So my pools has 5 nodes with 12 osds each of 8tb.

Currently I am trying to create an erasure coded pool of k=8 m=2, however after adding this profile and create an ecpool with this profile the pools is always stuck on creating+incomplete.

If I create anything that is less than 6 disks in any combination of k+m = 6 then it the pool is created successfully and pgs enter an active+clean state.

But anthing more than 6 disks and the pool is forever stuck in creating+incomplete state.

I have been scratching my head over this for the past two days and since I couldn't find any thing anywhere in the documentation, I have come here to find some help with this.

Can anyone assist me on where I could be going wrong?

I am using ceph mimic 13.2.4 (latest stable) on centos 7


If you use failure domain "host", then it is in fact impossible to set up the pool with fewer than k+m hosts. You can change your crush rules to use a failure domain of OSD (disk) instead. Then your pool will initialize properly. But you will lose availability whenever a host is down. This is a classical trade-off.

  • Hi, I am using osd as the failure domain. – Vish Jan 14 at 3:23
  • I have add a look at the crush rules and it looks good as well. – Vish Jan 14 at 3:24
  • Can you tell me how can I choose if I wanted to at max 2 osds from the same host.... This would mean that if a single node goes down, it can't take down any bits of data as atleast 8 shards (2 shards per the remaining 4 nodes) will keep a full copy readable. – Vish Jan 14 at 3:26

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.