CEPH on LVM ?

[tytanick]

Hi.
My proxmox version is newest 4.2
Is it possible to create ceph with three/four nodes on local-lvm volume ?
Problem is that i dont have second phisical disk like /dev/sdb for usage (because of stupid raid controller which cant make two separate logical disks)
So question is is it possible to create Ceph on LVM volume and HOW ?
Or how can i do this in any other way if i have 1 physical disk on each node ?
thx for help

 

[dietmar]

So question is is it possible to create Ceph on LVM volume and HOW ?

No, because that makes no sense. You need several OSDs (disks) one one node to get reasonable performances.

 

[tytanick]

so should i use drbd instead on those 4 nodes to have shared storage ? or do something else ?
Each node has 2x250 GB SSD in hardware raid seen by system as one disk.

 

[tytanick]

And how can i use /dev/pve/data lvm for drbd ?