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About vertica-udx-zygote process and its port



I want to know how the port of vertica-udx-zygote process is configured, and can I stop the process if I don't need it?


From vsql I see there are three UDxZygoteProcess on three nodes, with different port:


dbadmin=> select * from UDX_FENCED_PROCESSES;
node_name | process_type | session_id | language | pid | port | status
v_data_node0001 | UDxZygoteProcess | | | 42900 | 22441 | UP
v_data_node0002 | UDxZygoteProcess | | | 4874 | 39778 | UP
v_data_node0003 | UDxZygoteProcess | | | 23117 | 23601 | UP
(3 rows)


From Vertica Guide,


"The HP Vertica zygote process starts when HP Vertica starts. Each node has a single zygote


And from netstat command I see the port is bound to


tcp        0      0     *                   LISTEN      42900/vertica-udx-z 

tcp        0      0     *                   LISTEN      4874/vertica-udx-zy 

tcp        0      0     *                   LISTEN      23117/vertica-udx-z 



1.Why the port of the process is different on different nodes? Can I set same port for them?

2.If I don't need to use UDX, can I stop the vertica-udx-zygote process?


Thanks a lot for your help!


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