Devices push Historical Data Records (HDR) data to the Management Cloud Engine(s) (MCEs) in standard CSV format. The data is stored in the /opt/oracle/mce/hdrData directory on the MCEs, which act as the push receivers.

A push receiver is an SFTP destination server that receives the HDR records. The device establishes an SFTP connection to the push receiver(s) and transfers the CSV files.

Devices that are managed by multiple MCEs send HDR data to each associated MCE. The Oracle® Session Delivery Management Cloud (Oracle SDM Cloud) periodically monitors the push receiver directory, processing the HDR files used to generate reports and analytics.

If a Network Function (NF) is deleted from the Oracle SDM Cloud, users must stop the device's HDR sampling and pushing. To do this, access the device's CLI and execute the request collection stop all command.

Oracle SDM Cloud retains the removed NF’s HDR data for 14 days. During this period, the NF can be re-added to Oracle SDM Cloud without losing HDR data. After 14 days, the NF’s HDR data is purged.