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Scalable minimal perfect hashing

机译:可扩展的最小完美哈希

摘要

A minimal perfect hash function can be created for input data by dividing the input data into multiple collections, with each collection comprising fewer elements that the input data as a whole. Subsequently, minimal perfect hash functions can be created for each of the collections and the resulting hash values can be offset by a value equivalent to the number of input data in preceding collections. The minimal perfect hash function can, thereby, be derived in parallel and can consume substantially less storage space. To further save storage space, the internal state of each individual minimal perfect hash function can be further compressed using algorithms exploiting a skewed distribution of values in a lookup table comprising the internal state.
机译:通过将输入数据分为多个集合,可以为输入数据创建最小的完美哈希函数,每个集合包含的元素要少于输入数据整体。随后,可以为每个集合创建最小的完美哈希函数,并且可以将生成的哈希值偏移等于先前集合中输入数据数量的值。因此,最小完美散列函数可以并行导出,并且可以消耗少得多的存储空间。为了进一步节省存储空间,可以使用利用包含内部状态的查找表中的值的偏斜分布的算法,进一步压缩每个最小完美哈希函数的内部状态。

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