Hi,
BTW, is there a way how to achieve redundancy over multiple OSDs in one
box by changing CRUSH map?
Thank you
Jiri
On 20/01/2015 13:37, Jiri Kanicky wrote:
Hi,
Thanks for the reply. That clarifies it. I thought that the redundancy
can be achieved with multiple OSDs (like multiple disks in RAID) in
case you don't have more nodes. Obviously the single point of failure
would be the box.
My current setting is:
osd_pool_default_size = 2
Thank you
Jiri
On 20/01/2015 13:13, Lindsay Mathieson wrote:
You only have one osd node (ceph4). The default replication
requirements for your pools (size = 3) require osd's spread over
three nodes, so the data can be replicate on three different nodes.
That will be why your pgs are degraded.
You need to either add mode osd nodes or reduce your size setting
down to the number of osd nodes you have.
Setting your size to 1 would be a bad idea, there would be no
redundancy in your data at all. Loosing one disk would destroy all
your data.
The command to see you pool size is:
sudo ceph osd pool get <poolname> size
assuming default setup:
ceph osd pool get rbd size
returns: 3
On 20 January 2015 at 10:51, Jiri Kanicky <j...@ganomi.com
<mailto:j...@ganomi.com>> wrote:
Hi,
I just would like to clarify if I should expect degraded PGs with
11 OSD in one node. I am not sure if a setup with 3 MON and 1 OSD
(11 disks) nodes allows me to have healthy cluster.
$ sudo ceph osd pool create test 512
pool 'test' created
$ sudo ceph status
cluster 4e77327a-118d-450d-ab69-455df6458cd4
health HEALTH_WARN 512 pgs degraded; 512 pgs stuck unclean;
512 pgs undersized
monmap e1: 3 mons at
{ceph1=172.16.41.31:6789/0,ceph2=172.16.41.32:6789/0,ceph3=172.16.41.33:6789/0
<http://172.16.41.31:6789/0,ceph2=172.16.41.32:6789/0,ceph3=172.16.41.33:6789/0>},
election epoch 36, quorum 0,1,2 ceph1,ceph2,ceph3
osdmap e190: 11 osds: 11 up, 11 in
pgmap v342: 512 pgs, 1 pools, 0 bytes data, 0 objects
53724 kB used, 9709 GB / 9720 GB avail
512 active+undersized+degraded
$ sudo ceph osd tree
# id weight type name up/down reweight
-1 9.45 root default
-2 9.45 host ceph4
0 0.45 osd.0 up 1
1 0.9 osd.1 up 1
2 0.9 osd.2 up 1
3 0.9 osd.3 up 1
4 0.9 osd.4 up 1
5 0.9 osd.5 up 1
6 0.9 osd.6 up 1
7 0.9 osd.7 up 1
8 0.9 osd.8 up 1
9 0.9 osd.9 up 1
10 0.9 osd.10 up 1
Thank you,
Jiri
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