Just also a bit curious. So it just creates a pv on sda and no 
partitioning done on sda? 


-----Original Message-----
From: Daniel Sung [mailto:[email protected]] 
Sent: dinsdag 10 december 2019 14:40
To: Philip Brown
Cc: ceph-users
Subject: Re: [ceph-users] sharing single SSD across multiple HD based 
OSDs

It just uses LVM to create a bunch of LVs. It doesn't actually create 
separate partitions on the block devices. You can run the command and it 
will give you a preview of what it will do and ask for confirmation. 

On Tue, 10 Dec 2019 at 13:36, Philip Brown <[email protected]> wrote:


        Interesting. What did the partitioning look like?
        
        ----- Original Message -----
        From: "Daniel Sung" <[email protected]>
        To: "Nathan Fish" <[email protected]>
        Cc: "Philip Brown" <[email protected]>, "ceph-users" 
<[email protected]>
        Sent: Tuesday, December 10, 2019 1:21:36 AM
        Subject: Re: [ceph-users] sharing single SSD across multiple HD 
based OSDs
        
        The way I did this was to use:
        
        ceph-volume lvm batch /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde
        /dev/sdf etc
        
        Where you just list all of the block devices you want to use in a 
group. It
        will automatically determine which devices are SSD and then 
automatically
        partition it for you and share it amongst the HDD OSDs.
        



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