This session first explains the benefits of using LU (Live Update). I will describe the importance of applying security patches and fixes and regulations for a Dutch bank. After this I will short explain how this technology helps us to minimize the impact on availability. The biggest part of this session will be about explaining how this technology works. After this I will explain the differences between AIX 7.2 and AIX 7.3 TL03 and beyond. I explain how new improvements such as Live Library Updates will mitigate the need of restarting (parts) of applications. Also subjects such as adjusting LPAR profiles and IP-sec migrations during a LU will be covered. Of course I will show practical examples how to achieve LU run without failures, and how to recover from these failures.