gistfile1.txt

[default@test] create column family structure
...	    with comparator = AsciiType
...	    and column_metadata =
...	    [{
...	        column_name : 'resolution',
...	        validation_class : DoubleType
...	    }];
Unable to find abstract-type class 'org.apache.cassandra.db.marshal.DoubleType'
[default@test] create column family structure
...	    with comparator = AsciiType
...	    and column_metadata =
...	    [{
...	        column_name : 'resolution',
...	        validation_class : 'org.apache.cassandra.db.marshal.DoubleType'
...	    }];
Unable to find abstract-type class 'org.apache.cassandra.db.marshal.DoubleType'