[PVE-User] Ceph Disk Usage/Storage

Daniel daniel at linux-nerd.de
Wed Dec 14 13:21:42 CET 2016


Ahh ok,

so when i setup 2/1 it means 2 Copies. right?


> Am 14.12.2016 um 13:00 schrieb Wolfgang Link <w.link at proxmox.com>:
> 
> You pool size is 3*400 GB so 1.2GB is correct, but your config say 3/2.
> This means you have 3 copies of every pg(Placement Group) and min 2 pg
> are needed to operate correct.
> 
> This means if you write 1GB you lose 3GB of free storage.
> 
> 
> On 12/14/2016 12:14 PM, Daniel wrote:
>> Hi there,
>> 
>> i created a Ceph File-System with 3x 400GB
>> In my config i said 3/2 that means that one of that disks are only for an faulty issue (like raid5)
>> 3 HDDs Max and 2 HDDs Minimum
>> 
>> In my System-Overview u see that i have 1.2TB Free-Space which cant be correct.
>> 
>> This is what the CLI command shows me:
>> 
>> POOLS:
>>    NAME     ID     USED     %USED     MAX AVAIL     OBJECTS 
>>    ceph     2         0         0          441G           0 
>> 
>> But as i understand it correctly max Avail GB must be round about 800GB
>> 
>> Cheers
>> 
>> Daniel
>> 
>> 
>> 
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> 
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