What is the alpha parameter of YCSB zipf distribution

Question

YCSB带有ZipfianGenerator类，此zipfian分布的alpha值是多少？

Answer 1

By checking the ZipfianGenerator code in the repository , the default value for alpha is 1/(1-theta) (line 142 ).

Theta is the 'zipfian constant' (line 137 ). Its default value is 0.99 (line 42 ), which gives an alpha value of 100 .

You can specify a different theta in the constructor to get a different alpha value.