1. Concurrent snapshots/Backups that is managed in this section:
2. Excessive storage stress that can be limited here:
3. About hyperV you can revies this screenshot and relative register key:
2 registry values under HKLMSOFTWAREVeeamVeeam Backup and Replication key:
MaxVmCountOnHvSoftSnapshot (DWORD)
MaxVmCountOnHvHardSnapshot (DWORD) registry values
about theory you can review these most exhaustive articles:
Introducing Backup I/O Control in Veeam Backup & Replication
https://www.veeam.com/blog/introducing-backup-io-control-in-veeam-backup-replication-v8.html
VEEAM Invests in Faster & More Efficient Data Protection With Backup & Replication 8
https://blog.workinghardinit.work/tag/backup-io-control/
