作った
$ cat hello | cwlogs-cat -g my-group -s my-stream
$ cwlogs-tailf -g my-group -s my-stream 2016-05-13T01:51:18+09:00 foo 2016-05-13T01:51:18+09:00 bar 2016-05-13T01:51:19+09:00 zoo ...
$ cwlogs-tailf -g my-group stream1 2016-05-13T01:51:18+09:00 foo stream2 2016-05-13T01:51:18+09:00 bar stream1 2016-05-13T01:51:19+09:00 zoo ...