官网中对Kerberos的介绍是“Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography”。也就是说Kerberos是一个网络授权协议,主要通过密钥加密实现C/S应用的强授权。
官网定义:Apache ZooKeeper is an effort to develop and maintain an open-source server which enables highly reliable distributed coordination.
Spark on Yarn模式中,我们可以通过spark.yarn.jars和spark.yarn.archive预置spark jars到HDFS中,当提交spark任务时,就不需要把${SPARK_HOME}/jars目录下的jar包上传到hdfs中,可以大大降低spark任务提交过程耗时。