MSET and MGET for bulk operations in Redis

Introduction

MSET and MGET let you save or get many values at once in Redis. This saves time and makes your work faster.

You want to save multiple settings for a user in one go.

You need to get prices of many products quickly.

You want to update several counters at the same time.

You want to fetch multiple session data for users in one request.

Syntax

Redis

MSET key1 value1 key2 value2 ... keyN valueN
MGET key1 key2 ... keyN

MSET sets many keys and values in one command.

MGET gets the values of many keys in one command.

Examples

This saves three keys with their values at once.

Redis

MSET name "Alice" age "30" city "Paris"

This gets the values of the three keys in the same order.

Redis

MGET name age city

Save names of three products quickly.

Redis

MSET product1 "Book" product2 "Pen" product3 "Notebook"

Retrieve the names of the three products in one call.

Redis

MGET product1 product2 product3

Sample Program

First, we save three users' names with MSET. Then, we get all three names with MGET.

Redis

MSET user1 "John" user2 "Jane" user3 "Doe"
MGET user1 user2 user3

Important Notes

If a key does not exist in MGET, Redis returns nil for that key.

MSET is atomic, so all keys are set at once or none at all.

Summary

MSET saves many keys and values in one command.

MGET fetches many values by keys in one command.

Using these commands makes Redis faster and simpler for bulk data.