Uses of Class org.apache.hadoop.hbase.io.encoding.BufferedDataBlockEncoder (Apache HBase 4.0.0-alpha-1-SNAPSHOT API)

Packages that use BufferedDataBlockEncoder

Package

Description

org.apache.hadoop.hbase.io.encoding

Uses of BufferedDataBlockEncoder in org.apache.hadoop.hbase.io.encoding

Subclasses of BufferedDataBlockEncoder in org.apache.hadoop.hbase.io.encoding

Modifier and Type

Class

Description

class

CopyKeyDataBlockEncoder

Just copy data, do not do any kind of compression.

class

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 - ...

class

FastDiffDeltaEncoder

Encoder similar to DiffKeyDeltaEncoder but supposedly faster.

class

PrefixKeyDeltaEncoder

Compress key by storing size of common prefix with previous KeyValue and storing raw size of rest.