how oap working

[Liu,Jiapeng]

Hi all:
       I am from aifanfan team in baidu,
       As the current internal k8s is not perfect,we will use bns(like dynamic 
dns ) as service in k8s ,so we cannot use k8s registry now,I found skywalking 
has the standalone mode.
       I have the fllowing question:
       In my mind,the skywalking compute process is 
client->oap-receiver->oap-sink-file->oap-stream-compute->es
       I want to know if the oap clusters call each other directly ?
       Thanks for your helping
                                                                                
                                                                                
                                                         Evan.Liu