Auxiliary backup applications

[Pagrossman]

Hi,

I didn't create any ticket for this, because I have only the question.

We have Veeam Backup for MS Office 365 16C/16GB + 500mbps/500mbps internet connectivity.
We have struggling with the speed of object storage for a long time. We wanted to use auxiliary backup applications (we use modern only authentication), but it seems that auxiliary backup applications don't have any effect on backup speed.
Could somebody to explain how the backup applications work?
We tried to create 5 backup applications without effect, then we increased the number of backup applications to 10 and then to 30... and still without effect... absolutely...

This is backup job with 30 auxiliary backup applications:


And this with zero auxiliary backup applications (the backup time is absolutely same):


*** You can ignore the warning "site is already processed by another job". For this we have created service ticket, because it is false information. (Case #05105004 and Case #05076912)

I tried to check the Veeam logs and all backup applications are instantly throttled...


So the question...
How the backup applications work and how we can increase the backup speed with these auxiliary backup applications?

Thank you,
Jan

[Mildur]

Have a look at this topic. It's about low speed in doing backups of sharepoint sites.

veeam-backup-for-office-365-f47/sharepo ... 76813.html

[Polina]

Hi Jan,

Additional apps can increase the speed only by mitigating the throttling effect. When requests are throttled for one app, another 'cold' app takes the job without the need to wait. If no throttling occurs, the speed of backup doesn't change.

[karlochacon]

hi guys I have this case but the support guy just told me this the initial Application is needed but he never told me what is the recommendation?

Like 1 App for every 50 users? how do I know how many Apps to add and If I already have 10 how do I calculate If I need 10 more?


is there a relation for this? or just 100 which i the top that can be added in the wizard?

Case # 05123785

thanks

[Mildur]

Backup accounts and backup apps are only used for Onedrive and Sharepoint.
One of my environments is using a sharepoint site with 800000 items (1TB). We had to deploy 15-20 Backup user until the backup was successfull without any throttling.
It‘s difficult to calculate before running a job. I don‘t think microsoft will tell you, „you need a second account after 100GB Data“. Each day it could be at a different state of the backup, when you face the throttling issue.

I recommend to start with 8-32 backup accounts/apps depending on how much items/dats you want to backup. In my linked topic, Alex was using 32-128 backup accounts until it was working in an acceptable speed for him.

[Polina]

Throttling limits vary for different tenants depending on their size/number of users, and there's no 'golden rule' to calculate the sufficient number of additional backup accounts. It's always a 'test and adjust' way of configuration. As Mildur suggests, start with 8 per proxy processing SharePoint/OneDrive items and add more if throttling still slows down your backup.