将RDD存储为带分区的序列文件？

Question

我想将java rdd存储为带有每小时分区的序列文件。有什么办法可以实现这个目的吗？

例如：

我有类型记录：

time,a1,a2,a3,a4,a5,a6,a7,a8

我想将密钥作为a2，a3，a4和值作为此密钥中的所有值以及按时分区的列。

在hdfs中它将存储为::

output/time=12345/sequence_file_of_key_and_values

Sample input:
1486203462,1,45,66,77,ansh,72,976,58
1486203461,1,452,66,77,ansh5,456,8754,09865
1486203462,1,45,66,77,ansh9,772,976,5890
1486203461,1,452,66,77,ansh156,742,96,5951

输出就像：

output/time=1486203462/a sequence file with key as (1,45,66,77) and corresponding values as ((1486203462,1,45,66,77,ansh,72,976,58),
1486203462,1,45,66,77,ansh9,772,976,5890))

output/time=1486203461/a sequence file with key as (1,452,66,77) and corresponding values as ((1486203461,1,452,66,77,ansh5,456,8754,09865),(1486203461,1,452,66,77,ansh156,742,96,5951))