We have an existing workflow that we've moved from one server sharing a local disk via NFS to secondary servers to all of them mounting CephFS. The primary server runs a script similar to [1] this, but since we've moved it into CephFS, we get [2] this error. We added the sync in there to try to help this, but it didn't have an effect.
Does anyone have a suggestion other than looping over a sleep to wait for the tar to succeed? Waiting just a few seconds to run tar does work, but during a Ceph recovery situation, I can see that needing to be longer and longer.
[1] #!/bin/bash
cp -R /tmp/17857283/db.sql /cephfs/17857283/sync
tar --ignore-failed-read -cvzf /cephfs/17857283.tgz /cephfs/17857283
[2] tar: Removing leading `/' from member names
/cephfs/17857283/
/cephfs/17857283/db.sql
tar: /cephfs/17857283: file changed as we read it
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