vanzin commented on a change in pull request #24616: [SPARK-27726] [Core] Fix
performance of ElementTrackingStore deletes when using InMemoryStore under high
loads
URL: https://github.com/apache/spark/pull/24616#discussion_r285313350
##########
File path:
common/kvstore/src/main/java/org/apache/spark/util/kvstore/KVStore.java
##########
@@ -126,4 +127,9 @@
*/
long count(Class<?> type, String index, Object indexedValue) throws
Exception;
+ /**
+ * A cheaper way to remove multiple items from the KVStore
+ */
+ <T> boolean removeAllByIndexValues(Class<T> klass, String index,
Collection<?> indexValues)
+ throws Exception;
Review comment:
nit: indented too much (2 or 4 spaces is fine here)
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