What is the difference between Redis and Memcached

The main difference between Redis and Memcached is that Redis is an open source key-value store that helps build scalable web applications, while Memcached is a high-performance, open source distributed memory caching system that speeds up web applications by reduce database loads.

Big data refers to a collection of large data sets. It has three properties like volume, variety and speed. Volume refers to the amount of data, while variety refers to various types of data, and speed refers to the speed of data generation. However, relational database management systems are not well suited to storing this type of large data set. These provide solutions to store them.

Key Areas Covered

1. What is redis
     – Definition, Functionality
2. What is memcached
     – Definition, Functionality
3. What is the difference between them
     – Comparison of key differences

what is redis

Redis is an open source key-value store that helps build high-performance, scalable web applications. What Remote Dictionary Server represents . It supports data structures such as strings, hashes, lists, sets, ordered sets, bitmaps, hyperloglogs, and spatial indexes. Also, it stores data in key value pairs. The main programming language used to write Redis is the C language.

These are the many advantages of using Redis. Stores data in memory. Therefore, it works faster. There are also options to write data to disk. Also, it is possible to use Redis with another database. There is a lot of data in enterprise-grade applications. It is possible to keep frequently required data in Redis and store the rest of the data in some other database.

what is memcached

Memcached is a general purpose memory caching system. Additionally, it is capable of caching data and objects in RAM to minimize the number of times an external data source must be read. Thus, it helps speed up dynamic database-driven websites. The Memcached API provides a massive hash table distributed across multiple devices.

Memcached is suitable for handling high database loads. Many systems like YouTube, Reddit, Facebook, Twitter, Wikipedia and Pinterest use Memcached. Additionally, applications such as Microsoft Azure, Amazon Web Services, and Google App Engine provide a Memcached service through an API.

Difference 

Definition

Redis is an open source, in-memory data structure store used as a database, cache, and message broker. In contrast, Memcached is a free, high-performance, distributed memory object caching system that speeds up dynamic web applications by lowering database load. These definitions explain the main difference between Redis and Memcached.

developer

Salvatore Sanfilippo developed Redis while Danga Interactive developed Memcached.

Installation

There is also a difference between them in installation. It is easier to install Redis compared to Memcached.

memory efficiency

Memory efficiency is another difference between them. Memcached is more memory efficient than Redis as it requires minimal memory resources for metadata.

Data structures

Additionally, Redis supports strings, hashes, lists, sets, ordered sets, bitmaps, hyperloglogs, and spatial indexes, while Memcached supports strings and integers.

Persistence

Redis can handle persistent data, while Memcached does not use persistent data. So this is also a difference between them.

execution speed

Another difference between them is the execution speed; Memcached read and write speed is higher than Redis.

Replication

Also, Redis supports master-slave replication while Memcached does not.

Durability

Another difference between them is that Redis is more durable than Memcached.

key length

Redis key length is 2 GB maximum while Memcached key length is 250 bytes.

conclusion

Redis is an open source key-value store that helps build scalable web applications, while Memcached is a high-performance, open source distributed memory caching system that speeds up web applications by reducing database loads. Therefore, this is the main difference between them.

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