Browse Definitions:
Definition

Redis

Redis is an open source key-value database. Data in a key-value database has two parts: the key and the value. Because Redis can accept keys in a wide range of formats, operations can be executed on the server and reduce the client's workload. Redis is often used for cache management and speeding up web applications.

Redis is written in ANSI C and runs on POSIX systems such as Linux, Mac OS X and Solaris. It can be accessed by applications through its client API library.  Redis, which has a relatively rich set of data types when compared to many key-value data stores, holds its database entirely in memory, using the disk only for persistence.

Redis supports these data structures:

Binary-safe strings - lists or collections of string elements are sorted according to the order of insertion.

Sets and sorted sets - collections of unique, unsorted string elements and collections in which every string element is associated with a floating number value called a score.

Hashes - maps composed of fields associated with values. Both the field and the value are strings.

Bit arrays (bitmaps) - use special commands to handle string values like an array of bits.

HyperLogLogs - a data structure that can estimate the number of items in a set.

Geospatial indexes - data that is stored as coordinate pairs.

Redis 3.0 introduces Redis Cluster, a distributed implementation of Redis that included automatic data sharding and fault tolerance. Although there is no official support for Windows builds, Microsoft maintains a Win-64 port of Redis at GitHub.

See also: in-memory database, NoSQL

This was last updated in May 2016

Continue Reading About Redis

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

SearchSecurity

SearchHealthIT

SearchDisasterRecovery

  • incident management plan (IMP)

    An incident management plan (IMP), sometimes called an incident response plan or emergency management plan, is a document that ...

  • crisis communication

    Crisis communication is a method of corresponding with people and organizations during a disruptive event to provide them with ...

  • Zerto

    Zerto is a storage software vendor that specializes in enterprise-class business continuity and disaster recovery in virtual and ...

SearchStorage

  • network-attached storage (NAS)

    Network-attached storage (NAS) is dedicated file storage that enables multiple users and heterogeneous client devices to retrieve...

  • SSD write cycle

    An SSD write cycle is the process of programming data to a NAND flash memory chip in a solid-state storage device.

  • data storage

    Data storage is the collective methods and technologies that capture and retain digital information on electromagnetic, optical ...

Close