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Introducing HoodieLogFormat V2 with versioning support

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- HoodieLogFormat V2 has support for LogFormat evolution through versioning
			- LogVersion is associated with a LogBlock not a LogFile
			- Based on a version for a LogBlock, approporiate code path is executed
		- Implemented LazyReading of Hoodie Log Blocks with Memory / IO tradeoff
		- Implemented Reverse pointer to be able to traverse the log in reverse
		- Introduce new MAGIC for backwards compatibility with logs without versions
This commit is contained in:
Nishith Agarwal
2018-02-15 11:01:25 -08:00
committed by vinoth chandar
parent dfd1979c51
commit 5405a6287b
32 changed files with 2066 additions and 677 deletions
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7
hoodie-hadoop-mr/src/test/java/com/uber/hoodie/hadoop/realtime/HoodieRealtimeRecordReaderTest.java
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@@ -91,9 +91,10 @@ public class HoodieRealtimeRecordReaderTest {
records.add(SchemaTestUtil.generateAvroRecordFromJson(schema, i, newCommit, "fileid0"));
}
Schema writeSchema = records.get(0).getSchema();
Map<HoodieLogBlock.LogMetadataType, String> metadata = Maps.newHashMap();
metadata.put(HoodieLogBlock.LogMetadataType.INSTANT_TIME, newCommit);
HoodieAvroDataBlock dataBlock = new HoodieAvroDataBlock(records, writeSchema, metadata);
Map<HoodieLogBlock.HeaderMetadataType, String> header = Maps.newHashMap();
header.put(HoodieLogBlock.HeaderMetadataType.INSTANT_TIME, newCommit);
header.put(HoodieLogBlock.HeaderMetadataType.SCHEMA, writeSchema.toString());
HoodieAvroDataBlock dataBlock = new HoodieAvroDataBlock(records, header);
writer = writer.appendBlock(dataBlock);
long size = writer.getCurrentSize();
return writer;