Note
This parameter is available starting with V4.2.0.
Description
observer_id specifies the unique identifier assigned to an OBServer node by the RootService in the cluster.
Privilege requirements
Query the parameter
The
systenant and all user tenants can use theSHOW PARAMETERSstatement or theGV$OB_PARAMETERSview to query this parameter.Modify the parameter
The
systenant and user tenants cannot modify this parameter.
Attributes
| Attribute | Description |
|---|---|
| Type | Int |
| Default value | 0, which indicates an invalid observer_id |
| Value range | [1, 18446744073709551615] |
| Modifiable | No. The parameter is read-only. |
| Effective upon OBServer node restart | No. The parameter is read-only. |
Examples
Query the unique identifier assigned to an OBServer node by the RootService in the cluster.
obclient> SHOW PARAMETERS LIKE 'observer_id';
The query result is as follows:
+-------+----------+----------------+----------+-------------+-----------+-------+-----------------------------------------------------------------------------------------------------------------------------------------+----------+---------+---------+------------+---------------+-----------+
| zone | svr_type | svr_ip | svr_port | name | data_type | value | info | section | scope | source | edit_level | default_value | isdefault |
+-------+----------+----------------+----------+-------------+-----------+-------+-----------------------------------------------------------------------------------------------------------------------------------------+----------+---------+---------+------------+---------------+-----------+
| zone1 | observer | xx.xx.xx.xx | 2882 | observer_id | INT | 1 | the unique id that been assigned by rootservice for each observer in cluster, default: 0 (invalid id), Range: [1, 18446744073709551615] | OBSERVER | CLUSTER | DEFAULT | READONLY | 0 | 0 |
+-------+----------+----------------+----------+-------------+-----------+-------+-----------------------------------------------------------------------------------------------------------------------------------------+----------+---------+---------+------------+---------------+-----------+