i want to access hbase table from hadoop mapreduce....i m using windowsXP and cygwin
i m using hadoop-0.20.2 and hbase-0.92.0
hadoop cluster is working fine....i am able to run mapreduce wordcount successfully on 3 pc's
hbase is also working .....i can cerate table from shell
i have tried many examples but they are not working....when i try to compile it using
javac Example.java
it gives error..
MapR Technologies has announced at O’Reilly Strata Conference + Hadoop World 2012 that it is bringing Hadoop and NoSQL capabilities together on the HBase platform. With MapR M7, Big Data operations ranging from batch analytics to real-time database functions can be performed with enterprise-grade reliability and protection.
HBase stable
(http://apache.cs.utah.edu/hbase/stable/)
is currently hbase-0.90.4, what version(s) of HDFS is it compatible with?
I am following this tutorial.
http://hadoop.apache.org/docs/mapreduce/current/mapred_tutorial.html
javac -classpath ${HADOOP_HOME}/hadoop-core- ${HADOOP_VERSION}.jar:${HADOOP_HOME}/hadoop-mapred-${HADOOP_VERSION}.jar:${HADOOP_HOME}/hadoop-hdfs-${HADOOP_VERSION}.jar -d wordcount_classes
The hadoop version is 0.22.0 and this does not have a hadoop-core-0.22.0.jar though I find hadoop-hdfs-0.22.
Despite an error specified on Error of start of the demon of Namenode with a log of errors me it was succeeded to execute a command
./hadoop fs - mkdir/user/hadoop
and to create the appropriate folder (that the command confirmed ./hadoop fs - lsr/).
Talend's latest update includes the capability to profile the quality of data held on Hadoop-based systems, checking and integrating data on MongoDB, Cassandra and HBase and better validating addresses...
Talend's latest update includes the capability to profile the quality of data held on Hadoop-based systems, checking and integrating data on MongoDB, Cassandra and HBase and better validating
I'm trying to run hadoop unit tests using hadoop using MiniDFSCluster,MiniMRCluster and JUnit
however I'm getting this error:
WARNING: Metrics system not started: Cannot locate configuration: tried hadoop-metrics2-datanode.properties, hadoop-metrics2.properties
Dec 18, 2012 4:42:29 PM org.apache.hadoop.hdfs.server.datanode.DataNode makeInstance
WARNING: Invalid directory in dfs.data.dir: Incorre
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Quantcast, an internet audience measurement and ad targeting service, processes over 20 petabytes of data per day using Apache Hadoop and its own custom file system called Quantcast File System (QFS). Today, it’s making that technology available to as open source under an Apache license.