We have a Luminous cluster which has filled up to 100% multiple times and this causes an inode to be left in a bad state. Doing anything to these files causes the client to hang which requires evicting the client and failing over the MDS. Usually we move the parent directory out of the way and things mostly are okay. However in this last fill up, we have a significant amount of storage that we have moved out of the way and really need to reclaim that space. I can't delete the files around it as listing the directory causes a hang.
We can get the inode that is bad from the logs/blocked_ops, how can we tell MDS that the inode is lost and to forget about it without trying to do any checks on it (checking the RADOS objects may be part of the problem)? Once the inode is out of CephFS, we can clean up the RADOS objects manually or leave them there to rot.
Thanks,
Robert LeBlanc
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Robert LeBlanc
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Robert LeBlanc
PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
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