Amazon ElastiCache vs Amazon RDS for PostgreSQL

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Amazon ElastiCache vs Amazon RDS for PostgreSQL: What are the differences?

Developers describe Amazon ElastiCache as "Deploy, operate, and scale an in-memory cache in the cloud". ElastiCache improves the performance of web applications by allowing you to retrieve information from fast, managed, in-memory caches, instead of relying entirely on slower disk-based databases. ElastiCache supports Memcached and Redis. On the other hand, Amazon RDS for PostgreSQL is detailed as "* Set up, operate, and scale PostgreSQL deployments in the cloud*". Amazon RDS manages complex and time-consuming administrative tasks such as PostgreSQL software installation and upgrades, storage management, replication for high availability and back-ups for disaster recovery. With just a few clicks in the AWS Management Console, you can deploy a PostgreSQL database with automatically configured database parameters for optimal performance. Amazon RDS for PostgreSQL database instances can be provisioned with either standard storage or Provisioned IOPS storage. Once provisioned, you can scale from 10GB to 3TB of storage and from 1,000 IOPS to 30,000 IOPS.

Amazon ElastiCache can be classified as a tool in the "Managed Memcache" category, while Amazon RDS for PostgreSQL is grouped under "PostgreSQL as a Service".

Some of the features offered by Amazon ElastiCache are:

  • Support for two engines: Memcached and Redis
  • Ease of management via the AWS Management Console. With a few clicks you can configure and launch instances for the engine you wish to use.
  • Compatibility with the specific engine protocol. This means most of the client libraries will work with the respective engines they were built for - no additional changes or tweaking required.

On the other hand, Amazon RDS for PostgreSQL provides the following key features:

  • Monitoring and Metrics –Amazon RDS provides Amazon CloudWatch metrics for you DB Instance deployments at no additional charge.
  • DB Event Notifications –Amazon RDS provides Amazon SNS notifications via email or SMS for your DB Instance deployments.
  • Automatic Software Patching – Amazon RDS will make sure that the PostgreSQL software powering your deployment stays up-to-date with the latest patches.

"Redis" is the primary reason why developers consider Amazon ElastiCache over the competitors, whereas "Easy setup, backup, monitoring" was stated as the key factor in picking Amazon RDS for PostgreSQL.

Instacart, SendGrid, and Sellsuki are some of the popular companies that use Amazon ElastiCache, whereas Amazon RDS for PostgreSQL is used by Instacart, Tictail, and DSTLD. Amazon ElastiCache has a broader approval, being mentioned in 342 company stacks & 79 developers stacks; compared to Amazon RDS for PostgreSQL, which is listed in 164 company stacks and 27 developer stacks.

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What is Amazon ElastiCache?

ElastiCache improves the performance of web applications by allowing you to retrieve information from fast, managed, in-memory caches, instead of relying entirely on slower disk-based databases. ElastiCache supports Memcached and Redis.

What is Amazon RDS for PostgreSQL?

Amazon RDS manages complex and time-consuming administrative tasks such as PostgreSQL software installation and upgrades, storage management, replication for high availability and back-ups for disaster recovery. With just a few clicks in the AWS Management Console, you can deploy a PostgreSQL database with automatically configured database parameters for optimal performance. Amazon RDS for PostgreSQL database instances can be provisioned with either standard storage or Provisioned IOPS storage. Once provisioned, you can scale from 10GB to 3TB of storage and from 1,000 IOPS to 30,000 IOPS.
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      What are some alternatives to Amazon ElastiCache and Amazon RDS for PostgreSQL?
      Redis
      Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
      Elasticsearch
      Elasticsearch is a distributed, RESTful search and analytics engine capable of storing data and searching it in near real time. Elasticsearch, Kibana, Beats and Logstash are the Elastic Stack (sometimes called the ELK Stack).
      Memcached
      Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering.
      Azure Redis Cache
      It perfectly complements Azure database services such as Cosmos DB. It provides a cost-effective solution to scale read and write throughput of your data tier. Store and share database query results, session states, static contents, and more using a common cache-aside pattern.
      MemCachier
      MemCachier provides an easy and powerful managed caching solution for all your performance and scalability needs. It works with the ubiquitous memcache protocol so your favourite language and framework already supports it.
      See all alternatives
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      How developers use Amazon ElastiCache and Amazon RDS for PostgreSQL
      Avatar of Volkan Özçelik
      Volkan Özçelik uses Amazon ElastiCacheAmazon ElastiCache

      I use a micro elesticache instance as a shared session store between the Node.js clusters of dojo.zerotoherojs.com and nightly.zerotoherojs.com

      Avatar of Cloud Consultant
      Cloud Consultant uses Amazon ElastiCacheAmazon ElastiCache

      Audit the ElastiCache configurations for best practices and standards.

      Avatar of Binded
      Binded uses Amazon ElastiCacheAmazon ElastiCache

      We use ElastiCache to run Redis, which we use as a queue through Kue.

      Avatar of Mark Walle
      Mark Walle uses Amazon RDS for PostgreSQLAmazon RDS for PostgreSQL

      Using PostGIS to serve GeoJSON data for the Leaflet front-end.

      Avatar of Instacart
      Instacart uses Amazon ElastiCacheAmazon ElastiCache

      We use Elasticache. Both Redis and Memchached.

      Avatar of Bùi Thanh
      Bùi Thanh uses Amazon ElastiCacheAmazon ElastiCache
      • Redis cluster for cache and session storage
      Avatar of Tinkhaven
      Tinkhaven uses Amazon RDS for PostgreSQLAmazon RDS for PostgreSQL

      Main relational DB engine

      Avatar of Solcast
      Solcast uses Amazon RDS for PostgreSQLAmazon RDS for PostgreSQL

      Store and query data

      How much does Amazon ElastiCache cost?
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