1 What is Hive?

Hive is a data warehouse software which is used for facilitates querying and managing large data sets residing in distributed storage.

Hive language almost look like SQL language called HiveQL. Hive also allows traditional map reduce programs to customize mappers and reducers when it is inconvenient or inefficient to execute the logic in HiveQL (User Defined Functions UDFS)

2 What is Hive Metastore?

Hive metastore is a database that stores metadata about your Hive tables (eg. Table name, column names and types,table location, storage handler being used, number of buckets in the table, sorting columns if any, partition columns if any, etc.).

When you create a table,this metastore gets updated with the information related to the new table which gets queried when you issue queries on that table.

Hive is a central repository of hive metadata. it has 2 parts services and data. by default it uses derby db in local disk. it is referred as embedded metastore configuration. It tends to the limitation that only one session can be served at any given point of time.

3 Which classes are used by the Hive to Read and Write HDFS Files?

Following classes are used by Hive to read and write HDFS files

•TextInputFormat/HiveIgnoreKeyTextOutputFormat: These 2 classes read/write data in plain text file format.
•SequenceFileInputFormat/SequenceFileOutputFormat: These 2 classes read/write data in hadoop SequenceFile format.

Please Download for Detailed Tutorial Content

Drop Us A Query

Trending Courses
  • Python and Django Online Training
  • Python is a dynamic interrupted language which is used in wide varieties of applications. It is very interactive object oriented and high-level programming language.

  • Tableau Online Training
  • Tableau is a Software company that caters interactive data visualization products that provide Business Intelligence services. The company’s Head Quarters is in Seattle, USA.

  • MicroStrategy Online Training
  • Micro Strategy is one of the few independent and publicly trading Business Intelligence software provider in the market. The firm is operational in 27 Countries around the globe.

  • PEGA (PRPC) 7.2 Certification Online Training
  • Pega Systems Inc. is a Cambridge, Massachusetts based Software Company. It is known for developing software for Customer Relationship Management (CRM) and Business process Management (BPM).

  • Workday Online Training
  • Workday specialises in providing Human Capital Management, Financial Management and payroll in online domain.It is a major web based ERP software vendor.

  • Power BI Online Training
  • Power BI is business analytics service by Microsoft. With Power BI, end users can develop reports and dashboards without depending on IT staff or Database Administrator.


 

100% Secure Payments. All major credit & debit cards accepted.