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Output OperationMeaning print() Prints the first ten elements of every batch of data in a DStream on the driver node running the streaming application 阅读全文
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A more efficient version of the above reduceByKeyAndWindow() where the reduce value of each window is calculated incrementally using the reduce values 阅读全文
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TransformationMeaning map(func) Return a new DStream by passing each element of the source DStream through a function func. flatMap(func) Similar to m 阅读全文
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1. 安装 [root@master ~]# yum list |grep telnet telnet-server.x86_64 1:0.17-59.el7 @base telnet.x86_64 1:0.17-59.el7 base [root@master ~]# yum install te 阅读全文