apache spark - How can I make (Spark1.6) saveAsTextFile to append existing file?

Question

In SparkSQL,I use DF.wirte.mode(SaveMode.Append).json(xxxx),but this method get these files like

the filename is too complex and random,I can't use api to get.So I want to use saveAstextfile ,beacuse filename is not complex and regular, but I don't know how to append file in same diretory?Appreciate for your time.

Answer 1

worked on Spark 1.5 , I think this is right usage..

dataframe.write().mode(SaveMode.Append).format(FILE_FORMAT).**partitionBy**("parameter1", "parameter2").save(path);