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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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17
hoodie-client/src/main/java/com/uber/hoodie/io/HoodieAppendHandle.java
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@@ -159,11 +159,14 @@ public class HoodieAppendHandle<T extends HoodieRecordPayload> extends HoodieIOH
return Optional.empty();
}
// TODO (NA) - Perform a schema check of current input record with the last schema on log file
// to make sure we don't append records with older (shorter) schema than already appended
public void doAppend() {
int maxBlockSize = config.getLogFileDataBlockMaxSize(); int numberOfRecords = 0;
Map<HoodieLogBlock.LogMetadataType, String> metadata = Maps.newHashMap();
metadata.put(HoodieLogBlock.LogMetadataType.INSTANT_TIME, commitTime);
Map<HoodieLogBlock.HeaderMetadataType, String> header = Maps.newHashMap();
header.put(HoodieLogBlock.HeaderMetadataType.INSTANT_TIME, commitTime);
header.put(HoodieLogBlock.HeaderMetadataType.SCHEMA, schema.toString());
while (recordItr.hasNext()) {
HoodieRecord record = recordItr.next();
// update the new location of the record, so we know where to find it next
@@ -178,7 +181,7 @@ public class HoodieAppendHandle<T extends HoodieRecordPayload> extends HoodieIOH
// Recompute averageRecordSize before writing a new block and update existing value with avg of new and old
logger.info("AvgRecordSize => " + averageRecordSize);
averageRecordSize = (averageRecordSize + SizeEstimator.estimate(record))/2;
doAppend(metadata);
doAppend(header);
numberOfRecords = 0;
}
Optional<IndexedRecord> indexedRecord = getIndexedRecord(record);
@@ -189,18 +192,18 @@ public class HoodieAppendHandle<T extends HoodieRecordPayload> extends HoodieIOH
}
numberOfRecords++;
}
doAppend(metadata);
doAppend(header);
}
private void doAppend(Map<HoodieLogBlock.LogMetadataType, String> metadata) {
private void doAppend(Map<HoodieLogBlock.HeaderMetadataType, String> header) {
try {
if (recordList.size() > 0) {
writer = writer.appendBlock(new HoodieAvroDataBlock(recordList, schema, metadata));
writer = writer.appendBlock(new HoodieAvroDataBlock(recordList, header));
recordList.clear();
}
if (keysToDelete.size() > 0) {
writer = writer.appendBlock(
new HoodieDeleteBlock(keysToDelete.stream().toArray(String[]::new), metadata));
new HoodieDeleteBlock(keysToDelete.stream().toArray(String[]::new), header));
keysToDelete.clear();
}
} catch (Exception e) {