etc.), you have to specify the flag as a "pass-through" parameter:

Attribute [avtar]net-throttle

Attribute Value: 0.5

If there are only a small number of clients, you can also add the parameter to the avtar.cmd "flag" file which you would create inside the var subdirectory of the Avamar install path on the clients themselves:

--net-throttle=0.5

Avamar doesn't have any facility to manage bandwidth by group so if you have a large number of clients on the other side of the WAN pipe, it's better to handle this type of throttling at the network layer.

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