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access_time 4 days ago

In Hive, there are two types of tables can be created - internal and external table. Internal tables are also called managed tables. Different features are available to different types. This article lists some of the common differences.  Internal table By default, Hive creates ...

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Spark Read from SQL Server Source using Windows/Kerberos Authentication

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access_time 23 days ago

In this article, I am going to show you how to use JDBC Kerberos authentication to connect to SQL Server sources in Spark (PySpark). I will use  Kerberos connection with principal names and password directly that requires  ...

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Schema Merging (Evolution) with Parquet in Spark and Hive

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access_time 24 days ago

Schema evolution is supported by many frameworks or data serialization systems such as Avro, Orc, Protocol Buffer and Parquet. With schema evolution, one set of data can be stored in multiple files with different but compatible schema. In Spark, Parquet data source can detect and merge schema ...

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Kontext release v0.x

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access_time 28 days ago

Kontext release information before v.1.0.

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local_offer windows10 local_offer hadoop local_offer hdfs

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access_time 2 months ago

Issue When installing Hadoop 3.2.1 on Windows 10,  you may encounter the following error when trying to format HDFS  namnode: ERROR namenode.NameNode: Failed to start namenode. The error happens when running the following comm...

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Compile and Build Hadoop 3.2.1 on Windows 10 Guide

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access_time 2 months ago

This article provides detailed steps about how to compile and build Hadoop (incl. native libs) on Windows 10. The following guide is based on Hadoop release 3.2.1. ...

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Install Latest Hadoop 3.2.1 on Windows 10 Step by Step Guide

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access_time 2 months ago

This detailed step-by-step guide shows you how to install the latest Hadoop (v3.2.1) on Windows 10. It also provides a temporary fix for bug HDFS-14084 (java.lang.UnsupportedOperationException INFO).

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Kontext release v0.6.7

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access_time 2 months ago

Kontext v0.6.7 is now released with a few changes/enhancements. Changes The following sections list the new features/changes in release v0.6.7. Multi-la...

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Kontext release v0.6.6

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access_time 2 months ago

Kontext v0.6.6 is now released with a few changes/enhancements. Changes SEO enhancements Added a number of Facebook and twitter meta tags into head section of each page. Robots.txt is updated to make it simple. ...

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Machine Learning with .NET in Jupyter Notebooks

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access_time 2 months ago

In this article, I'm going to show you how to install Jupyter in Windows and then install .NET kernel for Jupyter notebooks. It also shows a machine learning example using ML.NET. The target audience are .NET developers who want to expand their skills in data engineering and science domain...

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