[GitHub] [carbondata] ravipesala commented on a change in pull request #3372: [CARBONDATA-3511] Query time improvement by reducing the number of NameNode calls while having carbonindex files in the store

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ravipesala commented on a change in pull request #3372: [CARBONDATA-3511] Query time improvement by reducing the number of NameNode calls while having carbonindex files in the store
URL: https://github.com/apache/carbondata/pull/3372#discussion_r321220480
 
 

 ##########
 File path: core/src/main/java/org/apache/carbondata/core/indexstore/BlockletDataMapIndexStore.java
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 @@ -64,6 +64,13 @@
    */
   private Map<String, Object> segmentLockMap;
 
+  /**
+   * map of segmentPath to the map of index/ merge index file path to its
+   * corresponding block info. While querying the table this map will be useful while creating the
+   * block info for the index or merge index file.
+   */
+  private Map<String, Map<String, BlockMetaInfo>> segInfoCache;
 
 Review comment:
   Global cache will be risky, how to clean it? Better have a method level cache.

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