This node creates work items that will start up a PDG service.
You can also start up PDG services from the PDG Services panel.
Open PDG Service Panel
Opens the PDG Services panel.
Determines when this node will generate work items. You should generally leave this set to “Automatic” unless you know the node requires a specific generation mode, or that the work items need to be generated dynamically.
All Upstream Items are Generated
This node will generate work items once all of the input nodes have generated their work items.
All Upstream Items are Cooked
This node will generate work items once all of the input nodes have cooked their work items.
Each Upstream Item is Cooked
This node will generate work items each time a work item in an input node is cooked.
The generation mode is selected based on the generation mode of the input nodes. If any of the input nodes are generating work items when their inputs cook, this node will be set to Each Upstream Item is Cooked. Otherwise, it will be set to All Upstream Items are Generated.
Start Service During
Determines when the service is started.
Starts the service during the cook stage in the same process as the Houdini session.
Starts the service when the work item is generating.
Copy Inputs to Outputs
When on, work items in this node copy input files to their output file list.
Service Already Running
Determines how the node operates when the specified service (as defined by the Service Name parameter) is already running.
The node does nothing and the work item will successfully cook.
The node reports a warning and the work item will successfully cook.
The node reports an error and the work item will fail.
Specifies the name of the service to start. Type the name in this field or select the service from the drop-down list. If you want to start multiple services at once, then you can specify an expression.
TOP Scheduler Override
This parameter overrides the TOP scheduler for this node.
Work Item Label
Determines how the node should label its work items. This parameter allows you to assign non-unique label strings to your work items which are then used to identify the work items in the attribute panel, task bar, and scheduler job names.
Use Default Label
The work items in this node will use the default label from the TOP network, or have no label if the default is unset.
Inherit From Upstream Item
The work items inherit their labels from their parent work items.
The work item label is set to the Label Expression custom expression which is evaluated for each item.
Node Defines Label
The work item label is defined in the node’s internal logic.
When on, this parameter specifies a custom label for work items created by this node. The parameter can be an expression that includes references to work item attributes or built-in properties. For example,
$OS: @pdg_frame will set the label of each work item based on its frame value.
Work Item Priority
This parameter determines how the current scheduler prioritizes the work items in this node.
Inherit From Upstream Item
The work items inherit their priority from their parent items. If a work item has no parent, its priority is set to 0.
The work item priority is set to the value of Priority Expression.
Node Defines Priority
This parameter specifies an expression for work item priority. The expression is evaluated for each work item in the node.
This parameter is only available when Work Item Priority is set to Custom Expression.