Synthetic Data  Generate data with specific data characteristics  Systematic evaluation w/ datasize, sparsity, etc  Inappropriate for certain topics: compression, ML accuracy  “Real” Data Repositories  0 [J. Sommer, M. Boehm, A. V. Evfimievski, B. Reinwald, P. J. Haas: MNC: Structure- Exploiting Sparsity Estimation for Matrix Expressions. SIGMOD 2019] 15 706.015 Introduction to Scientific Writing #Guidelines] [J. Sommer, M. Boehm, A. V. Evfimievski, B. Reinwald, P. J. Haas: MNC: Structure- Exploiting Sparsity Estimation for Matrix Expressions. SIGMOD 2019] 27 706.015 Introduction to Scientific Writing