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+===========
+ Journaler
+===========
+
+``journaler write head interval``
+
+:Description: How frequently to update the journal head object
+:Type: Integer
+:Required: No
+:Default: ``15``
+
+
+``journaler prefetch periods``
+
+:Description: How many stripe periods to read-ahead on journal replay
+:Type: Integer
+:Required: No
+:Default: ``10``
+
+
+``journal prezero periods``
+
+:Description: How many stripe periods to zero ahead of write position
+:Type: Integer
+:Required: No
+:Default: ``10``
+
+``journaler batch interval``
+
+:Description: Maximum additional latency in seconds we incur artificially. 
+:Type: Double
+:Required: No
+:Default: ``.001``
+
+
+``journaler batch max``
+
+:Description: Maximum bytes we will delay flushing. 
+:Type: 64-bit Unsigned Integer 
+:Required: No
+:Default: ``0``