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https://issues.apache.org/jira/browse/FLINK-9981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561195#comment-16561195
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ASF GitHub Bot commented on FLINK-9981:
---------------------------------------
sihuazhou commented on a change in pull request #6438: [FLINK-9981] Tune
performance of RocksDB implementation
URL: https://github.com/apache/flink/pull/6438#discussion_r205981566
##########
File path:
flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBOrderedSetStore.java
##########
@@ -116,7 +127,14 @@ public RocksDBOrderedSetStore(
@Override
public void add(@Nonnull T element) {
+
byte[] elementBytes = serializeElement(element);
+
+ if (LEXICOGRAPIC_BYTE_COMPARATOR.compare(elementBytes,
lowerBoundSeekKey) < 0) {
+ // a smaller element means a new lower bound.
+ lowerBoundSeekKey = elementBytes;
Review comment:
I wonder how could this happen? The `groupPrefixBytes` should be the
smallest element since all valid element should start with the
`groupPrefixBytes` or did I misunderstand something...
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> Tune performance of RocksDB implementation
> ------------------------------------------
>
> Key: FLINK-9981
> URL: https://issues.apache.org/jira/browse/FLINK-9981
> Project: Flink
> Issue Type: Sub-task
> Components: State Backends, Checkpointing
> Affects Versions: 1.6.0
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
> Labels: pull-request-available
>
> General performance tuning/polishing for the RocksDB implementation. We can
> figure out how caching/seeking can be improved.
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