| 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 | 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 | Description |
|---|---|
| DataBlockEncoding |
Provide access to all data block encoding algorithms.
|
| Exception | Description |
|---|---|
| EncoderBufferTooSmallException |
Internal error which indicates a bug in a data block encoding algorithm.
|
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