starting with Longhorn I understand that it uses thin provisioned block devices. If we fill it with data, the volume grows (needs more space on disk). Deleting data from the volume by definition does not free space on the disk.
This espacially needs some attention, when we have to backup and there is no compression related to amount of data neither an incremental backup.
Are there some best practices to cover such challenge?
Well, offline copy of volumes with xxxGi will result in substantial downtime.
Any better ideas / practices?`