Why we get the error "failed to flush rbd_data.XXXX: (16) Device or resource busy" when we try to evict data from the cache tier in Ceph?
Issue
When trying to evict data from the cache tier using the following command:
$ rados -p volumes_ssd_tier cache-flush-evict-all
It fails with the following error:
failed to flush rbd_data.XXXX: (16) Device or resource busy
NOTE:
Using cache-tiering in production is not supported by Red Hat and it will be deprecated in Red Hat Ceph Storage 2.0.
Environment
- Red Hat Ceph Storage 1.3
- Ceph Cache-Tiering Feature
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