[ceph-users] Howto add DB (aka RockDB) device to existing OSD on HDD

Hi, I have created OSD on HDD w/o putting DB on faster drive. In order to improve performance I have now a single SSD drive with 3.8TB. I modified /etc/ceph/ceph.conf by adding this in [global]: bluestore_block_db_size = 53687091200 This should create RockDB with size 50GB. Then I tried to mov

[ceph-users] Howto define OSD weight in Crush map

Hi, after adding an OSD to Ceph it is adviseable to create a relevant entry in Crush map using a weight size depending on disk size. Example: ceph osd crush set osd. root=default host= Question: How is the weight defined depending on disk size? Which algorithm can be used to calculate the wei