# Advanced Connector Properties

IDOL NiFi Ingest Connectors support some properties which you can use to customize the behavior of the processor. These properties are supported by all connectors.

Property Name | Description | Default
--- | --- | ---
`adv:ConnectionValidation` | A Boolean value that specifies whether the connector validates its connection to the repository using any connection details or credentials you have provided. When this feature is enabled the connector provides a warning if the connection is not successful. | True
`adv:IngestBatchSize` | The number of documents to create before releasing a batch of documents to the outgoing queue. This property only applies to processors, such as GetFileSystem, that perform the synchronize action and have names beginning with "Get". | 100
`adv:PurgeDatastore` | A Boolean value that specifies whether to purge (clear) the datastore after each scheduled synchronize cycle. By default, a connector stores information about the items it has retrieved from a repository so that it does not need to retrieve them again unless they are modified. If you set this property to `TRUE` the connector performs a full synchronize on every scheduled synchronize cycle. NOTE: If you set this property to `TRUE`, the connector cannot issue delete commands for items that were previously synchronized but have been deleted from the source repository. This property only applies to processors, such as GetFileSystem, that perform the synchronize action and have names beginning with "Get". | False
`adv:TaskMaxDuration` | The maximum amount of time that the processor should run for. If the time limit is reached the connector stops until the next scheduled task begins. Specify the duration with time units, for example 2 hours or 30 min. |
`adv:Threads` | The number of threads to use. By default a connector uses up to five threads for synchronization. The connector might be able to synchronize with the repository in less time if you increase the value, but this places additional load on the repository because it must respond to more frequent requests. This property applies to all types of connector processors. | 5
`ATTR:name` | Adds a FlowFile attribute, with the specified `name`, to every FlowFile produced by the connector. |
`META:fieldname` | Adds a metadata field to every document produced by the connector. The field has the name `fieldname` and the value of the property. For example, to add a field named `SecurityType` to every document, set a property named `META:SecurityType`. |

To set an advanced property

1. Stop the connector, if it is running. To do this, right-click the processor and click Stop.

2. Right-click the processor and click Configure.

   The Configure Processor dialog box opens.

3. Click the Properties tab.

4. Click Add .

   The Add Property dialog box opens.

5. Type the name of the property that you want to add and click OK.
6. Set a value for the property.
7. Click APPLY.

To remove an advanced property, find it in the properties list and click the delete icon .

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