At 2024-09-22 16:31:48, "David Wang" <[email protected]> wrote: >>Hi, >>
>btree_io write pattern, collected from btree_node_write_endio, >is kind of uniform/flat distributed, not on block-friendly size >boundaries (I think): > +---------+------------+ > | sectors | percentage | > +---------+------------+ > | 1 | 9.021% | > | 3 | 1.440% | > | 4 | 1.249% | > | 2 | 1.157% | > | 5 | 0.804% | > | 6 | 0.409% | > | 14 | 0.259% | > | 15 | 0.253% | > | 16 | 0.228% | > | 7 | 0.226% | > | 11 | 0.223% | > | 10 | 0.223% | > | 13 | 0.222% | > | 9 | 0.213% | > | 12 | 0.202% | > | 41 | 0.194% | > | 17 | 0.183% | > | 8 | 0.182% | > | 18 | 0.167% | > | 20 | 0.167% | > | 19 | 0.163% | > | 21 | 0.160% | > | 205 | 0.158% | > | 22 | 0.145% | > | 23 | 0.117% | > | 24 | 0.093% | > | 51 | 0.089% | > | 25 | 0.080% | > | 204 | 0.079% | > +---------+------------+ > Oops...wrong weight used to calculate percentage, it should be +---------+------------+ | sectors | percentage | +---------+------------+ | 1 | 45.105% | | 3 | 7.200% | | 4 | 6.244% | | 2 | 5.785% | | 5 | 4.018% | | 6 | 2.045% | | 14 | 1.296% | | 15 | 1.264% | | 16 | 1.141% | | 7 | 1.129% | | 11 | 1.117% | | 10 | 1.113% | | 13 | 1.111% | | 9 | 1.065% | | 12 | 1.011% | | 41 | 0.971% | | 17 | 0.913% | | 8 | 0.912% | | 18 | 0.836% | | 20 | 0.835% | | 19 | 0.812% | | 21 | 0.799% | | 205 | 0.791% | | 22 | 0.724% | | 23 | 0.587% | | 24 | 0.465% | | 51 | 0.443% | | 25 | 0.398% | | 204 | 0.396% | +---------+------------+ David
