Amazon RDS

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By Jayant Sharma


Amazon Relational Database Service (Amazon RDS) is a web service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient, resizable capacity for an industry-standard relational database and manages common database administration tasks. Administration processes like patching the database software, backing up databases and enabling recovery are managed automatically.
Amazon RDS was first released on 22 October 2009 and MySQL is only supported. Then support for Oracle Database in June 2011, Microsoft SQL Server in May 2012, PostgreSQL in November 2013, and MariaDB (a fork of MySQL) in October 2015, and an additional 80 features during 2017. In November 2014, AWS announced Amazon Aurora, a MySQL-compatible database offering enhanced high availability and performance, and in October 2017 a PostgreSQL-compatible database offering was launched. So now AWS RDS has a broad variety of database supported as shown in figure.


DB Instances

The basic building block of Amazon RDS is the DB instance. 
A DB instance is an isolated database environment in the cloud. A DB instance can contain multiple user-created databases, and you can access it by using the same tools and applications that you use with a stand-alone database instance. You can create and modify a DB instance by using the AWS Command Line Interface (AWS CLI), the Amazon RDS API, or the AWS Management Console.
Each DB instance runs a DB engine. Amazon RDS supports the MySQL, MariaDB, PostgreSQL, Oracle, and Microsoft SQL Server DB engines. Each DB engine has its own supported features, and each version of a DB engine may include specific features. Additionally, each DB engine has a set of parameters in a DB parameter group that control the behavior of the databases that it manages.
The computation and memory capacity of a DB instance is determined by its DB instance class. You can select the DB instance that best meets your needs. If your needs change over time, you can change DB instances.

DB instance storage

DB instances for Amazon RDS use Amazon Elastic Block Store (Amazon EBS) volumes for database and log storage. Depending on the amount of storage requested, Amazon RDS automatically stripes across multiple Amazon EBS volumes to enhance performance.
Amazon RDS provides three storage types: 
  • General Purpose SSD,
  • Provisioned IOPS SSD and 
  • magnetic. They differ in performance characteristics and price, which means that you can tailor your storage performance and cost to the needs of your database workload.
General Purpose SSD storage offers cost-effective storage that is acceptable for most database workloads. 
Provisioned IOPS SSD Storage is used for production application that requires fast and consistent I/O performance, it is recommend to use Provisioned IOPS (input/output operations per second) storage. Provisioned IOPS storage is a storage type that delivers predictable performance, and consistently low latency. Provisioned IOPS storage is optimized for online transaction processing (OLTP) workloads.
Magnetic Storage is supported for backward compatibility. We recommend that you use General Purpose SSD or Provisioned IOPS SSD for any new storage needs. The following are some limitations for magnetic storage:
  • Doesn't allow you to scale storage when using the SQL Server database engine.
  • Doesn't support elastic volumes.

DB Instance Class

The DB instance class determines the computation and memory capacity of an Amazon RDS DB instance. The DB instance class you need, depends on your processing power and memory requirements.
Amazon RDS supports three types of instance classes: 
  • Standard, 
  • Memory Optimized, and 
  • Burstable Performance. 














Comments

  1. DevOpsFebruary 14, 2020 at 3:48 PM

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  2. DevOpsFebruary 14, 2020 at 3:51 PM

    Thanks for sharing the valuable information. It was a great information.
    Amazon Web Services Online Training

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