...
Limit the concurrent tasks against the backup repository if it is overwhelmed
...
...
Handling multi-VBA clients
Note: Veeam recommends the use of VBR managed mode “managed mode” which provides network traffic rules via their backup proxies. add . In this mode, all data protection and administration tasks are performed by a backup administrator in Veeam Backup & Replication.
reference: https://helpcenter.veeam.com link/docs/backup/agents/agents_infrastructure.html?ver=120
If you decide to use the standalone mode then the following simple example HAproxy scenario’s can provide you some level of protection against over-subscribing the object storage target.
Scenario 1: simple max connections
...