bg tree vs original mode, original mode best case
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nodesize16k (default)
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block device
LVM thin on HDD
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fs total size20T
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fs used size12T
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fill methodfallocate -l 12T
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mount optionsnospace_cache
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Original mode (unit is 'us')
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run 1run 2run 3run 4run 5avgstd
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btrfs_read_chunk_tree95597.0389927.2499403.7996187.9393275.2494878.2463528.26302
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btrfs_verify_dev_extents29566.1753170.5735627.1936347.7636308.1138203.968835.868665
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btrfs_read_block_groups
137859.9112404.2106444.5134423.5114337.6121093.9414093.7964
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open_ctree320052.5632619.7287016.2320451.3286457.1369319.36148140.4267
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Bg-tree mode
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run 1run 2run 3run 4run 5avgstdavg diff vs original
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btrfs_read_chunk_tree96098.8594883.5796214.74100253.894385.8496367.362309.1048391.57%
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btrfs_verify_dev_extents37653.132242.233898.5225417.9232341.6132310.674432.225003-15.43%
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btrfs_read_block_groups
80603.91111682.778949.6375458.6370779.9683494.96616200.4684-31.05%
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open_ctree274761.2289783.2257027.9249991.1249756.2264263.9217521.22894-28.45%
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leavesnodes
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bg tree (bg tree mode)381
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extent tree (original mode)
2901
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