Browse Definitions :
Definition

Apache Parquet

Contributor(s): Matthew Haughn

Apache Parquet is a column-oriented storage format for Hadoop. Hadoop is a free, Java-based programming framework that supports the processing of large data sets in a distributed computing environment. Parquet is optimized to work with complex data in bulk and includes methods for efficient data compression and encoding types.

Typically, data is stored in a row-oriented fashion. Even in databases, data is conventionally stored in this way and is optimized for working with one record at a time. Parquet uses a record-shredding and assembly algorithm to break down data and reassemble it so values in each column are physically stored in contiguous memory locations. Data stored by column in this serialized method allows for efficient searches across massive data sets. Since Hadoop is made for big data, columnar storage is a complementary technology.  

Storing data in a columnar format provides benefits such as:

  • More efficient compression due to space saved by the columnar format.
  • Likeness of the data of columns enables data compression for the specific type of data.
  • Queries searching specific column values need not read the entire row's data, making searches faster.
  • Different encoding can be used per column, allowing for better compression to be used as it is developed.

Parquet’s Apache Thrift framework increases flexibility, to allow working with C++, Java and Python.
Parquet is compatible with the majority of data processing frameworks in Hadoop. Other columnar storage file formats include ORC, RCFile and optimized RCFile.

Parquet is a top-level project sponsored by the Apache Software Foundation (ASF). The project originated as a joint effort of Twitter and Cloudera.

This was last updated in December 2017

Continue Reading About Apache Parquet

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • Port Scan

    A port scan is a series of messages sent by someone attempting to break into a computer to learn which computer network services ...

  • DMZ (networking)

    In computer networks, a DMZ (demilitarized zone), also sometimes known as a perimeter network or a screened subnetwork, is a ...

  • quantum supremacy

    Quantum supremacy is the experimental demonstration of a quantum computer's dominance and advantage over classic computers by ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

Close