HPC IN THE CLOUD PERFORMANCE-RELATED ISSUES This section will discuss the issues linked to the adoption of the cloud paradigm in the HPC context. In particular, we will focus on three different issues 1. The difference between typical HPC paradigms and those of current cloud environments, especially in terms of performance evaluation. 2. A comparison of the two approaches in order to point out their advantages and drawbacks, as far as performance is concerned. 3. New performance evaluation techniques and tools to support HPC in cloud systems.