Package org.apache.hadoop.hbase.io.hfile.bucket

Provides BucketCache, an implementation of BlockCache.

See: Description

Interface Summary

Interface	Description
BucketEntry.BucketEntryHandler<T>
FileIOEngine.FileAccessor
IOEngine	A class implementing IOEngine interface supports data services for BucketCache.

Class Summary

Class	Description
BucketAllocator	This class is used to allocate a block with specified size and free the block when evicting.
BucketAllocator.Bucket
BucketAllocator.IndexStatistics	Statistics to give a glimpse into the distribution of BucketCache objects.
BucketCache	BucketCache uses BucketAllocator to allocate/free blocks, and uses BucketCache#ramCache and BucketCache#backingMap in order to determine if a given element is in the cache.
BucketCache.RAMCache	Wrapped the delegate ConcurrentMap with maintaining its block's reference count.
BucketCache.RAMQueueEntry	Block Entry stored in the memory with key,data and so on
BucketCache.StatisticsThread
BucketCacheStats	Class that implements cache metrics for bucket cache.
BucketEntry	Item in cache.
BucketProtoUtils
ByteBufferIOEngine	IO engine that stores data in memory using an array of ByteBuffers ByteBufferArray.
CachedEntryQueue	A memory-bound queue that will grow until an element brings total size larger than maxSize.
ExclusiveMemoryMmapIOEngine	IO engine that stores data to a file on the local block device using memory mapping mechanism
FileIOEngine	IO engine that stores data to a file on the local file system.
FileIOEngine.FileReadAccessor
FileIOEngine.FileWriteAccessor
FileMmapIOEngine	IO engine that stores data to a file on the specified file system using memory mapping mechanism
PersistentIOEngine	A class implementing PersistentIOEngine interface supports file integrity verification for BucketCache which use persistent IOEngine
PersistentIOEngine.DuFileCommand
SharedMemoryMmapIOEngine	IO engine that stores data in pmem devices such as DCPMM.

Exception Summary

Exception	Description
BucketAllocatorException	Thrown by BucketAllocator
CacheFullException	Thrown by BucketAllocator.allocateBlock(int) when cache is full for the requested size

Package org.apache.hadoop.hbase.io.hfile.bucket Description

Provides BucketCache, an implementation of BlockCache. See BucketCache for how it works.