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The following page has been changed by SanjayRadia:
http://wiki.apache.org/hadoop/HdfsFutures

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     * RPC and Timeout issues
        * When load spikes occur, the clients timeout and the spiral of death occurs<br />
-       * See [[#Hadoop_Protocol_RPC][ Hadoop Protocol RPC]]
+       * See [#Hadoop_Protocol_RPC/ Hadoop Protocol RPC]
  
     * Higher concurrency in Namespace access (more sophisticated Namespace locking)
        * This is probably an issue only on NN restart, not during normal operation
@@ -223, +223 @@

        * DNs can get most of their config from NN. The only DN specific config is the directories or the DN data blocks
  
     * Software version upgrades and version rollback P???
-       * See [[#Versioning][Rpc Protocol Versioning]]
+       * See [#Versioning/ Rpc Protocol Versioning]
     * Rolling upgrade when we have HA
  
  
@@ -244, +244 @@

  
  
  == Hadoop Protocol RPC ==
+ [[Anchor(Hadoop_Protocol_RPC)]]
  
  === RPC Timeouts, Connection handling, Q handling, threading ===
     * When load spikes occur, the clients timeout and the spiral of death occurs<br />
@@ -254, +255 @@

     * HDFS client side (or just MapRed?) should be able to recover from NN restarts and failovers
  
  === Versioning ===
+ [[Anchor(Versioning)]]
     * Across clusters
        * Versioning of the Hadoop client protocol, server can deal with clients of different versions
           *    The data types change frequently, fields added, deleted