## 8.4.1  Monitoring SAP HANA System Replication with the SAP HANA Cockpit
To monitor SAP HANA system replication, you can use the System Replication tile in the SAP HANA cockpit.
To open the System Replication Overview page, click the System Replication tile on the Overview page in the SAP HANA cockpit.
The System Replication Overview displays a graphical representation of the system replication landscape with the following information:
- The name and role of the system, as well as the selected operation mode For the operation modes logreplay and logreplay\_readaccess a retention time estimation is also marked log segments and a full data shipping becomes necessary to is an estimation of the time left before the primary system runs into a log full. The value shown in the
displayed. The Estimated log retention time is an estimation of the time left before the primary system starts to overwrite the RetainedFree get the primary and secondary systems back in sync after a disconnect situation. The Estimated log full time header shows the situation into which the system could run first: log retention or log full.
- If the SQL ports of the secondary system are open for read access
- The replication mode used between the systems
- The current average redo log shipping time and the average size of shipped redo log buffers
It describes how long it took on average to send redo log buffers to the secondary site based on measurements of the last 24 hours.
Furthermore, detailed information on system replication is provided in the following tabs:
##  Note
These tabs are displayed only if you configured a system replication before.
Tabs on the System Replication Overview
| Tab Name                  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|---------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Related Alerts            | The Related Alerts tab provides a description of any existing alerts, as well as their priority. This tab is only displayed when system replication related alerts are availa­ ble.                                                                                                                                                                                                                                                                                                                               |
| Replicated Services       | The Replicated Services tab provides information on the replication status per site and service.                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Network                   | The Network tab provides information on the time it took to ship the redo log to the secondary system and to write the redo log to the local log volume on disk. You can select the network connection that you want to analyze (for example, Network Site 1 to 2 or Network Site 2 to 3 ). The graph displayed compares the local write wait time with the remote write wait time monitored over the last 24 hours.                                                                                             |
| Log Shipping Backlog      | The Log Shipping Backlog tab provides a graphical representation on the history of the log shipping backlog.                                                                                                                                                                                                                                                                                                                                                                                                     |
| Log Replay                | The Log Replay tab provides a graphical representation on the delay of the secon­ dary system. This tab is displayed if the chosen operation mode for the system repli­ cation landscape is logreplay or logreplay_readaccess . When this tab is activated for a secondary system, the log replay delay is shown for the last 24 hours. Furthermore, in this tab you can select to visualize the estimated log retention time as well as the estimated log full time for all system replication relevant services. |
| Network Speed Check       | The Network Speed Check tab provides a way to measure the network speed of the system replication host-to-host network channel mappings.                                                                                                                                                                                                                                                                                                                                                                         |
| Network Security Settings | The Network Security Settings tab displays the specific network security details con­ figured between the primary and the secondary systems.                                                                                                                                                                                                                                                                                                                                                                      |