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Redis vs. Memcached: 2021 Comparison

Redis stands for REmote DIctionary Server, created in 2009 by Salvatore Sanfilippo. Memcached, on the other hand, was created in 2003 by Brad Fitzpatrick. Both Redis and Memcached are:

  • NoSQL in-memory data structures
  • Written in C
  • Open source
  • Used to speed up applications
  • Support sub-millisecond latency

In 2014, Salvatore wrote an excellent StackOverflow post on when it makes more sense to use Memcached than Redis. In this post, we provide a current and detailed comparison between Redis and Memcached so that you can make an informed choice about their use in your application.

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Selecting an AWS EC2 Instance for KeyDB

When searching for information on what instance type to use, the answer is typically, "it depends." This article boils down instance types with both general data on EC2 types as well as in-depth analysis of KeyDB performance and selection for different types.

The focus of this article will be using KeyDB as an in-memory database. There will be future articles on using KeyDB with FLASH storage, as well as with some of KeyDB-Pro's features, such as FLASH persistence and advanced querying, where many more cores can be taken advantage of under query intensive workloads (O(n) heavy operations, such as KEYS). When AWS Graviton2's are available, we will publish those results too.