Alter properties on an existing host in the cluster. Currently, the only property that can be altered is a hosts ability to accept failover processes.

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.

Input Parameter Description

hoststringIdentifies the host this applies to. Can be the host address, or formatted as 'hostN' where N is the host number as specified in gpudb.conf
optionsmap of string to strings

Optional parameters. The default value is an empty map ( {} ).

Supported Parameters (keys)Parameter Description

If set to true, the host will accept processes (ranks, graph server, etc.) in the event of a failover on another node in the cluster. See Cluster Resilience for more information. The default value is false. The supported values are:

  • true
  • false

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:

statusString'OK' or 'ERROR'
messageStringEmpty if success or an error message
data_typeString'admin_alter_host_request' or 'none' in case of an error
dataStringEmpty string
data_strJSON or String

This embedded JSON represents the result of the /admin/alter/host endpoint:

infomap of string to stringsAdditional information.

Empty string in case of an error.