Hive Data Warehouse

Author: g | 2025-04-24

Is Hive A Data Warehouse. What is Apache Hive? Two other common questions connected with Apache Hive are: 1) Is Hive a Data Warehouse? and 2) Is Hive A Is Hive A Data Warehouse. What is Apache Hive? Two other common questions connected with Apache Hive are: 1) Is Hive a Data Warehouse? and 2) Is Hive A database? . The answer to the second question is no. Hive is not a database but rather a data warehouse system built on top of Hadoop.

DATA WAREHOUSE : Hive!. Hive is an ETL and Data warehousing

You can download diagnostic bundles for troubleshooting a Hive Virtual Warehouse in Cloudera Data Warehouse (CDW) Private Cloud. The diagnostic bundles contain log files for the sidecar containers that support Hive components and for the components themselves. These diagnostic bundles are stored on HDFS in the form of ZIP files. The log files are generated when you run some workloads on your Hive Virtual Warehouse. Log in to the Data Warehouse service as a DWAdmin. Go to a Hive Virtual Warehouse and click . The options for generating the diagnostic bundles are displayed as shown in the following image: Select the time period for which you want to generate the logs. Select the By Time Range option to generate logs from last 30 minutes, one hour, 12 hours, or 24 hours. Select By Custom Time Interval option to generate logs for a specific time period based on your requirement. Select the categories for which you want to generate the logs by selecting the options from the Collect For section. By default, ERRORDUMP, GCLOG, HEAPDUMP, HMS, LOGS, CRINFO, K8S-RESOURCE-INFO are selected. Click X to remove the ones you do not need. ERRORDUMP contains exceptions from the containers CGLOG contains JVM garbage collector-related logs HEAPDUMP contains JVM heapdump HMS contains sidecar container logs that support the metastore LOGS contains logs of Hive, Coordinator, and Executor processes and their supporting containers Optional: Select the Run even if there is an existing job option to trigger another diagnostic bundle creation when one job is running. Click Collect. The following message is displayed: Collection of Diagnostic Bundle for compute-1651060643-c97l initiated. Please go to details page for more information. Go to the Virtual Warehouses details page by clicking . Go to the DIAGNOSTIC BUNDLE tab. The jobs that have been triggered for generating the diagnostic bundles are displayed, as shown in the following image: Click on the link in the Location column to download the diagnostic bundle to your computer.

HIVE A Data Warehouse in HADOOP

Microsoft SQL Server Analysis Services and Cloudera Impala. LDAP for Tableau Server on Linux.Virtual environmentsCitrix environments, Microsoft Hyper-V, Parallels, VMware (including vMotion), Amazon Web Services, Google Cloud Platform and Microsoft Azure.All Tableau products operate in virtualised environments when they are configured with the proper underlying operating system and minimum hardware requirements. CPUs must support SSE4.2 and POPCNT instruction sets so any processor compatibility mode must be disabled. We recommend VM deployments with dedicated CPU affinity.InternationalisationThe user interface and supporting documentation are in English (US), English (UK), French (France), French (Canada), German, Italian, Spanish, Brazilian Portuguese, Swedish, Japanese, Korean, Traditional Chinese, Simplified Chinese and Thai. Tableau Server data sources Connect to hundreds of data sources with Tableau Server. Actian Vectorwise Alibaba AnalyticDB for MySQL Alibaba Data Lake Analytics Alibaba MaxCompute Amazon Athena Amazon Aurora Amazon Elastic MapReduce Amazon Redshift Anaplan Apache Drill Box Cloudera Hadoop Hive and Impala; Hive CDH3u1, which includes Hive .71, or later; Impala 1.0 or later Databricks Datorama Denodo Dropbox ESRI ArcGIS EXASOL 4.2 or later for Windows Firebird Google Analytics Google BigQuery Google Cloud SQL Google Drive Hortonworks Hadoop Hive HP Vertica IBM BigInsights* IBM DB2 IBM PDA Netezza Impala JSON files Kognitio* Kyvos LinkedIn Sales Navigator MariaDB Marketo MarkLogic SingleStore (MemSQL) Microsoft Access 2007 or later* Microsoft Azure Data Lake Gen 2 Microsoft Azure SQL DB Microsoft Azure Synapse Microsoft Excel Microsoft OneDrive and SharePoint Online Microsoft SharePoint lists Microsoft Spark on HDInsight Microsoft SQL Server Microsoft SQL Server Analysis Services MonetDB* MongoDB BI MySQL OData Oracle database Oracle Eloqua Oracle Essbase PDF Pivotal Greenplum PostgreSQL Presto Progress OpenEdge Qubole QuickBooks Online Salesforce.com, including Force.com and Database.com SAP HANA SAP NetWeaver Business Warehouse* SAP Sybase ASE* SAP Sybase IQ* ServiceNow Snowflake Spark SQL Spatial files (ESRI shapefiles, KML, GeoJSON and MapInfo file types) Splunk Enterprise

