> What is your EC config on the pool? k=3 m=2, on ssds > What is the output you're using to > judge how much space they're taking up? ceph df showed max_avail~=3T for data pool after uploading 50M files each about 5k ceph was 100% full So 3T/50M ~= 60k each file occupied, this is excepting ec-coded blocks. Probably this is because of bluestore_min_alloc_size_ssd=16k So the granularity of occupied space is 16k*3=48k. Plus some space occupied by xargs (profile, etc.), probably 4k for each ec-coded object, i.e. 4k*3=12k So with bluestore_min_alloc_size_ssd=4k I expect minimal raw space occupied by 5k file: 3+2 erasure-coding: 4k*5 + 4k*5 = 40k 3x replication: (8k + 4k)*3 = 36k I plan to test this cases, but theoretically, are this calculations correct? Thanks -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
