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access_time 11 months ago

This page summarizes the installation guides about big data tools on Windows through Windows Subsystem for Linux (WSL). ...

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access_time 11 months ago

Previously, I demonstrated how to configured Apache Hive 3.0.0 on Windows 10. Apache Hive 3.0.0 Installation on Windows 10 Step by Step Guide...

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access_time 11 months ago

In my previous post , I showed how to configure a single node Hadoop instance on Windows 10. The steps are not too difficult to follow if you have Java programming backgr...

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access_time 2 years ago

Copy file from HDFS to local Use the following command: hadoop fs [-copyToLocal [-f] [-p] [-ignoreCrc] [-crc] <src> ... <localdst>] For example, copy a file from /hdfs-file.txt in HDFS to local /tmp/ using the following command: ...

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Solution to fix the issue If you have been running Hadoop on Windows machines, you may encounter issues about unhealthy data nodes. Usually this will happen if there is no enough disk space in your local drive. For example, if I start the HDFS and YARN demons under the context...

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access_time 2 years ago

If you have been following my website, you would know I’ve published a number of articles about installing big data tools/framewo...

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access_time 2 years ago

In Sqoop, there are multiple approaches to pass in passwords for RDBMS. Options Option 1 - clear password through --password argument sqoop [subcommand] --username user --password pwd This is the weakest approach as password is exposed directly...

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access_time 2 years ago

In Safe Mode, the HDFS cluster is read-only. After completion of block replication maintenance activity, the name node leaves safe mode automatically. If you try to delete files in safe mode, the following exception may raise: org.apache.hadoop.ipc.RemoteException(org.apac...

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access_time 2 years ago

When configuring YARN and MapReduce in Hadoop cluster, it is very important to configure the memory and virtual processors correctly. If the configurations are incorrect, the nodes may not be able to start properly and the applications may not be able to run successfully. For example...

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access_time 2 years ago

This page continues with the following documentation about configuring a Hadoop multi-nodes cluster via adding a new edge node to configure administration or client tools. ...

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