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druidhll

python version of druid hll

druid 使用的hll算法

druid origin hll 精度和宽度固定 11,4. 可以在导入时使用spark提前计算好hll。相比使用dr的 roll up 功能更加高效

导入 metric 定义: { "type": "hyperUnique", "name": "hll_uv", "fieldName": "hll_uv", "isInputHyperUnique": true, "round": false }

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python version of druid hll

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