Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. IBM WebSphere Optimized Local Adapters (OLA or WOLA) is a functional component of IBM''s WebSphere Application Server for z/OS that provides a highly efficient cross-memory mechanism for calls both inbound to WAS z/OS and outbound from z/OS. It was first made available as part of the 7.0.0.4 maintenance release for WAS z/OS Version 7. Because it avoids the overhead of other communication mechanisms, it is capable of high volume exchange of messages.