system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What is the difference between ADLS Gen 1 and 2?


assistant
Azure Data Lake Storage Gen1 implements an access control model that derives from HDFS, which in turn derives from the POSIX access control model. Azure Data Lake Storage Gen2 implements an access control model that supports both Azure role-based access control (Azure RBAC) and POSIX-like access control lists (ACLs).