Remove Zfs Snapshot - Best Practise

[yena]

Hello,
what is the best practice to remove old zfs snapshot ?
Can i remove only strating from newer or can i start olso from older ?
Can i remove a random snapshot without corrupt others ?
Can i remove all VM snapshot using one commant line ?

Thanks!

 

[fireon]

Hello,
what is the best practice to remove old zfs snapshot ?
Can i remove only strating from newer or can i start olso from older ?

No matter.

Can i remove a random snapshot without corrupt others ?

Please explain briefly.

Can i remove all VM snapshot using one commant line ?

Yes, but not tested:

zfs list -H -o name -t snapshot | xargs -n1 zfs destroy

 

[LnxBil]

Can i remove a random snapshot without corrupt others ?

Yes, a snapshot is (simplified) only a reference to all used blocks, destroying one will only free the space that is only referenced once in this snapshot. Predicting how much space is freed by destroying a snapshot is not as easy as it sounds, it's quite the opposite.

 

[LnxBil]

Oh ... one remark:

If you created the snapshots via the GUI and not directly with zfs snapshot, please use qm delsnapshot for this.

 

[yena]

THANKS!