Github user sitalkedia commented on a diff in the pull request:
https://github.com/apache/spark/pull/12944#discussion_r71418288
--- Diff:
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
---
@@ -66,6 +67,16 @@
@VisibleForTesting
final ConcurrentMap<AppExecId, ExecutorShuffleInfo> executors;
+ /**
+ * Caches index file information so that we can avoid open/close the
index files
+ * for each block fetch.
+ */
+ private final ShuffleIndexCache shuffleIndexCache;
+
+ // Max number of entries to keep in the index cache.
+ private static final String SPARK_SHUFFLE_SERVICE_INDEX_CACHE_ENTRIES =
"spark.shuffle.service.index.cache.entries";
+ private static final int
DEFAULT_SPARK_SHUFFLE_SERVICE_INDEX_CACHE_ENTRIES = 1024;
--- End diff --
I don't find a common place where spark.shuffle.service.* configs are
defined. For example if you check configs like spark.shuffle.service.enabled or
spark.shuffle.service.port, they are defined all over the code base.
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