How can i limit the number of versions for samba modul shadow_copy2

UCS - Univention Corporate Server
1

Hello all,

we use here UCS version 5.0-6 and sambashares on BTRFS. Now we enabled shadowcopy on the server for us Windows Clients. This is working, but i did not find how i can limit the number of versions of the snapshots.

Does anyone know how this will be configured?

Thanks
best regards
boospy

2

What do you to expect to happen when the limit is reached? No additional can be created? I guess probably not, maybe you want the new copy to happen and then a cleanup job should remove the oldest? In that case a cron job would be one way.

3

The problem is there is no limit, at least I can’t find a way to configure it in Samba. The Samba documentation doesn’t mention it either. The snapshots already went into the millions and had a virtual size of over 1.5PB. Deleting them was a pain.

4

mybe that help’s - i don’t use shadow copys at all - so not tested that

https://wiki.samba.org/index.php/Rotating_LVM_snapshots_for_shadow_copy

rg
Christian

5

It’s more complex than you might think…
I have now found this file:

/usr/lib/univention-directory-listener/system/samba-shares-btrfs.py

Does anyone know this? Has a UCS header. But I can’t find or reproduce it on any other system.