2 May
2023
2 May
'23
1:01 a.m.
Thank you for the clarification.
On Mon, May 1, 2023, 20:11 Wesley Dillingham <wes(a)wesdillingham.com> wrote:
Assuming size=3 and min_size=2 It will run degraded
(read/write capable)
until a third host becomes available at which point it will backfill the
third copy on the third host. It will be unable to create the third copy of
data if no third host exists. If an additional host is lost the data will
become inactive+degraded (below min_size) and will be unavailable for use.
Though data will not be lost assuming no further failures beyond the 2 full
hosts occurs and again if the second and third host comes back the data
will recover. Always best to have an additional host beyond the size
setting for this reason.
Respectfully,
*Wes Dillingham*
wes(a)wesdillingham.com
LinkedIn <http://www.linkedin.com/in/wesleydillingham>
On Mon, May 1, 2023 at 11:34 AM wodel youchi <wodel.youchi(a)gmail.com>
wrote:
Hi,
When creating a ceph cluster, a failover domain is created, and by default
it uses host as a minimal domain, that domain can be modified to chassis,
or rack, ...etc.
My question is :
Suppose I have three osd nodes, my replication is 3 and my failover domain
is host, which means that each copy of data is stored on a different node.
What happens when one node crashes, does Ceph use the remaining free space
on the other two to create the third copy, or the ceph cluster will run in
degraded mode, like a RAID5
which lost a disk.
Regards.
_______________________________________________
ceph-users mailing list -- ceph-users(a)ceph.io
To unsubscribe send an email to ceph-users-leave(a)ceph.io