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os/bluestore: differ default cache size for hdd/ssd backends #16157
We shoud update the document about memory consumption estimation for an OSD.
Cache can eat up 3GB/1GB
Looks like the number would be 7 - 8GB per NVMe Drive , or 5 - 6GB for HDD drive.
Not sure how community deploy their OSD, but at least we(ebay) is far from such memory/hdd ratio.