HDFS to Hive Data transfer: Building a HIVE Data Warehouse

What is Impala?Impala is a MPP (Massive Parallel Processing) SQL query engine for processing huge volumes of data that is stored in Hadoop cluster. It is an open source software which is written in C++ and Java. It provides high performance and low latency compared to other SQL engines for Hadoop.In other words, Impala is the highest performing SQL engine (giving RDBMS-like experience) which provides the fastest way to access data that is stored in Hadoop Distributed File System.Why Impala?Impala combines the SQL support and multi-user performance of a traditional analytic database with the scalability and flexibility of Apache Hadoop, by utilizing standard components such as HDFS, HBase, Metastore, YARN, and Sentry.With Impala, users can communicate with HDFS or HBase using SQL queries in a faster way compared to other SQL engines like Hive.Impala can read almost all the file formats such as Parquet, Avro, RCFile used by Hadoop.Impala uses the same metadata, SQL syntax (Hive SQL), ODBC driver, and user interface (Hue Beeswax) as Apache Hive, providing a familiar and unified platform for batch-oriented or real-time queries.Unlike Apache Hive, Impala is not based on MapReduce algorithms. It implements a distributed architecture based on daemon processes that are responsible for all the aspects of query execution that run on the same machines.Thus, it reduces the latency of utilizing MapReduce and this makes Impala faster than Apache Hive.Advantages of ImpalaHere is a list of some noted advantages of Cloudera Impala.Using impala, you can process data that is stored in HDFS at lightning-fast speed with traditional SQL knowledge.Since the data processing is carried where the data resides (on Hadoop cluster), data transformation and data movement is not required for data stored on Hadoop, while working with Impala.Using Impala, you can access the data that is stored in HDFS, HBase, and Amazon s3 without the knowledge of Java (MapReduce jobs). You can access them with a basic idea of SQL queries.To write queries in business tools, the data has to be gone through a complicated extract-transform-load (ETL) cycle. But, with Impala, this procedure is shortened. The time-consuming stages of loading & reorganizing is overcome with the new techniques such as exploratory data analysis & data discovery making the process faster.Impala is pioneering the use of the Parquet file format, a columnar storage layout that is optimized for large-scale queries typical in data warehouse scenarios.Features of ImpalaGiven below are the features of cloudera Impala −Impala is available freely as open source under the Apache license.Impala supports in-memory data processing, i.e., it accesses/analyzes data that is stored on Hadoop data nodes without data movement.You can access data using Impala using SQL-like queries.Impala provides faster access for the data in HDFS when compared to other SQL engines.Using Impala, you can store data in storage systems like HDFS, Apache HBase, and Amazon s3.You can integrate Impala with business intelligence tools like Tableau, Pentaho, Micro strategy, and Zoom data.Impala supports various file formats such as, LZO, Sequence File, Avro, RCFile, and Parquet.Impala uses metadata, ODBC driver, and SQL. Is Hive A Data Warehouse. What is Apache Hive? Two other common questions connected with Apache Hive are: 1) Is Hive a Data Warehouse? and 2) Is Hive A Is Hive A Data Warehouse. What is Apache Hive? Two other common questions connected with Apache Hive are: 1) Is Hive a Data Warehouse? and 2) Is Hive A database? . The answer to the second question is no. Hive is not a database but rather a data warehouse system built on top of Hadoop.

