Distributed Action Handler 26.2
Distributed Action Handler Help

# 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.

You specify the action to perform by setting VDBAction. Depending on the value of VDBAction, you might need to set additional parameters:

- When you set VDBAction to `PowerUp` or `PowerDown`, you must set either VDBID or VDBName.

- When you set VDBAction to `VDBAdd`, you must set VDBName, VDBType and VDBMapsTo.

NOTE: This is an administrative action that can be sent only by users that belong to an authorization role that allows the `Admin` standard role, or which enables the action explicitly. See Authorization Roles Configuration Parameters.

## Example

    http://localhost:9060/action=VDBManagement&VDBAction=PowerDown&VDBID=2,4

This action takes offline the VDBs with IDs `2` and `4`.

## Required Parameters

The following action parameters are required.

Parameter | Description
--- | ---
VDBAction | The action to take on the specified VDBs.

Depending on the value of VDBAction, you might need to set one or more of the following parameters.

Parameter | Description
--- | ---
VDBID | The IDs of the VDBs to perform the specified action on.
VDBName | The names of the VDBs to perform the specified action on.
VDBMapsTo | The database(s) to which the virtual database is mapped.
VDBType | Type of virtual databases, identified by either Distributor or Combinator.

## Optional Parameters

This action accepts the following optional parameters.

Parameter | Description
--- | ---
VDBInternal | Whether to make the virtual database internal.

This action accepts the following standard ACI action parameters.

Parameter | Description
--- | ---
ActionID | A string to use to identify an ACI action.
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

Copyright 2026 Open Text
Version 26.2 | Last updated April 2026

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Product: Knowledge Discovery Distributed Action Handler 26.2

Topic Title: VDBManagement