Having a single ILM Tomcat engine puts a limit on the resources, such as the number of threads and heap space, that Data Archive can use. To maximize resources, you can install multiple Tomcat engines that point to the same ILM repository. This configuration allows you to have the maximum number of extracts (Copy to Destination) running at the same time on the same machine. However, this configuration also presents the challenge of keeping track of which engine is running each job.