Contents

SHOW COMPONENTS

Contents

SHOW COMPONENTS#

SHOW COMPONENTS is used to show the information of components.

SHOW COMPONENTS;

Output Information#

Column	Note
Endpoint	It shows the endpoint of the component by providing the IP and the port, which is the same as the `--endpoint` flag in configuration files.
Role	It indicates the role of the component, which is the same as the `--role` flag in configuration files. There are four types of roles: `tablet`, `nameserver`, `taskmanager` and `apiserver`.
Connect_time	It shows the timestamp (in milliseconds) of connection establishment of the component.
Status	It shows the status of the component. There are three kinds of status: `online`, `offline` and `NULL`.
Ns_role	It shows the role of the Namserver: `master` or `standby`. For other components, Ns_role is `NULL`.

Note

Currently, there are certain limitations of SHOW COMPONETS:

It does not include the information of the APIServer.
It can only shows the information of one leader task manager, but is not working for followers.
The Connect_time of nameserver in tha standalone version is inaccurate.

Example#

SHOW COMPONENTS;
 ---------------- ------------ --------------- -------- --------- 
  Endpoint         Role         Connect_time    Status   Ns_role  
 ---------------- ------------ --------------- -------- --------- 
  127.0.0.1:9520   tablet       1654759517890   online   NULL     
  127.0.0.1:9521   tablet       1654759517942   online   NULL     
  127.0.0.1:9522   tablet       1654759517919   online   NULL     
  127.0.0.1:9622   nameserver   1654759519015   online   master   
  127.0.0.1:9623   nameserver   1654759521016   online   standby  
  127.0.0.1:9624   nameserver   1654759523030   online   standby  
 ---------------- ------------ --------------- -------- --------- 