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# VDBManagement

With the `VDBManagement` action, you can dynamically (without restarting the Distributed Action Handler) bring VDBs online or take them offline, when running in non-Mirror mode.

If a VDB is marked as offline, the Distributed Action Handler sends no requests (even polling requests) to it, until it is brought back online again.

Note: This is an administrative action that can be sent only from Distributed Action Handler AdminClients (which are set in the Distributed Action Handler configuration file `[Server]` section).

## Example

    http://Hobbes:25000/action=VDBManagement&VDBAction=PowerDown&VDBID=2,4

This action uses port `25000` to take offline the VDBs with IDs `2` and `4` of the Distributed Action Handler on the host `Hobbes`.

## Parameters

Parameter | Description | Required
--- | --- | ---
VDBAction | The action to take on the specified VDBs. | Yes
VDBID | The IDs of the VDBs to perform the specified action on. | see Comments
VDBInternal | Whether to make the virtual database internal. |
VDBName | The names of the VDBs to perform the specified action on. | see Comments
VDBMapsTo | The database(s) to which the virtual database is mapped. |
VDBType | Type of virtual databases, identified by either Distributor or Combinator. |

This action accepts the following standard ACI action parameters.

Parameter | Description
--- | ---
ActionID | A string to use to identify an ACI action.
EncryptResponse | Encrypt the output.
FileName | The file to write output to.
ForceTemplateRefresh | Forces the server to load the template from disk.
Output | Writes output to a file.
ResponseFormat | The format of the action output.
Template | The template to use for the action output.
TemplateParamCSVs | A list of variables to use for the specified template.

## Comments

- Either the VDBID or VDBName parameter is required if the VDBAction parameter has the value `PowerUp` or `PowerDown`.

- VDBName, VDBType and VDBMapsTo are required if VDBAction=`VDBAdd`.

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