Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2279#discussion_r186697865
--- Diff:
datamap/bloom/src/main/java/org/apache/carbondata/datamap/bloom/BloomCoarseGrainDataMapFactory.java
---
@@ -65,9 +65,18 @@
* and all the indexed value is distinct.
*/
private static final int DEFAULT_BLOOM_FILTER_SIZE = 32000 * 20;
+ /**
+ * property for fpp(false-positive-probability) of bloom filter
+ */
+ private static final String BLOOM_FPP = "bloom_fpp";
--- End diff --
yes, it is an configuration for bloom filter.
If
n : bloomfilterSize
p : fpp
then
`p` will decide the number of hash functions used internally by bloom
filter
`n` and `p` together decide the length of bits used internally by bloom
filter
---
