sijie commented on a change in pull request #368: Issue 360: [documentation] 
configuration settings
URL: https://github.com/apache/bookkeeper/pull/368#discussion_r130921592
 
 

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 File path: bookkeeper-server/conf/bk_server.conf
 ##########
 @@ -40,11 +40,21 @@ bookiePort=3181
 # establish their identities as 127.0.0.1:3181, and only one will be able
 # to join the cluster. For VPSs configured like this, you should explicitly
 # set the listening interface.
-#allowLoopback=false
+# allowLoopback=false
+
+# Whether the bookie allowed to use an ephemeral port (port 0) as its server 
port.
+# By default, an ephemeral port is not allowed. Using an ephemeral port
+# as the service port usually indicates a configuration error. However, in unit
+# tests, using ephemeral port will address port conflicts problem and allow
+# running tests in parallel.
+# allowEphemeralPorts=false
 
 # Directory Bookkeeper outputs its write ahead log
 journalDirectory=/tmp/bk-txn
 
+# Directories Bookkeeper outputs its write ahead log
 
 Review comment:
   Directories BookKeeper outputs its write ahead log.
   Could define multi directories to store write head logs, separated by ','.
   For example:
   journalDirectories=/tmp/bk-journal1,/tmp/bk-journal2
   
   if `journalDirectories` is set, bookies will skip `journalDirectory` and use 
this setting directory.
 
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