4.2.1 The Details Panel

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Click the Details navigation bar to open the Details panel (shown in Figure 4.5).
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Figure 4.5 - The Details panel on the Clusters tab.
The left pane of the Details panel displays information about the currently selected cluster:
You can use controls on the Details panel to specify:
When you modify the settings on the Details panel, EDB Ark displays a New value saved notice, confirming that the change has been saved.
Deselect the 모니터링 Load Balancer Health checkbox to indicate that you do not wish for load balancer health to be monitored and automatically restarted if an interruption in service is detected.
By default, the 모니터링 데이터베이스 Health checkbox is checked, indicating that EDB Ark is monitoring the health of the database to ensure that service is not interrupted. If the state of the database server changes to any state other than running while 모니터링 데이터베이스 Health is checked, Ark will attempt to restart the database.
Uncheck the 모니터링 데이터베이스 Health checkbox to instruct Ark to not automatically restart the database if the database stops.
Use the Cluster healing mode radio buttons to specify the type of failover that should be employed:
Select the Replace failed master with a new master radio button to specify that the cluster manager should create a new master to replace a failed master node.
Select the Replace failed master with existing replica radio button to specify that the cluster manager should promote a replica node to be the new master node for the cluster.
Use the Auto-Scaling Thresholds controls on the Details panel to adjust the threshold at which EDB Ark automatically scales up cluster resources. For more information about using the controls, see Section 10.1, Adjusting the Automatic Scaling Thresholds.
Use the fields in the Backup Settings box to change your backup preferences for the selected cluster:
Use the Backup Window drop-down listbox to select an optimal time to process cluster backups; specify a time when the number of clients accessing the database is minimal.
Use the Backup Retention field to specify the number of backups that should be stored for the selected cluster.
Select the checkbox next to Continuous Archiving (Point-in-Time Recovery) to enable point-in-time recovery for a cluster. When enabled, a base backup is automatically performed that can to be used to restore to a specific point in time. All subsequent automatic scheduled backups will also support point-in-time recovery. Note that if you deselect this option, the cluster (and subsequent automatic backups) will be re-configured to not include support for point-in-time recovery.
When point-in-time recovery is enabled, the value specified in the Backup Retention field determines the duration of the point-in-time recovery backup window. For example, if you specify a value of 7, the backup window will be 7 calendar days long. When the backup retention threshold is reached, the oldest base backup is removed, as well as any WAL files required to perform a recovery with that backup.
The DNSNAME table (located on the right side of the Details panel) contains a status overview and connection information for the selected cluster. If you have created replicas, the secondary server nodes are listed below the master node in the tree control; expand the tree control to view the status of the replication nodes.
Status indicators on the Clusters tab provide quick visual feedback about the status of your cluster:
Use the drop-down tab in the upper-right corner of the DNSNAME pane to select the columns that will be displayed in the panel:
The AZ column displays the Availability Zone in which the cluster resides.
The SUBNET column displays the subnet ID on which the cluster resides.
The LBPORT column displays the port number to which a client application should connect to utilize load balancing.
The DBPORT column displays the default listener port for the Advanced Server or PostgreSQL server.
The CXN column displays the current number of connections to the node.
The VM column displays the state of the virtual machine on which the cluster resides.
The HA column displays the state of the high-availability cluster.
The DB column displays the state of the database server.
The UP column displays the current status of the packages installed on the cluster. Periodically, the cluster manager performs a check to see if the packages are up to date. If an update becomes available, the UP column will display a yellow alert symbol if the update is non-critical, or a red error symbol if the update is a critical (security) alert.
If alerted to an out-of-date package, you can use the Upgrade icon to invoke a yum update to update the package on all of the nodes on your cluster.


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