Package org.apache.hadoop.hbase.io.encoding

Interface Summary

DataBlockEncoder	Encoding of KeyValue.
DataBlockEncoder.EncodedSeeker	An interface which enable to seek while underlying data is encoded.
HFileBlockDecodingContext	A decoding context that is created by a reader's encoder, and is shared across the reader's all read operations.
HFileBlockEncodingContext	An encoding context that is created by a writer's encoder, and is shared across the writer's whole lifetime.

Class Summary

CopyKeyDataBlockEncoder	Just copy data, do not do any kind of compression.
DiffKeyDeltaEncoder	Compress using: - store size of common prefix - save column family once, it is same within HFile - use integer compression for key, value and prefix (7-bit encoding) - use bits to avoid duplication key length, value length and type if it same as previous - store in 3 bits length of timestamp field - allow diff in timestamp instead of actual value Format: - 1 byte: flag - 1-5 bytes: key length (only if FLAG_SAME_KEY_LENGTH is not set in flag) - 1-5 bytes: value length (only if FLAG_SAME_VALUE_LENGTH is not set in flag) - 1-5 bytes: prefix length - ...
DiffKeyDeltaEncoder.DiffCompressionState
DiffKeyDeltaEncoder.DiffSeekerState
EncodedDataBlock	Encapsulates a data block compressed using a particular encoding algorithm.
FastDiffDeltaEncoder	Encoder similar to DiffKeyDeltaEncoder but supposedly faster.
FastDiffDeltaEncoder.FastDiffSeekerState
HFileBlockDefaultDecodingContext	A default implementation of HFileBlockDecodingContext.
HFileBlockDefaultEncodingContext	A default implementation of HFileBlockEncodingContext.
PrefixKeyDeltaEncoder	Compress key by storing size of common prefix with previous KeyValue and storing raw size of rest.

Enum Summary

DataBlockEncoding

Provide access to all data block encoding algorithms.

Exception Summary

EncoderBufferTooSmallException

Internal error which indicates a bug in a data block encoding algorithm.