Hi,
I meet a trouble on mount the cephfs after doing some disaster recovery introducing by official document(http://docs.ceph.com/docs/master/cephfs/disaster-recovery).
Now when I try to mount the cephfs, I get "mount error 5 = Input/output error".
When run "ceph -s" on clusters, it print like this:
cluster 15935dde-1d19-486e-9e1c-67414f9927f6
health HEALTH_OK
monmap e1: 4 mons at {HK-IDC1-10-1-72-151=172.17.17.151:6789/0,HK-IDC1-10-1-72-152=172.17.17.152:6789/0,HK-IDC1-10-1-72-153=172.17.17.153:6789/0,HK-IDC1-10-1-72-160=10.1.72.160:6789/0}
election epoch 528, quorum 0,1,2,3 HK-IDC1-10-1-72-160,HK-IDC1-10-1-72-151,HK-IDC1-10-1-72-152,HK-IDC1-10-1-72-153
mdsmap e21038: 1/1/0 up {0=HK-IDC1-10-1-72-160=up:active}
osdmap e10536: 108 osds: 108 up, 108 in
flags sortbitwise
pgmap v424957: 6564 pgs, 3 pools, 3863 GB data, 67643 kobjects
8726 GB used, 181 TB / 189 TB avail
6560 active+clean
3 active+clean+scrubbing+deep
1 active+clean+scrubbing
It seems there should be "1/1/1 up" at mdsmap instead of "1/1/0 up" and I really don't know what the last number mean.
And there is cephfs if I run "ceph fs ls" which print this:
name: cephfs, metadata pool: cephfs_metadata, data pools: [cephfs_data ]
I try my best to Google such problem however i get nothing. And I still want to know if i can bring the cephfs back. So does any one have ideas?
Oh, I do the disaster recovery because I get "mdsmap e21012: 0/1/1 up, 1 up:standby, 1 damaged" at first. And to bring the fs back to work, I do "JOURNAL TRUNCATION", "MDS TABLE WIPES", "MDS MAP RESET". However I think there must exist (and most) files that their metadata have been saved at OSDs (metadata pool, in RADOS). I just want to get them.
Thanks.
Yingdi Guo
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