8.3 Test configuration All tests were done using one to three LPARs in a sysplex. These LPARs were on a single z10 processor, along with the two CF LPARs. All LPARs were using dedicated engines. IMS Version 10 was used for measurements, running under either z/OS 1.9 or 1.10. Depending on the measurement, either one, two, or three IMS subsystems were brought up. IMS was always in data-sharing mode, using the IRLM with databases registered as SHARELVL=3, even if only one IMS was active. Most measurements were done with IMS shared message queues, except where comparisons were made with a private queue environment. Up to 200 dependent regions were activated on each IMS. More than 5,000 each of databases, applications, and transactions were defined. The IMS Structured Call Interface (SCI) and Operations Manager (OM) functions were active. Figure 8-1 shows the basic configuration. The SCI, OM, and dependent regions are omitted for clarity. IMS Configuration SMQ SEMH