Using Redis commands on Docs

Keys and values

Mon, 01 Jan 0001 00:00:00 +0000

Every data object that you store in a Redis database has its own unique key. The key is a string that you pass to Redis commands to retrieve the corresponding object or modify its data. The data object associated with a particular key is known as the value and the two together are known as as key-value pair.

Content of keys

A key is typically a textual name that has some meaning within your data model. Unlike variable names in a programming language, Redis keys have few restrictions on their format, so keys with whitespace or punctuation characters are mostly fine (for example, "1st Attempt", or "% of price in $"). Redis doesn't support namespaces or other categories for keys, so you must take care to avoid name collisions. However, there is a convention for using the colon ":" character to split keys into sections (for example, "person:1", "person:2", "office:London", "office:NewYork:1"). You can use this as a simple way to collect keys together into categories.

Redis pipelining

Mon, 01 Jan 0001 00:00:00 +0000

Redis pipelining is a technique for improving performance by issuing multiple commands at once without waiting for the response to each individual command. Pipelining is supported by most Redis clients. This document describes the problem that pipelining is designed to solve and how pipelining works in Redis.

Request/Response protocols and round-trip time (RTT)

Redis is a TCP server using the client-server model and what is called a Request/Response protocol.

Transactions

Mon, 01 Jan 0001 00:00:00 +0000

Redis Transactions allow the execution of a group of commands in a single step, they are centered around the commands MULTI, EXEC, DISCARD and WATCH. Redis Transactions make two important guarantees:

All the commands in a transaction are serialized and executed sequentially. A request sent by another client will never be served in the middle of the execution of a Redis Transaction. This guarantees that the commands are executed as a single isolated operation.

Multi-key operations

Mon, 01 Jan 0001 00:00:00 +0000

Multi-key operations in Redis allow you to work with multiple keys in a single command, but their behavior varies significantly depending on your Redis configuration and clustering setup. This page provides a quick reference for developers working with multi-key operations across different Redis configurations.

Configurations

Redis supports five distinct configurations, each with different multi-key command behaviors: