Storing and retrieval heuristics

In one embodiment, a system comprises a processor to retrieve a first data element including a value X0 and Y0, provide a hash function for use with a hash table having buckets, the hash function having a first and second input that in combination map to one of the buckets wherein the first input is in a range of X- values having X-value sub-ranges, the second input is in a range of Y-values having Y-value sub-ranges, different combinations of the X-value sub-ranges and the Y- value sub-ranges map using the hash function to different buckets, and input the value X0 and Y0 into the hash function yielding an output which is indicative of a first bucket of the hash-table. Related apparatus and methods are also described. 在个实施例中，系统包括处理器，该处理器：取回包括值X和Y的第数据元素；提供散列函数以供与具有桶的散列表起使用，该散列函数具有组合映射到桶之的第输入和第二输入，其中，第输入在具有X值子范围的X值的范围内，第二输入在具有Y值子范围的Y值的范围内，X值子范围和Y值子范围的不同组合使用散列函数映射到不同的桶；以及将值X和Y输入到散列函数中，产生指示散列表的第桶的输出。还描述了相关的装置和方法。