This 5-minute video features executives from Red Hat and Intel talking about the companies' joint efforts to deliver real business value for cloud computing. Jim Totton is VP of the RHEL Business Unit at Red Hat, and Jason Waxman is the GM of Cloud Infrastructure at Intel's Data Center Group.
（1）创建hadoop用户组：sudo addgroup hadoop
（2）创建hadoo用户：sudo adduser -ingroup hadoop hadoop
Applications in data centers process huge workloads every day. Many of them are CPU intensive, disk I/O intensive, network I/O intensive or a combination thereof. Maintaining a data center is challenging because the amount of work being run, and data being processed is getting larger, which may result in bottlenecks. When an application has a bottleneck (either CPU, disk I/O or network), the effects may result in degradation of the whole system’s performance.