Wed, Feb 03, 2021 at 09:29:52AM +0000, Magnus.Hagdorn wrote:
if a OSD becomes unavailble (broken disk, rebooting
server) then all
I/O to the PGs stored on that OSD will block until replication level of
2 is reached again. So, for a highly available cluster you need a
replication level of 3
AFAIK, with min_size 1 it is possible to write even to only active OSD serving
> On Wed, 2021-02-03 at 10:24 +0100, Mario Giammarco wrote:
> > Hello,
> > Imagine this situation:
> > - 3 servers with ceph
> > - a pool with size 2 min 1
> > I know perfectly the size 3 and min 2 is better.
> > I would like to know what is the worst thing that can happen:
> > - a disk breaks and another disk breaks before ceph has reconstructed
> > second replica, ok I lose data
> > - if network goes down and so monitors lose quorum do ceph still
> > write on
> > disks?
> > What else?