GitHub - AhnTus/Data-warehouse: Implement a Hive data warehouse

Hue is a web-based interactive query editor that enables you to interact with databases and data warehouses. Data architects, SQL developers, and data engineers use Hue to create data models, clean data to prepare it for analysis, and to build and test SQL scripts for applications. Hue is integrated with Apache Hive and Apache Impala. You can access Hue from the Cloudera Data Warehouse Virtual Warehouses. Cloudera Data Warehouse 1.1.2-b1520 offers the combined abilities of Data Analytics Studio (DAS) such as intelligent query recommendation, query optimization, and query debugging framework, and rich query editor experience of Hue, making Hue the next generation SQL assistant for Hive in Cloudera Data Warehouse. Hue offers powerful execution, debugging, and self-service capabilities to the following key Big Data personas: Business Analysts Data Engineers Data Scientists Power SQL users Database Administrators SQL Developers Business Analysts (BA) are tasked with exploring and cleaning the data to make it more consumable by other stakeholders, such as the data scientists. With Hue, they can import data from various sources and in multiple formats, explore the data using File Browser and Table Browser, query the data using the smart query editor, and create dashboards. They can save the queries, view old queries, schedule long-running queries, and share them with other stakeholders in the organization. They can also use Cloudera Data Visualization to get data insights, generate dashboards, and help make business decisions. Data Engineers design data sets in the form of tables for wider consumption and for exploring data, as well as scheduling regular workloads. They can use Hue to test various Data Engineering (DE) pipeline steps and help develop DE pipelines. Data scientists predominantly create models and algorithms to identify trends and patterns. They then analyze and interpret the data to discover solutions and predict opportunities. Hue provides quick access to structured data sets and a seamless interface to compose queries, search databases, tables, and columns, and execute query faster by leveraging Tez and LLAP. They can run ad hoc queries and start the analysis of data as pre-work for designing various machine learning models. Power SQL users are advanced SQL experts tasked with analyzing and fine-tuning queries to improve query throughput and performance. They often strive to meet the TPC decision support (TPC-DS) benchmark. Hue enables them to run complex queries and provides intelligent recommendations to optimize the query performance. They can further fine-tune the query parameters by comparing two queries, viewing the explain plan, analyzing the Directed Acyclic Graph (DAG) details, and using the query configuration details. They can also create and analyze materialized views. The Database Administrators (DBA) provide support to the data scientists and the power SQL users by helping them to debug long-running

HIVE - HIVE: A data warehouse infrastructure tool for processing

Syntax from Apache Hive.Relational Databases and ImpalaImpala uses a Query language that is similar to SQL and HiveQL. The following table describes some of the key dfferences between SQL and Impala Query language.ImpalaRelational databasesImpala uses an SQL like query language that is similar to HiveQL.Relational databases use SQL language.In Impala, you cannot update or delete individual records.In relational databases, it is possible to update or delete individual records.Impala does not support transactions.Relational databases support transactions.Impala does not support indexing.Relational databases support indexing.Impala stores and manages large amounts of data (petabytes).Relational databases handle smaller amounts of data (terabytes) when compared to Impala.Hive, Hbase, and ImpalaThough Cloudera Impala uses the same query language, metastore, and the user interface as Hive, it differs with Hive and HBase in certain aspects. The following table presents a comparative analysis among HBase, Hive, and Impala.HBaseHiveImpalaHBase is wide-column store database based on Apache Hadoop. It uses the concepts of BigTable.Hive is a data warehouse software. Using this, we can access and manage large distributed datasets, built on Hadoop.Impala is a tool to manage, analyze data that is stored on Hadoop.The data model of HBase is wide column store.Hive follows Relational model.Impala follows Relational model.HBase is developed using Java language.Hive is developed using Java language.Impala is developed using C++.The data model of HBase is schema-free.The data model of Hive is Schema-based.The data model of Impala is Schema-based.HBase provides Java, RESTful and, Thrift API’s.Hive provides JDBC, ODBC, Thrift API’s.Impala provides JDBC and ODBC API’s.Supports programming languages like C, C#, C++, Groovy, Java PHP, Python, and Scala.Supports programming languages like C++, Java, PHP, and Python.Impala supports all languages supporting JDBC/ODBC.HBase provides support for triggers.Hive does not provide any support for triggers.Impala does not provide any support for triggers.All these three databases −Are NOSQL databases.Available as open source.Support server-side scripting.Follow ACID properties like Durability and Concurrency.Use sharding for partitioning.Drawbacks of ImpalaSome of the drawbacks of using Impala are as follows −Impala does not provide any support for Serialization and Deserialization.Impala can only read text files, not custom binary files.Whenever new records/files are added to the data directory in HDFS, the table needs to be refreshed.

