alexeykudinkin commented on code in PR #7642:
URL: https://github.com/apache/hudi/pull/7642#discussion_r1087234130
##########
hudi-common/src/main/java/org/apache/hudi/common/table/log/AbstractHoodieLogRecordReader.java:
##########
@@ -807,16 +809,17 @@ private ClosableIteratorWithSchema<HoodieRecord>
getRecordsIterator(
Option<Pair<Function<HoodieRecord, HoodieRecord>, Schema>>
schemaEvolutionTransformerOpt =
composeEvolvedSchemaTransformer(dataBlock);
+
// In case when schema has been evolved original persisted records will
have to be
// transformed to adhere to the new schema
- if (schemaEvolutionTransformerOpt.isPresent()) {
- return ClosableIteratorWithSchema.newInstance(
- new CloseableMappingIterator<>(blockRecordsIterator,
- schemaEvolutionTransformerOpt.get().getLeft()),
- schemaEvolutionTransformerOpt.get().getRight());
- } else {
- return ClosableIteratorWithSchema.newInstance(blockRecordsIterator,
dataBlock.getSchema());
- }
+ Function<HoodieRecord, HoodieRecord> transformer =
Review Comment:
Good catch! Not sure how this change actually crippled in here. Will clean
it up
##########
hudi-common/src/main/java/org/apache/hudi/metadata/BaseTableMetadata.java:
##########
@@ -73,11 +73,12 @@ public abstract class BaseTableMetadata implements
HoodieTableMetadata {
private static final Logger LOG =
LogManager.getLogger(BaseTableMetadata.class);
- public static final long MAX_MEMORY_SIZE_IN_BYTES = 1024 * 1024 * 1024;
- public static final int BUFFER_SIZE = 10 * 1024 * 1024;
+ protected static final long MAX_MEMORY_SIZE_IN_BYTES = 1024 * 1024 * 1024;
+ // NOTE: Buffer-size is deliberately set pretty low, since MT internally is
relying
+ // on HFile (serving as persisted binary key-value mapping) to do
caching
+ protected static final int BUFFER_SIZE = 10 * 1024; // 10Kb
Review Comment:
Yeah, this patch have been quite heavily benchmarked by now
You can get more context on this one in here:
https://github.com/apache/hudi/pull/6815/files#r1083144222
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