Document description：
first:
The basic unit of data migration in a CnosDB cluster is Vnode. The enterprise edition of CnosDB cluster provides the following commands to support tiered storage:
SHOW DATANODES; // Show all nodes in the cluster
+-----------+-------+
| DataNodes | STATE |
+-----------+-------+
| 2001 | HOT |
| 1001 | HOT |
+-----------+-------+
ALTER NODE [node_id] STATUS [HOT/COLD]; // Modify the status of the node
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The actual execution result is as follows:
oceanic_station ❯ SHOW DATANODES;
+---------+-----------+-----------+---------+-----------+---------------------+
| NODE_ID | HOST | ATTRIBUTE | STATUS | DISK_FREE | LAST_UPDATED_TIME |
+---------+-----------+-----------+---------+-----------+---------------------+
| 1001 | localhost | HOT | HEALTHY | 28.22 GB | 2023-06-02 10:21:16 |
| 2001 | localhost | HOT | HEALTHY | 28.22 GB | 2023-06-02 10:21:16 |
| 3001 | localhost | HOT | HEALTHY | 28.22 GB | 2023-06-02 10:21:18 |
| 4001 | localhost | HOT | HEALTHY | 28.22 GB | 2023-06-02 10:21:17 |
+---------+-----------+-----------+---------+-----------+---------------------+
Query took 0.082 seconds.
second:
When modifying with 'ALTER NODE [node_id] STATUS [HOT/COLD]', the field is named 'STATUS', but it is displayed as 'STATE' or 'ATTRIBUTE'; can they be unified?