The Context Store Scale Out feature allows you to have a single-node deployment or add additional nodes to an existing multi-node deployment. With an increase in the number of nodes and resources associated with the nodes, you can maintain contexts for longer lease duration.
Note:
Context Store does not support scaling out dynamically. After adding a node to the cluster, you must shut down all the nodes and restart the nodes simultaneously.
By using the Scale Out feature, you can:
Deploy Context Store on one node only. In a single node deployment, load balancing is not enabled and therefore a cluster IP address is not required. Context Store uses the security module IP address of the node for traffic.
Deploy Context Store on a cluster of two to five nodes. Context Store supports high availability in this configuration.
Scale the clusters in Geo redundant deployments. Context Store clusters that are connected as part of a Geo deployment must contain the same number of nodes. All the nodes in both the clusters must have the same amount of memory. If a node is added to one cluster, a replica node must be added to the second cluster.
For high availability, Context Store supports a maximum of one failed node regardless of how many nodes are assigned to the cluster. To avoid service interruption, the remaining nodes must be able to support the throughput and capacity of the contribution of the failed node.
