Attempting to flush a cache tier pool fails with "Operation not supported".
This document (7022805) is provided subject to the disclaimer at the end of this document.
SUSE Enterprise Storage 5
When attempting to flush a cache tier pool, for example if it is needed to remove the cache tier, where the backing pool is an Erasure Coded pool and this is used to store RBD (Rados Block Device) images, this fails with "rbd_header.160nov41ge8922x:head tid 1963229 (95) Operation not supported".
It is needed to first migrate the RBD images header and metadata to another replicated pool.
Erasure Coded Pools only support storing RBD data, RBD image header and metadata information can only be stored on replicated Pools.
One possible option to migrate the RBDs may be to use for example rbd copy with the "--data-pool
" option. Further more, for an Erasure Coded Pool to be used to store data it must have the "overwrite
" flag set, which can only be done if all OSDs (Object Storage Daemons) are using Bluestore. For more information see the online SUSE Enterprise Storage 5 documentation
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- Document ID:7022805
- Creation Date:03-APR-18
- Modified Date:04-APR-18
- NovellSUSE Enterprise Storage
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