How do you put Ceph DB and WAL on the same device?

victorhooi

Well-Known Member
Apr 3, 2018
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Hi,

I'm trying to setup a new Proxmox/Ceph cluster, using Intel S3610 SSDs for the OSDs, and Intel Optane 905P's for the WAL/DB disk.

I'm using the commands from the documentation here.

However, if I try to put both the the DB and WAL on the Optane disk, I get the following error:

Code:
# pveceph osd create /dev/sda -db_dev /dev/nvme0n1 -wal_dev /dev/nvme0n1
400 Parameter verification failed.
wal_dev: cannot chose '/dev/nvme0n1' for more than one type.
pveceph osd create <dev> [OPTIONS]

Is there any way to put it on the same device?

Thanks,
Victor
 
There is no need to specify the WAL separately. The WAL lives with the DB by default.
 
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