Commvault Network Throttle

I’ve been struggling for a while trying to get my configuration set properly to avoid WAN saturation with Commvault. There are two key areas I’ve been focusing on:

1. Aux Copies between media agents
2. Client to Media Agent backups

I wasn’t fully thinking about the conflict between these two goals which was the root of my problem.

MediaAgent_1 and MediaAgent_2 are geographically separate across the WAN, with a 30Mbps effective connectivity.

Client_1 and Client_2 are geographically separate, and back up to MediaAgent_1. Each has a 6Mbps link.

In my previous configuration, I applied absolute Send/Receive throttling on the Media Agents to accomodate the Aux Copy, at 20Mbps limit, and similar throttling on the Client configuration at 3Mbps.

As much as it doesn’t make sense, I believe what was causing the problem is that the MediaAgent was set to receive at 20Mbps which overrode the “send” setting on the Client.

So here’s what I have successfully configured now:

MediaAgent_1: Select MediaAgent_2 as “remote client”, with absolute SEND throttling of 20Mbps

MediaAgent_2: Select MediaAgent_1 as “remote client”, with absolute SEND throttling of 20Mbps

Client_1: Select MediaAgent_1 as “remote client”, with absolute SEND throttling of 3Mbps

Client_2: Select MediaAgent_1 as “remote client”, with absolute SEND throttling of 3Mbps

Now running backups during the day isn’t causing extreme saturation of my WAN links!