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bloomfilter x64实现

仿照Cassandra中的BloomFilter实现,Hash选用MurmurHash2,通过双重散列公式生成散列函数

  Hash(key, i) = (H1(key) + i * H2(key)) % m

bloomfilter使用例子

  #include "akbloomfilter.h"

  static BaseBloomFilter stBloomFilter = {0};

  // 初始化BloomFilter:
  InitBloomFilter(&stBloomFilter, 0, 100000, 0.00001);
  // 重置BloomFilter:
  ResetBloomFilter(&stBloomFilter);
  // 释放BloomFilter:
  FreeBloomFilter(&stBloomFilter);

  // 向BloomFilter中新增一个数值(0-正常,1-加入数值过多):
  uint32_t dwValue;
  iRet = BloomFilter_Add(&stBloomFilter, &dwValue, sizeof(uint32_t));

  // 检查数值是否在BloomFilter内(0-存在,1-不存在):
  iRet = BloomFilter_Check(&stBloomFilter, &dwValue, sizeof(uint32_t));

版本历史

  • 2012/12 完成初始版本
  • 2013/4/10 增加k/m的动态计算功能,参考:http://hur.st/bloomfilter
  • 2013/01/05 重构代码结构将实现和声明分离