When attempting to perform mass recovery using Instant Recovery to Azure, the restore fails with the following error messages, which may be found within the UI and logs:
Specific error messages:
TooManyPendingCreatAccountOperations
TooManyRequests
Generic error messages:
The request failed due to an internal error
The request wasn't completed in time. Cannot validate argument on parameter 'parameter_name'. The argument is null", If the restore was started using PowerShell cmdlets
When this occurs, the restore settings and Veeam Backup & Replication configuration must be adjusted for mass recovery.
The following factors may cause a mass restore to fail:
Start preparations for mass restore by checking the latest version of these documents:
Each restore workload starts a separate veeam.backup.manager process on the backup server. Each process requires up to 500 MB of RAM and additional CPU resources. (50 restores running in parallel can consume up to 25 GB of RAM.)
It is generally recommended to assign 16 CPUs and 48 GB of RAM to the backup server for 50 simultaneous restores.
To reduce the number of Azure resources created during each restore, select existing resources whenever possible. This helps prevent Azure API throttling, which may cause restore failures.
Avoid creating temporary storage accounts during restore, as the rate at which storage accounts can be created is additionally limited.
Each restore workload requires a temporary helper appliance VM, which runs until the restored workload completes the switchover phase and becomes a regular Azure VM.
Each helper appliance requires:
Ensure that the target Azure subscription's CPU quotas are sufficient for both:
Ensure that the selected subnets have enough available IP addresses in the:
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