[PVE-User] Ceph - Better understanings

Brian :: bc at iptel.co
Fri May 27 22:49:06 CEST 2016

Its pretty straight forward. If you have 6TB and you are using size =
3 in ceph - you have 2TB (give or take) of usable storage.

On Fri, May 27, 2016 at 9:27 PM, Daniel Eschner <daniel at linux-nerd.de> wrote:
> Hi all,
> i am playing with Ceph and some thinks i dont understand.
> The Proxmox docu tells how to setup easily - everthinks is working.
> But i want to understand how the Recplication and Redundancy works.
> I Setup 3 SSD OSDs ans created a Pool with Size 3 and Mn Size 2
> Proxmox tells me the available disk size is 1200GB (3x 400GB SSDs)
> How can that redundant when when i use 1TB storage?
> I see used 6GB  but when i see the Ceph Storage it tells me used 18GB - Thats means replicated on all SSDs.
> But usebale is 1,2TB - dont understand how can that be - its impossible for my understanding
> I didnt find any good explanation in the web :-(
> https://www.dropbox.com/s/jhzjq7773n0wn5t/Screenshot%202016-05-27%2022.18.47.png?dl=0
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