# Monitor Amazon Data Lifecycle Manager pre and post scripts
Monitor pre and post scripts

**Amazon CloudWatch metrics**  
Amazon Data Lifecycle Manager publishes the following CloudWatch metrics when pre and post scripts fail and succeed and when VSS backups fail and succeed.
+ `PreScriptStarted`
+ `PreScriptCompleted`
+ `PreScriptFailed`
+ `PostScriptStarted`
+ `PostScriptCompleted`
+ `PostScriptFailed`
+ `VSSBackupStarted`
+ `VSSBackupCompleted`
+ `VSSBackupFailed`

For more information, see [Monitor Data Lifecycle Manager policies using CloudWatch](monitor-dlm-cw-metrics.md).

**Amazon EventBridge**  
Amazon Data Lifecycle Manager emits the following Amazon EventBridge event when a pre or post script is initiated, succeeds, or fails
+ `DLM Pre Post Script Notification`

For more information, see [Monitor Data Lifecycle Manager policies using EventBridge](monitor-cloudwatch-events.md).