Cloud computing Services Hadoop

1. Cloud: is a virtualization technology that weighs heavily on resource management.
2. Cloud Services is a business model of cloud computing, with three levels:
   1. Iaas: Off-site servers, storage and networking hardware, save on maintenance costs and office space, and companies can use these hardware at any time to run their applications
   2. Paas: Middleware, Virtual server and operating system;
   3. SaaS: Applications on any remote server can be run over the network, which is SaaS.
3. Cloud computing is a technology architecture for cloud services
   1. Distributed computing
   2. Parallel computing
   3. Grid computing
   4. Networked storage
4. Cloud security: With the advent of cloud computing, data security, virtualization security, endpoint security, application security
5. A man of three, a Hadoop three piles, Paas
   1. HDFs stores data, not afraid of failure
   2. Yarn cluster management and scheduling, the program hangs, yarn will help us restart
   3. MAPREDUCE data processing for improved computing power

Cloud computing Services Hadoop