I create a large data drive out of a bunch of small SSDs using RAID and
make that RAID drive an LVM PV.
I can then create LVM volume groups and volumes for each use (in my case
virtual drives for KVM) to back specific DRBD resources for each VM. It
allows me to have a DRBD resource for each VM, each backed by an LVM
volume which is in turn on a large LVM PV.
VM has DRBD resource as it's block device --> DRBD resources backed by
LVM volume --> LVM volume on a large RAID based Physical Volume.
I can resize resources to my heart's content. :-)
*Paul O'Rorke*
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On 2018-05-01 07:38 AM, Yannis Milios wrote:
I would prefer the 2nd option. Ideally all disks would be members of a
RAID(10?) array, with DRBD sitting on top for the replication, and
LVM for managing the volume.
Another option would be ZFS managing the disks and the volume, while
DRBD sitting on top for the replication. This very same scenario would
also apply for LVM (thin or thick).
There's no right or wrong, depends on what your needs are.
I would avoid having single points of failure though, like single
drives in any case...
On Tue, May 1, 2018 at 3:12 PM, Gandalf Corvotempesta
<[email protected]
<mailto:[email protected]>> wrote:
Hi to all
Let's assume 3 servers with 12 disks each
Would you create one resource per disk and then manage them with
something like LVM or a single resource from a huge volume over
all disks?
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