The correct answer is Configuration File Path . When the same application can be installed more than once on the same server, the identification rule must use an attribute that can distinguish one installed instance from another. Configuration File Path is stronger than file name because the same file name can exist in multiple installation directories. It is also stronger than version because multiple instances may run the same version.
Port can help in some cases, but ports may be reused, changed, or not consistently available for every application pattern. Class is too broad because it only identifies the type of CI, not the specific application instance. A path-based criterion is more precise because it identifies where that application instance is installed on the server. Therefore, Configuration File Path is the best criterion attribute for preventing incorrect matches between multiple instances.
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