Dear All,
Please forgive this post if it's naive, I'm trying to familiarise myself
with cephfs!
I'm using Scientific Linux 6.6. with Ceph 0.87.1
My first steps with cephfs using a replicated pool worked OK.
Now trying now to test cephfs via a replicated caching tier on top of an
erasure pool. I've created an erasure pool, cannot put it under the
existing replicated pool.
My thoughts were to delete the existing cephfs, and start again, however
I cannot delete the existing cephfs:
errors are as follows:
[root@ceph1 ~]# ceph fs rm cephfs2
Error EINVAL: all MDS daemons must be inactive before removing filesystem
I've tried killing the ceph-mds process, but this does not prevent the
above error.
I've also tried this, which also errors:
[root@ceph1 ~]# ceph mds stop 0
Error EBUSY: must decrease max_mds or else MDS will immediately reactivate
This also fail...
[root@ceph1 ~]# ceph-deploy mds destroy
[ceph_deploy.conf][DEBUG ] found configuration file at:
/root/.cephdeploy.conf
[ceph_deploy.cli][INFO ] Invoked (1.5.21): /usr/bin/ceph-deploy mds destroy
[ceph_deploy.mds][ERROR ] subcommand destroy not implemented
Am I doing the right thing in trying to wipe the original cephfs config
before attempting to use an erasure cold tier? Or can I just redefine
the cephfs?
many thanks,
Jake Grimmett
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