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# Schedule Synchronize Tasks

You can configure how often an IDOL NiFi Ingest Connector synchronizes with your data repository.

Most connectors support several types of synchronize task:

- Synchronize - The connector retrieves data from your repository so that it can be processed and indexed into an IDOL Content component. The connector retrieves new documents, updated documents, and a list of documents that have been deleted so that the IDOL index is kept up-to-date with the data source.
- Synchronize Groups - The connector retrieves security group information from the repository, in a format that can be sent to an IDOL OmniGroupServer, so that you can use mapped security to protect documents from being viewed by unauthorized users.
- Synchronize Identifiers - The connector retrieves only selected documents from the repository. You can route documents that were not processed successfully back to the connector; the connector uses their identifiers (a unique value that is assigned by the connector) to retrieve each of the failed documents again.

You might want to run these tasks on different schedules. For example, you might configure the connector to synchronize with the data repository once a day, but you might not want to wait until the following day to retry the failed documents.

To schedule synchronize tasks

1. Right-click the connector that you want to configure, and click Configure.

   The Configure Processor dialog box opens.

2. Click the Scheduling tab.
3. In the Scheduling Strategy box, click Timer driven.
4. In the Run Schedule box, specify the minimum interval between any type of synchronize task, for example `1 hour`. Ideally the value you set should be the largest common factor of the values you set in step 6.
5. Click the Properties tab.

6. Set the following properties to specify how often the connector performs each type of synchronize task. (Some connectors do not support synchronizing groups or synchronizing from identifiers. If a connector supports neither of those options, then none of the following properties are present and the synchronize schedule is specified by the value you entered in step 4).

   Synchronize Schedule | The amount of time between each synchronize cycle. For example, if you want to check for new, updated, and deleted documents every 24 hours, type `24 hours`.
   Synchronize Groups Schedule | This specifies how often the connector synchronizes security group information.
   Synchronize Identifiers Schedule | This specifies how often the connector retries failed documents. As the number of documents to process should be relatively low, you might want to run this task more frequently. For example, to retry failed documents every hour, type `1 hour`.

7. Click Apply.

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