# Many concurrent connections=denial of service?

**URL:** <https://kopia.discourse.group/t/many-concurrent-connections-denial-of-service/2370>\
**Category:** General\
**Created:** [October 22, 2023, 11:46am UTC](https://kopia.discourse.group/t/many-concurrent-connections-denial-of-service/2370 "2023-10-22T11:46:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lsd382](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/lsd382/32/815_2.png) [@lsd382](https://kopia.discourse.group/u/lsd382)\
**Post date:** [October 22, 2023, 11:46am UTC](https://kopia.discourse.group/t/many-concurrent-connections-denial-of-service/2370/1 "2023-10-22T11:46:40Z")

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Hello!

I plan to use Kopia for backing up multiple user windows workstations, about 300 PCs.  
Backing up is scheduled by windows task scheduler to run after user logon to system.  
So, in the morning we will have more than 100 users trying to backup simultaneously.  
What will happens if the server is overloaded? Will copia client wait for free slot? Or just fail?

Sever hardware is 2x Xeon e5-2690, totally 40 cores, 64gb of RAM  
paraller snapshots are set to --max-parallel-snapshots=200

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**Author:** ![saviodsouza](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/saviodsouza/32/50_2.png) [@saviodsouza](https://kopia.discourse.group/u/saviodsouza)\
**Post date:** [November 23, 2023, 3:55pm UTC](https://kopia.discourse.group/t/many-concurrent-connections-denial-of-service/2370/2 "2023-11-23T15:55:52Z")

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Read this…

> [@Maximum usable size of the repository? Petabyte scale possible?](https://kopia.discourse.group/t/maximum-usable-size-of-the-repository-petabyte-scale-possible/1674):
>
> We are looking for a backup software allowing to easily push various assorted pieces of data to a central repository for archiving / disaster recovery scenario. The data lives in different places, some of this stuff is on local disks, but we also got a bunch storage platforms (accessible over NFS), as well as things like Gluster, Ceph etc. - and all of these have got some sort of replication / snapshotting / DR plan in place, the idea here is to archive important data to an offsite system, to h…