Re: How many nodes/OSD can fail

[Willi Fehler <willi.fehler@xxxxxxxxxxx>]

Hello David,

so in a 3 node Cluster how should I set min_size if I want that 2 nodes could fail?

Regards - Willi

Am 28.06.16 um 13:07 schrieb David:

Hi,

This is probably the min_size on your cephfs data and/or metadata pool. I believe the default is 2, if you have less than 2 replicas available I/O will stop. See: http://docs.ceph.com/docs/master/rados/operations/pools/#set-the-number-of-object-replicas

On Tue, Jun 28, 2016 at 10:23 AM, willi.fehler@xxxxxxxxxxx <willi.fehler@xxxxxxxxxxx> wrote:

Hello,

I'm still very new to Ceph. I've created a small test Cluster.

 

ceph-node1

osd0

osd1

osd2

ceph-node2

osd3

osd4

osd5

ceph-node3

osd6

osd7

osd8

 

My pool for CephFS has a replication count of 3. I've powered of 2 nodes(6 OSDs went down) and my cluster status became critical and my ceph clients(cephfs) run into a timeout. My data(I had only one file on my pool) was still on one of the active OSDs. Is this the expected behaviour that the Cluster status became critical and my Clients run into a timeout?

 

Many thanks for your feedback.

 

Regards - Willi

 



_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com