Hi, I am quite new to Ceph, so forgive me for any stupid questions. Setup: - 2 datacenters, each datacenter has 26 OSD’s, which makes in total 52 OSD’s. - ceph osd df shows that every disk is 1484GB. - I have 2 rulesets and 4 pools, 1 ruleset + 2 pools per datacenter. Each ruleset has 26 OSD’s. - 52 OSD * 1484GB makes: 77.168GB. To my understanding – ceph df – should show 4 pools and the MAX AVAIL of each pool should be the size of all OSDs together in the ruleset: 77168GB / 3 replicas = 25.722GB / 2 rulesets = 12.861GB. But in my case, ceph df shows indeed the 4 pools, but the MAX AVAIL of each pool is 7545G and not 12861GB. What is wrong with my calculation? When I multiply 7545G with 3 replicas = 22.635 * 2 rulesets = 45.270GB. Thanks! |
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