This figure is similar to and is a companion of the previous cold cluster failover figure, because this figure illustrates the same multi-instance, clustered architecture after a failover has occurred.
Starting at the top of the figure, two servers are in a box (outlined with a dotted line) that is labeled "Application/Web Servers." To the left of the servers is another label: "Applications and Web Servers Managed with Oracle Clusterware API." Bothservers are connected to another box labeled "Oracle Net Services Client Access" and this box shows separate connections to two nodes:
Node 1 is not in a box and is outlined with a dotted line and crossed out with an X to indicate that this node and instance are in standby mode. The node is not actively servicing application requests for this database.
Node 2 is in an orange box and is also connected by a line to the "Pool of Storage" below, to indicate that the instance is actively servicing database requests from the applications.
To the left of the nodes is another label: "Single-Instance Oracle Database Made Highly Available with Oracle Clusterware." A dotted line runs between Node 1 to Node 2 to indicate a heartbeat connection between the nodes.
At the bottom of the figure, directly below the nodes is a single a row of disks with the label "Pool of Storage." The six disks in the pool of storage are contained in a dotted-line box. Within this dotted-line box, the two leftmost disks are labeled "Database Area" and the four disks to right are labeled "Fast Recovery Area."