# Tasks

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This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/aws-dms-user-guide.git)
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## Continuous replication tasks

* **Note**\
  You can migrate views using full-load tasks only. If your task is either a CDC-only task or a full-load task that starts CDC after it completes, the migration includes only tables from the source. Using a full-load-only task, you can migrate views or a combination of tables and views. For more information, see [Specifying table selection and transformations rules using JSON](https://github.com/kevinslin/aws-reference-notes/blob/main/services/aws_database_migration_service/CHAP_Tasks.CustomizingTasks.TableMapping.SelectionTransformation.md).
* **Note**\
  AWS DMS bidirectional replication isn't intended as a full multi-master solution including a primary node, conflict resolution, and so on.
* **Note**\
  Only one task in a bidirectional pair can be full load and CDC.
* **Note**\
  When using the AWS CLI, use only the `create-replication-task` or `modify-replication-task` commands to configure `LoopbackPreventionSettings` in your bidirectional replications tasks.

## Moving a task

* **Note**\
  You can't move a task to the same replication instance where it currently resides. You can't modify the settings of a task while it's moving. A task you have run must have a status of **Stopped**, **Failed**, or **Failed-move** before you can move it.

## Table mapping

* **Note**\
  When working with table mapping for a MongoDB source endpoint, you can use filters to specify data that you want replicated, and specify a database name in place of the `schema_name`. Or, you can use the default `"%"`.

## Enabling and working with premigration assessments

* **Note**\
  If you do a premigration assessment run that includes the data type assessment, you don't need to do a data type assessment separately.