Isn't this somewhat reliant on the OSD type?
Redhat/Micron/Samsung/Supermicro have all put out white papers backing the idea of 2
copies on NVMe's as safe for production.
From: "Magnus HAGDORN" <Magnus.Hagdorn(a)ed.ac.uk>
Cc: "ceph-users" <ceph-users(a)ceph.io>
Sent: Wednesday, February 3, 2021 4:43:08 AM
Subject: [ceph-users] Re: Worst thing that can happen if I have size= 2
On Wed, 2021-02-03 at 09:39 +0000, Max Krasilnikov wrote:
if a OSD
becomes unavailble (broken disk, rebooting server) then
I/O to the PGs stored on that OSD will block until replication
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
yes, that's correct but then you seriously risk trashing your data
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