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/*
* include/util/bf_config.h
*
* Copyright (C) 2023 Douglas B. Rumbaugh <drumbaugh@psu.edu>
* Dong Xie <dongx@psu.edu>
*
* Distributed under the Modified BSD License.
*
* Global parameters for configuring bloom filters used as auxiliary
* structures on shards within the framework. The bloom filter class
* can be found in
*
* $PROJECT_ROOT/external/psudb-common/cpp/include/psu-ds/BloomFilter.h
*
*/
#pragma once
#include "psu-util/alignment.h"
namespace de {
/* global variable for specifying bloom filter FPR */
static double BF_FPR = .01;
/* global variable for specifying number of BF hash functions (k) */
static size_t BF_HASH_FUNCS = 7;
/*
* Adjust the value of BF_FPR. The argument must be on the interval
* (0, 1), or the behavior of bloom filters is undefined.
*/
static void BF_SET_FPR(double fpr) {
BF_FPR = fpr;
}
/*
* Adjust the value of BF_HASH_FUNCS. The argument must be on the interval
* (0, INT64_MAX], or the behavior of bloom filters is undefined.
*/
static void BF_SET_HASHFUNC(size_t func_cnt) {
BF_HASH_FUNCS = func_cnt;
}
}
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