URL: http://<db.host>:<hm.port>/admin/switchover
Manually switch over one or more processes to another host. Individual ranks or entire hosts may be moved to another host.
NOTE: This endpoint is serviced by the host manager, not the database cluster itself, so the port specified needs to be the host manager port instead. The default host manager port can be found under Default Ports. For more information on the host manager, see Host Manager.
NOTE: This endpoint should be used for on-premise deployments only.
Input Parameter Description
| Name | Type | Description | ||||
|---|---|---|---|---|---|---|
| processes | array of strings | Indicates the process identifier to switch over to another host. Options are 'hostN' and 'rankN' where 'N' corresponds to the number associated with a host or rank in the Network section of the gpudb.conf file; e.g., 'host[N].address' or 'rank[N].host'. If 'hostN' is provided, all processes on that host will be moved to another host. Each entry in this array will be switched over to the corresponding host entry at the same index in input parameter destinations. | ||||
| destinations | array of strings | Indicates to which host to switch over each corresponding process given in input parameter processes. Each index must be specified as 'hostN' where 'N' corresponds to the number associated with a host or rank in the Network section of the gpudb.conf file; e.g., 'host[N].address'. Each entry in this array will receive the corresponding process entry at the same index in input parameter processes. | ||||
| options | map of string to strings | Optional parameters. The default value is an empty map ( {} ).
|
Output Parameter Description
The GPUdb server embeds the endpoint response inside a standard response structure which contains status information and the actual response to the query. Here is a description of the various fields of the wrapper:
| Name | Type | Description | ||||||
|---|---|---|---|---|---|---|---|---|
| status | String | 'OK' or 'ERROR' | ||||||
| message | String | Empty if success or an error message | ||||||
| data_type | String | 'admin_switchover_response' or 'none' in case of an error | ||||||
| data | String | Empty string | ||||||
| data_str | JSON or String | This embedded JSON represents the result of the /admin/switchover endpoint:
Empty string in case of an error. |
