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I'm trying to remove a cache tier while I have a VM running, but a few
of the objects will not evict. Do you have to stop all RBD access to
remove a cache tier?
# ceph osd tier cache-mode ssd-pool forward
# rados -p ssd-pool cache-flush-evict-all
- --- lots of objects evicted, some failed with device or resource busy -----
*** try again, just in case ***
# rados -p ssd-pool cache-try-flush-evict-all
rbd_header.2507f43faa7343
failed to evict /rbd_header.2507f43faa7343: (16) Device or resource busy
rbd_header.2509da78c8b8fc
failed to evict /rbd_header.2509da78c8b8fc: (16) Device or resource busy
rbd_header.2505b7ad46de5
failed to evict /rbd_header.2505b7ad46de5: (16) Device or resource busy
rbd_header.2509b9400aab77
failed to evict /rbd_header.2509b9400aab77: (16) Device or resource busy
error from cache-try-flush-evict-all: (1) Operation not permitted
*** try to evict on manually ***
# rados -p ssd-pool cache-flush rbd_header.2507f43faa7343
# rados -p ssd-pool cache-evict rbd_header.2507f43faa7343
error from cache-evict rbd_header.2507f43faa7343: (16) Device or resource busy
It would be nice to not have to shut down VMs to remove a cache tier.
Thanks,
- ----------------
Robert LeBlanc
PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
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