To answer this question, we need to understand what node cluster architecture is.
Node cluster architecture refers to the setup of multiple servers or nodes that work together as a cluster to handle the processing and workload of a particular application or system. In this architecture, the iProcess Engine is installed on multiple servers, but they all use the same database instance.
Now, let's go through each option to determine the correct answer:
Option A) Installing the iProcess Engine on one server that uses multiple database instances - This option is incorrect because it does not match the definition of node cluster architecture. In this setup, there is only one server and multiple database instances, which does not involve multiple servers working together as a cluster.
Option B) Installing the iProcess Engine on multiple servers that use one same database instance - This option is correct. It aligns with the definition of node cluster architecture, where multiple servers work together as a cluster, but all of them use the same database instance.
Option C) Installing the iProcess Engine on multiple servers that use multiple database instances - This option is incorrect because it involves multiple database instances. In node cluster architecture, all servers use the same database instance.
Option D) All of the above - This option is incorrect because option A and option C do not match the definition of node cluster architecture.
Therefore, the correct answer is option B) Installing the iProcess Engine on multiple servers that use one same database instance.