Pro Microsoft HDInsight Hadoop on Windows


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Hadoop on Windows

Hive is probably the most used tool in the Hadoop ecosystem. To work with Hadoop data, you need to write MapReduce jobs that are not convenient for ad hoc queries. Hive comes to the rescue by providing a SQL-like query language, which internally transforms the query to MapReduce jobs.

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Hive can work with structured and semi-structured data. Internally, it uses MapReduce, Tez, or the Spark execution engine. Apache Pig is a platform to analyze large data sets using a procedural language known as Pig Latin. One of the challenges with MapReduce is that to represent complex processing, you have to create multiple MapReduce operations and then chain them together to achieve the desired result, which is not easy or maintainable when requirements change very often. Instead, you can use Pig, which represents transformations as a data flow. You can write different transformations, one after another, to achieve the desired result.

Microsoft: HDInsight and Hadoop

Apache Pig is mainly used in data manipulation operations, because it is easier to write in Pig Latin than to write basic MapReduce jobs in Java. Pig Latin is the language used by Pig to write procedures to do transformations. Pig Latin procedures usually consist of one or more operations, such as loading data from a file system, manipulating it, and storing the output for processing or dumping it on a screen. Previous chapters explored how to leverage an HDInsight cluster to store and process big data.

You learned how MapReduce jobs process data. Also, you looked at Hive and Pig, and learned how they make it easy to work with data.

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All the technologies and tools that you saw so far work in batch mode. And they are accepted in online analytical processing OLAP scenarios where it is supposed to take time. But you cannot always use batch processing. This is where Apache HBase comes into the picture.

Using Windows Azure HDInsight Emulator - Pro Microsoft HDInsight: Hadoop on Windows - page

Batch processing is used with data at rest. You typically generate a report at the end of the day. MapReduce, Hive, and HBase all help in implementing batch processing tasks. But there is another kind of data, which is in constant motion, called streams. To process such data, you need a real-time processing engine. A constant stream of click data for a campaign, user activity data, server logs, IoT, and sensor data—in all of these scenarios, data is constantly coming in and you need to process them in real time, perhaps within a window of time.

Apache Storm is very well suited for real-time stream analytics. Storm is a distributed, fault-tolerant, open source computation system that processes data in real time and works on top of Hadoop. Apache Spark changed the landscape of big data and analytics when it came out. Developers welcomed it like nothing else.

It quickly became the superstar from ascendant technology. Required for an Update Strategy transformation in a mapping that writes to a Hive target. Set to: TRUE hive. Set to: 1 hive. Applicable for Hive versions 0. Required for the Update Strategy transformation in a mapping that writes to a Hive target. Also required if you use Sqoop and define a DDL query to create or replace a partitioned Hive target at run time.

Set to: nonstrict hive.


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Required for HiveServer2 high availability. Comma-separated list of ZooKeeper server host:ports in a cluster. Configure the following properties in the yarn-site. Set the maximum memory on the cluster to increase resource memory available to the Blaze engine. Set to 16 GB if value is less than 16 GB.


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Required for Blaze engine resource allocation. Set to 10 if the value is less than Set to 6 GB if the value is less than 6 GB. Required for the Blaze and Spark engines. YarnShuffleService yarn. Set to: TRUE yarn. Configure the following properties in the tez-site. Required when the output needs to be sorted for Blaze and Spark engines. Set value to MB.

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Updated January 28, Download this guide. Explore Informatica Network. Knowledge Base.

Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows
Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows
Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows
Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows
Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows
Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows
Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows
Pro Microsoft HDInsight  Hadoop on Windows Pro Microsoft HDInsight Hadoop on Windows

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