Re: [cinder] How to retype while maintaining volume usage

Hi Eugen, Thank you for your reply. I've confirmed that 'rbd sparsify' can increase available space. However, I believe there's room for improvement in the retype implementation. Currently, retyping between Ceph backends causes zero-filling, which unnecessarily consumes time and storage space. This is likely to happen frequently, for example, with retypes between Ceph's HDD and SSD backends, and the Ceph administrator would need to run 'rbd sparsify' frequently. Are there any improvements to the retype implementation being considered in the community? I would also appreciate hearing your opinion on the need for improvement. Best regards,