Package org.apache.iotdb.db.engine.cache

Class BloomFilterCache

java.lang.Object

org.apache.iotdb.db.engine.cache.BloomFilterCache

public class BloomFilterCache
extends java.lang.Object

This class is used to cache BloomFilter in IoTDB. The caching strategy is LRU.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BloomFilterCache.BloomFilterCacheKey

Method Summary

Modifier and Type	Method	Description
double	calculateChunkHitRatio()
void	clear()	clear LRUCache.
org.apache.iotdb.tsfile.utils.BloomFilter	get(BloomFilterCache.BloomFilterCacheKey key)
org.apache.iotdb.tsfile.utils.BloomFilter	get(BloomFilterCache.BloomFilterCacheKey key, boolean debug)
double	getAverageLoadPenalty()
long	getAverageSize()
long	getEvictionCount()
org.apache.iotdb.tsfile.utils.BloomFilter	getIfPresent(BloomFilterCache.BloomFilterCacheKey key)
static BloomFilterCache	getInstance()
long	getMaxMemory()
void	remove(BloomFilterCache.BloomFilterCacheKey key)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static BloomFilterCache getInstance()

get

public org.apache.iotdb.tsfile.utils.BloomFilter get(BloomFilterCache.BloomFilterCacheKey key)
                                              throws java.io.IOException

Throws:

java.io.IOException

get

public org.apache.iotdb.tsfile.utils.BloomFilter get(BloomFilterCache.BloomFilterCacheKey key,
                                                     boolean debug)
                                              throws java.io.IOException

Throws:

java.io.IOException

calculateChunkHitRatio

public double calculateChunkHitRatio()

getEvictionCount

public long getEvictionCount()

getMaxMemory

public long getMaxMemory()

getAverageLoadPenalty

public double getAverageLoadPenalty()

getAverageSize

public long getAverageSize()

clear

public void clear()

clear LRUCache.

remove

public void remove(BloomFilterCache.BloomFilterCacheKey key)

getIfPresent

public org.apache.iotdb.tsfile.utils.BloomFilter getIfPresent(BloomFilterCache.BloomFilterCacheKey key)