Externalized OpenCDS configuration options are stored in the locations below:

If running as a non-system user:
%HOME%\.opencds\opencds.properties

If running as the system user:

C:\Windows\System32\config\systemprofile\.opencds\opencds.properties

This file must contain the first three lines below. The fourth and fifth lines are optional.

knowledge-repository.type=<repository type>
knowledge-repository.path=<repository path>
config.security=<path to security config file>
log4j.logfile=<full path to log file>
km.threads=4

knowledge-repository.type may be one of the three following values:
- STORE
- SIMPLE_FILE
- CLASSPATH
knowledge-repository.path is the absolute or relative path to the configuration, depending upon which type is chosen (above).
- Example configurations for SIMPLE_FILE may include:
  - C:/opencds/opencds-knowledge-repository-data/resources_v1.3
  - C:/opencds-knowledge-repository-data/resources_v1.3
  - etc.
- The path for the CLASSPATH type is relative to the classpath of the running JVM (e.g., Tomcat).
  - resources_v1.3
config.security is the location of the security configuration for the REST services.
- For an example configuration, see: REST Security
log4j.logfile is the location used by OpenCDS to write the logs. This line is optional. Typical values may include:
- C:/opencds/opencds.log
- etc.
km.threads is the number of threads per knowledge module.
- This can increase throughput of the system, depending upon the number of rules being run for each request.
- Best practice shows that the number of km.threads should be kept to the same number of CPUs (or CPU cores).

PLEASE NOTE: The paths provided in opencds.properties on a Windows-based system must have either (1) all back-slashes escaped or (2) forward-slashes in place of back-slashes, otherwise the system will not start properly. For example, if your repository path is at the root folder in C:, e.g., C:\opencds-kr\resourceAttributes, the path configured for knowledge-repository.path must be either C:\\opencds-kr\\resourcesAttributes or C:/opencds-kr/resourcesAttributes (note the forward-slashes).

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