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

Interface Summary

Interface	Description
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

Class	Description
AbstractDataBlockEncoder
AbstractDataBlockEncoder.AbstractEncodedSeeker
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.
EncodingState	Keeps track of the encoding state.
FastDiffDeltaEncoder	Encoder similar to DiffKeyDeltaEncoder but supposedly faster.
FastDiffDeltaEncoder.FastDiffSeekerState
HFileBlockDefaultDecodingContext	A default implementation of HFileBlockDecodingContext.
HFileBlockDefaultEncodingContext	A default implementation of HFileBlockEncodingContext.
NoneEncoder
PrefixKeyDeltaEncoder	Compress key by storing size of common prefix with previous KeyValue and storing raw size of rest.
RowIndexCodecV1	Store cells following every row's start offset, so we can binary search to a row's cells.
RowIndexEncoderV1
RowIndexSeekerV1

Enum Summary

Enum	Description
DataBlockEncoding	Provide access to all data block encoding algorithms.

Exception Summary

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