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What is the purpose of the change

Introduce BlockCompressor and BlockDecompressor to batch table runtime for future usage.

Brief change log

  • Add BlockCompressor interface
  • Add BlockDecompressor interface
  • Add LZ4 implementation based on the interfaces

Verifying this change

Added unit tests

Does this pull request potentially affect one of the following parts:

  • Dependencies (does it add or upgrade a dependency): (yes, lz4-java is introduced which is Apache license)
  • The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
  • The serializers: (no)
  • The runtime per-record code paths (performance sensitive): (no)
  • Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
  • The S3 file system connector: (no)

Documentation

  • Does this pull request introduce a new feature? (yes)
  • If yes, how is the feature documented? (JavaDocs)

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flinkbot commented Mar 8, 2019

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  • ❓ 1. The [description] looks good.
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@KurtYoung
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cc @JingsongLi

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@JingsongLi JingsongLi left a comment

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Thanks for working on this, LGTM, left some comments.


@Override
public int getMaxCompressedSize(int srcSize) {
return Lz4BlockCompressionFactory.HEADER_LENGTH + compressor.maxCompressedLength(srcSize);
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import Lz4BlockCompressionFactory.HEADER_LENGTH?

*/
public interface BlockCompressionFactory {

void setConfiguration(Configuration configuration);
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I don't know what this is for. Remove it?

throw new InsufficientBufferException("Buffer length too small");
}

if (src.limit() - prevSrcOff - Lz4BlockCompressionFactory.HEADER_LENGTH < compressedLen) {
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import Lz4BlockCompressionFactory.HEADER_LENGTH?

public class BlockCompressionTest {

@Test
public void testLz4() {
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test DataCorruptionException & InsufficientBufferException?

@KurtYoung
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Hi @JingsongLi , thanks for the review, i have addressed your comment.

@JingsongLi
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+1 LGTM

@KurtYoung KurtYoung closed this in 2345bbe Mar 8, 2019
@KurtYoung KurtYoung deleted the compress branch March 8, 2019 09:29
<version>${janino.version}</version>
</dependency>

<!-- Lz4 compression library -->
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@KurtYoung please also update the LICENSE file. Here is a rough description: https://cwiki.apache.org/confluence/display/FLINK/Licensing

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ok, will do

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5 participants