Apache Hive and Applications1. The Apache Hive data warehouse

ExampleCreating a managed table with partition and stored as a sequence file. The data format in the files is assumed to be field-delimited by Ctrl-A (^A) and row-delimited by newline. The below table is created in hive warehouse directory specified in value for the key hive.metastore.warehouse.dir in the Hive config file hive-site.xml.CREATE TABLE view(time INT, id BIGINT,url STRING, referrer_url STRING,add STRING COMMENT 'IP of the User')COMMENT 'This is view table'PARTITIONED BY(date STRING, region STRING)ROW FORMAT DELIMITEDFIELDS TERMINATED BY '\001'STORED AS SEQUENCEFILE;Creating a external table with partitions and stored as a sequence file. The data format in the files is assumed to be field-delimited by ctrl-A and row-delimited by newline. The below table is created in the location specified and it comes handy when we already have data. One of the advantages of using an external table is that we can drop the table without deleting the data. For instance, if we create a table and realize that the schema is wrong, we can safely drop the table and recreate with the new schema without worrying about the data.Other advantage is that if we are using other tools like pig on same files, we can continue using them even after we delete the table.CREATE EXTERNAL TABLE view(time INT, id BIGINT,url STRING, referrer_url STRING,add STRING COMMENT 'IP of the User')COMMENT 'This is view table'PARTITIONED BY(date STRING, region STRING)ROW FORMAT DELIMITEDFIELDS TERMINATED BY '\001'STORED AS SEQUENCEFILELOCATION '';Creating a table using select query and populating results from query,these statements are known as CTAS(Create Table As Select).There are two parts in CTAS, the SELECT part can be any SELECT statement supported by HiveQL. The CREATE part of the CTAS takes the resulting schema from the SELECT part and creates the target table with other table properties such as the SerDe and storage format.CTAS has these restrictions:The target table cannot be a partitioned table.The target table cannot be an external table.The target table cannot be a list bucketing table.CREATE TABLE new_key_value_storeROW FORMAT SERDE "org.apache.hadoop.hive.serde2.columnar.ColumnarSerDe"STORED AS RCFileASSELECT * FROM page_viewSORT BY url, add;Create Table Like:The LIKE form of CREATE TABLE allows you to copy an existing table definition exactly (without copying its data). In contrast to CTAS, the statement below creates a new table whose definition exactly matches the existing table in all particulars other than table name. The new table contains no rows.CREATE TABLE empty_page_viewsLIKE page_views;. Is Hive A Data Warehouse. What is Apache Hive? Two other common questions connected with Apache Hive are: 1) Is Hive a Data Warehouse? and 2) Is Hive A Is Hive A Data Warehouse. What is Apache Hive? Two other common questions connected with Apache Hive are: 1) Is Hive a Data Warehouse? and 2) Is Hive A database? . The answer to the second question is no. Hive is not a database but rather a data warehouse system built on top of Hadoop.