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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "ZooKeeper/GSoCFailureDetector" by AbmarBarros
Date Mon, 16 Aug 2010 06:12:05 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The "ZooKeeper/GSoCFailureDetector" page has been changed by AbmarBarros.
http://wiki.apache.org/hadoop/ZooKeeper/GSoCFailureDetector?action=diff&rev1=8&rev2=9

--------------------------------------------------

   1. --(Refactor client-side code of the client-server monitoring to use the proposed FailureDetector
interface)--
   1. --(Make the failure detection and its parameters configurable on the client)--
   1. --(Refactor server-side code of the client-server monitoring to use the proposed FailureDetector
interface)--
-  1. Refactor the code of the server-server monitoring to use the proposed FailureDetector
interface
+  1. --(Refactor the code of the server-server monitoring to use the proposed FailureDetector
interface)--
-  1. Make the failure detection and its parameters configurable on the server (to server-server
and client-server monitoring)
+  1. --(Make the failure detection and its parameters configurable on the server (to server-server
and client-server monitoring))--
   1. Evaluate the QoS metrics with experimentation
-  1. Write Forrest docs
+  1. --(Write Forrest docs)--
  
  == Related JIRA ==
   * [[https://issues.apache.org/jira/browse/ZOOKEEPER-702|ZOOKEEPER-702: GSoC 2010: Failure
Detector Model]]
@@ -82, +82 @@

   * Created a new FailureDetector, which groups monitoreds by their tick time, similar to
what the SessionTracking does.
   * Made the server-client failure detector (and its parameters) options of the ZooKeeper
configuration file.
  
- === Currently working on ===
-  * Refactoring the code of the server-server monitoring to use the proposed FailureDetector
interface
+ ==== 23/Jul/10 ====
+  * Made Learners track client heartbeats and send statistical data of the heartbeat sampling
window to the Learner
+  * Analyzed paper about application message used as heartbeat. 
+  
+ ==== 30/Jul/10 ====
+  * Refactored the code of the Leader-Learner monitoring in order to use failure detector
module
+  * Added options in configuration file to configure Leader-Learner monitoring
+  * Fixed bugs in FDs initialization and in some cases of session registering
+  * Fixed bug in server recovery on the client side
+  
+ ==== 09/Aug/10 ====
+  * Set up first experiments in Emulab
+  * Instrumented code to report some detection metrics as false suspicion and detection time
+  * Enhanced java documentation, started to write forrest docs
+ 
+ ==== 14/Aug/10 ====
+  * Kept on changing experimentation scenarios to check the behaviour of the failure detectors
+  * Tuned some initialization parameters of the failure detectors based on some experimentation
results
+  * Finished writing forrest documentation
+  * Added a new parameter to phi accrual FD - the minimum window size to begin timeout adaptation.
+  * Added a moderation step to Bertier FD, to comply with second level task described in
his paper
+  * Made Chen's alpha parameter configurable, and not a quarter of the timeout
+ 
+ ==== 16/Aug/10 ====
  
  ----
  
+ == Experimentation ==
+ 
+ ==== Experimental design ====
+ 
+ ==== Results and conclusions ====
+ 
+ ----
  == Design decisions ==
  
  ==== Should a failure detector instance (FD) run in a separate thread from the application?
====

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