HDFS-7397. Add more detail to the documentation for the conf key "dfs.client.read.shortcircuit.streams.cache.size" (Brahma Reddy Battula via Colin P. McCabe)

(cherry picked from commit 3fe79e1db84391cb17dbed6b579fe9c803b3d1c2)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -173,6 +173,10 @@ Release 2.8.0 - UNRELEASED
     HDFS-8249. Separate HdfsConstants into the client and the server side
     class. (wheat9)
 
+    HDFS-7397. Add more detail to the documentation for the conf key
+    "dfs.client.read.shortcircuit.streams.cache.size" (Brahma Reddy Battula via
+    Colin P. McCabe)
+
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml

@@ -2054,7 +2054,7 @@
   <value>256</value>
   <description>
     The DFSClient maintains a cache of recently opened file descriptors.
-    This parameter controls the size of that cache.
+    This parameter controls the maximum number of file descriptors in the cache.
     Setting this higher will use more file descriptors,
     but potentially provide better performance on workloads
     involving lots of seeks.