Increase Ceph Min Size - sufficient free space?

[petemcdonnell]

Hello!

We have a 3-node PVE 7.2-4 cluster using Ceph 16.2.7. The cluster has been around for several years and we've completed most of the upgrades we want on it. We had been short on disk space for a long time, but recently added additional disk space. Unfortunately, when ceph was configured, the min_size was set to 1. We very much want to resolve this, but want to ensure we have sufficient free space.
How can we confirm this?



Any information is appreciated. Thanks!

Have a great day.

 

[gurubert]

Your pool size is already 3. The min_size is just a safety setting. Upping it to two will not change the number of replicas.

 

[petemcdonnell]

Thanks!
So setting it to 2 will not use any additional space?

 

[gurubert]

Yes