# Monitoring ## Data Watcher ### One-to-one M2F In Data Watcher, the flow displayed shows the file entering Data One via an SFTP push, and the messages exiting via a JMS push.

In the **Trace** section of the **Node Details**, you can find useful information such as the number of messages (see the numberOfMessages field). A value of 1 indicates that the file was created by aggregating only one message and that the one-to-one aggregation policy was applied.

### Many-to-one M2F In the case of many-to-one, the flow displayed shows the JMS push of the file to Data One:

In the **Trace** section of the **Node Details**, you can find useful information such as the number of messages (see the numberOfMessages field). A value of 3 indicates that the file was created by aggregating 3 messages, and that the many-to-one aggregation policy was applied.

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