Can some explain the Hadoop stack to me? - Stack Overflow
2011年12月15日 — Hadoop ecosystem is growing at a very fast pace. There are open source (like Cloudera)/commercial (like MapR) softwares. Start with the Hadoop ecosystem world map and go to the next level as required. The article is a bit outdated, but is relevant.
What is "Hadoop" - the definition of Hadoop? - Stack Overflow
Hadoop is not a stack like LAMP or MEAN stack. Hadoop is a collections of frameworks and tools that work togethor to solve complex big data problems. It is basically a Project under Apache foundation. Various Subprojects like Mapreduce, Ambari, Sqoop, Spark, Zookeeper, etc togethor makes ,what is called a Hadoop Ecosystem.
When to use Hadoop, HBase, Hive and Pig? - Stack Overflow
Versions of Hadoop. There are two versions of Hadoop available : Hadoop 1.0; Hadoop 2.0; Hadoop 1.0. It has two main parts : 1. Data Storage Framework. It is a general-purpose file system called Hadoop Distributed File System (HDFS). HDFS is schema-less. It simply stores data files and these data files can be in just about any format.
What is best way to start and stop hadoop ecosystem ... - Stack …
2013年7月10日 — hadoop-daemon.sh namenode/datanode and yarn-deamon.sh resourcemanager : To start individual daemons on an individual machine manually. You need to go to a particular node and issue these commands. Use case : Suppose you have added a new DN to your cluster and you need to start the DN daemon only on this machine, bin/hadoop-daemon.sh start datanode
Hadoop - Restart datanode and tasktracker - Stack Overflow
2013年11月26日 — ./hadoop-daemon.sh stop tasktracker ./hadoop-daemon.sh stop datanode So this script checks for slaves file in conf directory of hadoop to stop the DataNodes and same with the TaskTracker. To start. Again this script checks for slaves file in conf directory of hadoop to start the DataNodes and TaskTrackers.
http://localhost:9870 does not work HADOOP - Stack Overflow
2018年4月8日 — First, you need to check you Hadoop daemons are running by entering the command: jps. Here my namenode is also configured as datanode. Second, check Namenode Java Process is running with 9870 port or not by entering the command. netstat -an | grep 9870 Third, check dfs.namenode.http-address property in hdfs-site.xml
java - Hadoop Distribution Differences - Stack Overflow
2013年7月24日 — Can somebody outline the various differences between the various Hadoop Distributions available: Cloudera ...
Hadoop - java.net.ConnectException: Connection refused - Stack …
2015年4月28日 — I want connect to hdfs (in localhost) and i have a error: Call From despubuntu-ThinkPad-E420/127.0.1.1 to localhost:54310 failed on connection exception: java.net.ConnectException: Connection refu...
Datanode process not running in Hadoop - Stack Overflow
2012年8月10日 — I set up and configured a multi-node Hadoop cluster using this tutorial. When I type in the start-all.sh command, it shows all the processes initializing properly as follows: starting namenode, l...
Newest 'hadoop' Questions - Stack Overflow
Stack Overflow for Teams Where ... given a folder structure in hadoop which is the location of the files ...