Tag - spark

lite-log spark pyspark

Get the Current Spark Context Settings/Configurations

91   0   about 5 months ago

In Spark, there are a number of settings/configurations you can specify including application properties and runtime parameters. https://spark.apache.org/docs/latest/configuration.html Ge...

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lite-log spark pyspark hive

Read Data from Hive in Spark 1.x and 2.x

88   0   about 5 months ago

Spark 2.x Form Spark 2.0, you can use Spark session builder to enable Hive support directly. The following example (Python) shows how to implement it. from pyspark.sql import SparkSession appName = "PySpark Hive Example" master = "local" # Create Spark session with Hive...

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python spark pyspark

Data Partitioning in Spark (PySpark) In-depth Walkthrough

429   0   about 5 months ago

Data partitioning is critical to data processing performance especially for large volume of data processing in Spark. Partitions in Spark won’t span across nodes though one node can contains more than one partitions. When processing, Spark assigns one task for each partition and each worker threa...

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python lite-log spark pyspark

PySpark - Fix PermissionError: [WinError 5] Access is denied

441   0   about 6 months ago

When running pyspark or spark-submit command in Windows to execute python scripts, you may encounter the following error: PermissionError: [WinError 5] Access is denied As it’s self-explained, permissions are not setup correctly. To resolve this issue y...

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python spark pyspark hive

Spark - Save DataFrame to Hive Table

2,820   0   about 6 months ago

From Spark 2.0, you can easily read data from Hive data warehouse and also write/append new data to Hive tables. This page shows how to operate with Hive in Spark including: Create DataFrame from existing Hive table Save DataFrame to a new Hive table Append data ...

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sql server python spark pyspark

Connect to SQL Server in Spark (PySpark)

2,386   0   about 6 months ago

Spark is an analytics engine for big data processing. There are various ways to connect to a database in Spark. This page summarizes some of common approaches to connect to SQL Server using Python as programming language. ...

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python lite-log spark pyspark

Debug PySpark Code in Visual Studio Code

1,072   0   about 6 months ago

The page summarizes the steps required to run and debug PySpark (Spark for Python) in Visual Studio Code. Install Python and pip Install Python from the official website: https://...

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python spark pyspark

Implement SCD Type 2 Full Merge via Spark Data Frames

2,570   0   about 7 months ago

Overview For SQL developers that are familiar with SCD and merge statements, you may wonder how to implement the same in big data platforms, considering database or storages in Hadoop are not designed/optimised for record level updates and inserts. In this post, I’m going to demons...

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python spark

PySpark: Convert JSON String Column to Array of Object (StructType) in Data Frame

6,134   0   about 8 months ago

This post shows how to derive new column in a Spark data frame from a JSON array string column. I am running the code in Spark 2.2.1 though it is compatible with Spark 1.6.0 (with less JSON SQL functions). Prerequisites Refer to the following post to install Spark in Windows. ...

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zeppelin spark

Install Zeppelin 0.7.3 in Windows

3,650   6   about 2 years ago

This post summarizes the steps to install Zeppelin 0.7.3 in Windows environment. Tools and Environment GIT Bash Command Prompt Windows 10 Download Binary Package Download the latest binary package from the following website: ...

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