@Private @Unstable

Package org.apache.hadoop.io.erasurecode.rawcoder

Raw erasure coders. Raw erasure coder is part of erasure codec framework, where erasure coder is used to encode/decode a group of blocks (BlockGroup) according to the codec specific BlockGroup layout and logic. An erasure coder extracts chunks of data from the blocks and can employ various low level raw erasure coders to perform encoding/decoding against the chunks. To distinguish from erasure coder, here raw erasure coder is used to mean the low level constructs, since it only takes care of the math calculation with a group of byte buffers.

Interface Summary

Interface	Description
RawErasureCoderFactory	Raw erasure coder factory that can be used to create raw encoder and decoder.

Class Summary

Class	Description
CoderUtil	Helpful utilities for implementing some raw erasure coders.
DecodingValidator	A utility class to validate decoding.
DummyRawDecoder	A dummy raw decoder that does no real computation.
DummyRawEncoder	A dummy raw encoder that does no real computation.
DummyRawErasureCoderFactory	A raw erasure coder factory for dummy raw coders.
NativeRSRawDecoder	A Reed-Solomon raw decoder using Intel ISA-L library.
NativeRSRawEncoder	A Reed-Solomon raw encoder using Intel ISA-L library.
NativeRSRawErasureCoderFactory	A raw coder factory for raw Reed-Solomon coder in native using Intel ISA-L.
NativeXORRawDecoder	A XOR raw decoder using Intel ISA-L library.
NativeXORRawEncoder	A XOR raw encoder using Intel ISA-L library.
NativeXORRawErasureCoderFactory	A raw coder factory for xor coder in native using Intel ISA-L library.
RawErasureDecoder	An abstract raw erasure decoder that's to be inherited by new decoders.
RawErasureEncoder	An abstract raw erasure encoder that's to be inherited by new encoders.
RSLegacyRawDecoder	A raw erasure decoder in RS code scheme in pure Java in case native one isn't available in some environment.
RSLegacyRawEncoder	A raw erasure encoder in RS code scheme in pure Java in case native one isn't available in some environment.
RSLegacyRawErasureCoderFactory	A raw coder factory for the legacy raw Reed-Solomon coder in Java.
RSRawDecoder	A raw erasure decoder in RS code scheme in pure Java in case native one isn't available in some environment.
RSRawEncoder	A raw erasure encoder in RS code scheme in pure Java in case native one isn't available in some environment.
RSRawErasureCoderFactory	A raw coder factory for the new raw Reed-Solomon coder in Java.
XORRawDecoder	A raw decoder in XOR code scheme in pure Java, adapted from HDFS-RAID.
XORRawEncoder	A raw encoder in XOR code scheme in pure Java, adapted from HDFS-RAID.
XORRawErasureCoderFactory	A raw coder factory for raw XOR coder.

Exception Summary

Exception	Description
InvalidDecodingException	Thrown for invalid decoding.