CEPH: Pool (min_)size update via GUI

[Belokan]

Hello,

Is there a reason updating an already created pool size or min_size value is not possible through the GUI ?
The GUI instantaneously reflects changes if "ceph osd pool set" commands are ran from a CEPH node CLI, and nothing "critical" is reported in the log.
So why there's no "Edit" button acting as "ceph osd pool set" wrapper available together with Create & Destroy ones ?

Have a nice day,

Olivier

 

[t.lamprecht]

Hi,

not a real reason.
The one thing maybe a little problematic could be that ceph starts immediately to create the additional required replicas, if it got increased - thus resulting in a possible very high load on the ceph/pve cluster.
That with the fact that we thought that this setting won't be often changed after creating a pool, (and nobody asked for it yet) was highly probably the reasoning behind that missing functionality.

Why do you need to change this setting often?

 

[Belokan]

Thanks for the detailed answer Thomas.

I don't have to change it often, but I have created my pool as 3/2 and wanted to change it to 3/1 (infra@home) without having to create a new 3/1 pooll and migrate all disk images. Because of the "lack" of Edit button I did it smoothly using CLI (tested on another pool with a single test VM). So I was just wondering why it was not available directly in the GUI

Cheers