I am listening carefully to the necessary technologies for using big data. It is one of the difficult fields, but thanks to the good explanation, my understanding of the cluster environment has improved. I think it is different from other lectures because there is a part about building. I am also taking the pipeline class, and I am really grateful that you introduce various technologies and explain them well so that I can use them right away. Thanks to you, I am interested in AWS, create storage, and create EC2 to receive the necessary resources for free. Thank you~