Hi All, Experimenting with cache pools for RBD, created two pools, slowdata-hot backed by slowdata-cold. Set up max data to be stored in hot to be 100GB, data to be moved to cold above 40% hot usage. Created a 100GB RBD image, mounted it tested reading/writing, then dumped in 80GB of data. All looked to be going well. Left everything to settle down and then unmounted the RBD and deleted it. Afterwards: pool name category KB objects clones degraded unfound rd rd KB wr wr KB slowdata-cold - 55835980 13817 0 0 0 27741 3 16818 67715123 slowdata-hot - 12 23610 0 0 0 1863785 112250386 150951 138481712 Deleting the RBD image cleaned out the hot pool's data but left the cold pool full of data and both of them full of objects. Anyone else trying this out? -Michael
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