[PVE-User] Ceph unterstanding questions
proxmox at elchaka.de
Sun Mar 19 16:49:55 CET 2017
Hi Daniel, i would Not use Size of 2! At least you should use Size 3 and min Size of 2.
Otherwise you will be in Trouble in Case of a serious ceph error.
You can find a lot of discussion in the ceph Mailing List Related to this.
Am 19. März 2017 01:24:33 MEZ schrieb Alwin Antreich <sysadmin-pve at cognitec.com>:
>On 03/18/2017 11:17 PM, Daniel wrote:
>> Hi there,
>> i created a Cephcluster with 6 OSDs. Each OSD has 500GB
>> In Proxmox I created a Pool with Size 2 Min 1.
>> Ceph df shows me I can use round about 1300GB Disk space.
>> Now I wanted to understand what Size and Min means.
>> I think Size means duplicate 2 times – that’s the reason why I can
>use only the half of 2700GB which also means I can break 3 HDDs.
>> But what means Min? I also can’t find anything in the documentation.
>The min 1, is the min_size option of the pool and tells ceph what
>should be the minimal number of replicas to serve I/O.
>ceph mailing list
>> pve-user mailing list
>> pve-user at pve.proxmox.com
>pve-user mailing list
>pve-user at pve.proxmox.com
More information about the pve-user