yucai commented on a change in pull request #19788: [SPARK-9853][Core] Optimize
shuffle fetch of contiguous partition IDs
URL: https://github.com/apache/spark/pull/19788#discussion_r249515209
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File path:
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
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@@ -161,22 +161,69 @@ public void registerExecutor(
executors.put(fullId, executorInfo);
}
+ // For testing
+ public ManagedBuffer getBlockData(
+ String appId,
+ String execId,
+ int shuffleId,
+ int mapId,
+ int reduceId) {
+ return getBlockData(appId, execId, shuffleId, mapId, reduceId, 1);
+ }
+
/**
- * Obtains a FileSegmentManagedBuffer from (shuffleId, mapId, reduceId). We
make assumptions
- * about how the hash and sort based shuffles store their data.
+ * Obtains a FileSegmentManagedBuffer from (shuffleId, mapId, reduceId,
numBlocks). We make
+ * assumptions about how the hash and sort based shuffles store their data.
*/
public ManagedBuffer getBlockData(
String appId,
String execId,
int shuffleId,
int mapId,
- int reduceId) {
+ int reduceId,
+ int numBlocks) {
Review comment:
If we name it `startReducerId`, do you think we need name `mapId` to
`mapperId` also?
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