OSB
Oracle® Fusion Middleware Concepts and Architecture for Oracle Service Bus 12c Release 2 (12.2.1) https://docs.oracle.com/middleware/12211/osb/develop/GUID-2CFA406F-66DF-44F1-894B-CFD7EC66CEB1.htm#OSBDV87909
Oracle® Fusion Middleware Administrator's Guide for Oracle Service Bus 12c Release 2 (12.2.1)
https://docs.oracle.com/middleware/12211/osb/administer/ GUID-8C1FA6EB-B602-40FF-A860-8C0EA65660B1.htm#OSBAG1437
WebLogic
Oracle® Fusion Middleware Using Clusters for Oracle WebLogic Server 12c Release 2 (12.2.1)
https://docs.oracle.com/middleware/12211/wls/INTRO/clustering.htm#INTRO185
Oracle® Fusion Middleware Introducing Web Services 12c Release 2 (12.2.1)
https://docs.oracle.com/middleware/1221/owsm/WSINT/wsintro.htm#WSINT143
Oracle® Fusion Middleware Performance and Tuning for Oracle WebLogic Server 12c Release 2 (12.2.1)
https://docs.oracle.com/middleware/1221/wls/PERFM.pdf