Programmer Think

1. Ambari Basic Architecture img016.jpg Ambari Server reads the configuration files for Stack and Service.When creating services with Ambari, Ambari Server passes configuration files for Stack and Service and control scripts for the service life cycle to Ambari Agent.When the Agent gets the configuration file, it downloads and installs the p ...

Hhase cluster deployment Software used hadoop-2.7.4 hbase-1.2.6 jdk-8u144 zookeeper-3.4.10 Hbase comes with zookeeper, where you use your own deployed zookeeper zookeeper cluster deployment Install jdk Download zookeeper program Modify zoo.cfg tickTime=2000 initLimit=10 syncLimit=5 dataLogDir=/zookeeper/logs dataDir=/zookeeper ...

prometheus monitoring system Recently, due to the company's need to build a large data platform, prometheus monitoring system has been replaced as required by consultants. prometheus official website: https://prometheus.io/ Personal understanding (not necessarily right): prometheus monitoring consists of three parts: prometheus (server), ex ...

1. Introduction to RPC RPC, fully known as Remote Procedure Call, or Remote Procedure Call, is a computer communication protocol.It allows remote services to be called as local services.It can be implemented in different ways.Examples include RMI (remote method call), Hessian, Http invoker, and so on.In addition, RPC is language independent.R ...

Collection (List And Set) 1. In practical development, it is necessary to store the objects used in specific data structure containers. JDK provides such a container-collection. 2.Collection is an interface whose sub-interfaces are List and Set 3. The difference between List and Set: List is an ordered repeatable set (which ca ...

http://www.cnblogs.com/xuwujing/p/8059079.html Introduction In the last article Big Data Learning Series IV - --- Hadoop+Hive Environment Construction Graphics and Text Details (stand-alone) And before Big Data Learning Series II - HBase Environment Construction (stand-alone) Hive and HBase environments were successfully built and teste ...

One preparation First create the folder with the following structure: weim@weim:~/myopt$ ls ubuntu1 ubuntu2 ubuntu3 And extract the downloaded JDK (version: 8u172), Hadoop (version: hadoop-2.9.1) into three folders, as follows: weim@weim:~/myopt$ ls ubuntu1 hadoop jdk weim@weim:~/myopt$ ls ubuntu2 hadoop jdk weim@weim:~/myopt$ ls ubuntu ...

overview 1. Cluster Planning 2. preparation 3. Modify the Hadoop configuration file 4. Copy content 5. Start the cluster 6. view jps 7. test 1. Cluster Planning HDFS HA Background There is a single point of failure (SPOF) in NameNode in HDFS cluster. For a cluster with only one NameNode, if an accident occurs on the NameNode ...