Apache Spark is a fast and general engine for large-scale data processing.
1、Speed 高运行速度
Run programs up to 100x faster than Hadoop MapReduce in memory,or 10x faster on disk.
2、Ease of use 易用性
Spark offers over 80 high-level operators that make it easy to build parallel apps. And you can use it interactively from the Scala and Python shells.
3、Generality 一栈式，通用性
Spark powers a stack of high-level tools including Spark SQL,MLlib for machine learning, GraphX, and Spark Streaming. You can combine these libraries seamlessly in the same application.
4、Runs Everywhere 各处运行
Spark runs on Hadoop, Mesos, standalone, or in the cloud. It can access diverse data sources including HDFS, Cassandra, HBase, S3.
