{"id":312,"date":"2019-02-06T09:46:41","date_gmt":"2019-02-06T09:46:41","guid":{"rendered":"https:\/\/www.testpreptraining.com\/tutorial\/?page_id=312"},"modified":"2020-05-01T12:29:20","modified_gmt":"2020-05-01T12:29:20","slug":"amazon-relational-database-service-amazon-rds","status":"publish","type":"page","link":"https:\/\/www.testpreptraining.ai\/tutorial\/aws-certified-solutions-architect-associate-table-of-content\/amazon-relational-database-service-amazon-rds\/","title":{"rendered":"Amazon Relational Database Service (Amazon RDS)"},"content":{"rendered":"\n<ul class=\"wp-block-list\"><li>service to simplify the setup, operations, and scaling of a relational database on AWS.<\/li><li>Thus, spend more time focusing on application and schema<\/li><li>RDS offload common tasks as\n<ul>\n<li>backups<\/li>\n<\/ul>\n<ul>\n<li>patching<\/li>\n<\/ul>\n<ul>\n<li>scaling<\/li>\n<\/ul>\n<ul>\n<li>replication<\/li>\n<\/ul>\n<\/li><li>streamline installation of database software and provisioning of infrastructure capacity.<\/li><li>can launch many popular SQL database engines<\/li><li>simplifies maintenance by automating common administrative tasks on a recurring basis<\/li><li>easily replicate data to increase availability, improve durability<\/li><li>exposes database endpoint to which client software can connect and execute SQL.<\/li><li>does not provide shell access to Database (DB) Instances,<\/li><li>restricts access to certain system procedures and tables requiring advanced privileges.<\/li><li>use same tools to query, analyze, modify, and administer the database.<\/li><\/ul>\n\n\n\n<p><strong>Database (DB) Instances<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>is an isolated database environment deployed in private network segments in the cloud.<\/li><li>RDS provides API to create and manage one or more DB Instances.<\/li><li>each DB Instance runs and manages a popular commercial or open source database engine<\/li><li>RDS supports the database engines as\n<ul>\n<li>MySQL<\/li>\n<\/ul>\n<ul>\n<li>PostgreSQL<\/li>\n<\/ul>\n<ul>\n<li>MariaDB<\/li>\n<\/ul>\n<ul>\n<li>Oracle<\/li>\n<\/ul>\n<ul>\n<li>SQL Server<\/li>\n<\/ul>\n<ul>\n<li>Amazon Aurora<\/li>\n<\/ul>\n<\/li><li>launch a new DB Instance by\n<ul>\n<li>calling the CreateDBInstance API<\/li>\n<\/ul>\n<ul>\n<li>by using the AWS Management Console.<\/li>\n<\/ul>\n<\/li><li>existing DB Instances can be altered or resized using the ModifyDBInstance API.<\/li><li>Database Instance can contain multiple different databases<\/li><li>create and manage within DB Instance by executing SQL commands with RDS endpoint<\/li><li>existing databases can be migrated to RDS<\/li><\/ul>\n\n\n\n<p><strong>RDS Benefits<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>RDS increases database operational reliability by applying consistent deployment and operational model.<\/li><li>High consistency level is achieved by limiting types of changes that can be made to RDS.<\/li><li>It simplify common tasks in operating a relational database.<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/08\/image-255-606x400.png\" alt=\"\" class=\"wp-image-2771\"\/><\/figure>\n\n\n\n<p><strong>RDS Database Engines<\/strong><\/p>\n\n\n\n<p>MySQL:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>most popular open source databases.<\/li><li>RDS for MySQL supports MySQL 5.7, 5.6, 5.5 and 5.1.<\/li><li>engine runs open source Community Edition with InnoDB as the default and recommended database storage engine.<\/li><li>Amazon RDS for MySQL can connect using MySQL Workbench or SQL Workbench\/J.<\/li><li>Amazon RDS for MySQL supports Multi-AZ deployments for high availability and read replicas for horizontal scaling.<\/li><\/ul>\n\n\n\n<p>PostgreSQL<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>most widely used open source database engine<\/li><li>Has rich set of features and advanced functionality.<\/li><li>RDS supports DB Instances supports several versions and multiple releases of PostgreSQL &#8211; 9.5.x, 9.4.x, and 9.3.x.<\/li><li>RDS PostgreSQL uses tools like pgAdmin and JDBC\/ODBC drivers.<\/li><li>RDS PostgreSQL also supports Multi-AZ deployment for high availability and read replicas for horizontal scaling.<\/li><\/ul>\n\n\n\n<p>MariaDB<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>It is another popular open source database engine<\/li><li>built by the creators of MySQL<\/li><li>It has enterprise tools and functionality.<\/li><li>AWS supports MariaDB version 10.0.17<\/li><li>RDS fully supports the XtraDB storage engine for MariaDB DB Instances<\/li><li>RDS also support for Multi-AZ deployment and read replicas.<\/li><\/ul>\n\n\n\n<p>Oracle<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>popular commercial relational databases<\/li><li>used in enterprise<\/li><li>RDS supports Oracle 11g and Oracle 12c.<\/li><li>RDS supports access to schemas on a DB Instance using Oracle SQL Plus.<\/li><\/ul>\n\n\n\n<p>Microsoft SQL Server<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>popular commercial relational database<\/li><li>used in enterprise<\/li><li>DBAs in RDS can connect to their SQL Server DB Instance in the cloud<\/li><li>Supports native tools like SQL Server Management Studio.<\/li><li>RDS support SQL Server 2008 R2, SQL Server 2012, and SQL Server 2014.<\/li><\/ul>\n\n\n\n<p>Licensing<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>RDS Oracle and Microsoft SQL Server are commercial software products<\/li><li>Need appropriate licenses to operate in cloud.<\/li><li>AWS provides two licensing models\n<ul>\n<li>License Included &#8211; license held by AWS and included in the Amazon RDS instance price. &nbsp;For Oracle, only Standard Edition One provided<\/li>\n<\/ul>\n<\/li><li>Bring Your Own License (BYOL) &#8211; User has to provide license. For Oracle appropriate Oracle Database license for DB Instance class and Oracle Database edition is needed.<\/li><\/ul>\n\n\n\n<p><strong>Amazon Aurora <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>It offers enterprise-grade commercial database technology<\/li><li>offers simplicity and cost effectiveness of an open source database.<\/li><li>It is fully managed service,<\/li><li>It is MySQLcompatible out of the box<\/li><li>It can deliver up to five times the performance of MySQL without requiring changes<\/li><li>Aurora DB cluster consists of two different types of instances as\n<ul>\n<li>Primary Instance \u2013 main instance, supporting read and write workloads. Each Amazon Aurora DB cluster has one primary instance.<\/li>\n<\/ul>\n<ul>\n<li>Aurora \u2013 Replica\n<ul>\n<li>secondary instance supporting only read operations. Each DB cluster can have up to 15 Amazon Aurora Replicas.<\/li>\n<\/ul>\n<ul>\n<li>multiple Aurora Replicas, can distribute the read workload among various instances, increasing performance.<\/li>\n<\/ul>\n<ul>\n<li>Can also locate Aurora Replicas in multiple Availability Zones to increase database availability.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li><\/ul>\n\n\n\n<p><strong>RDS Storage Options<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>RDS is developed using Amazon EBS<\/li><li>Hence, can select storage option based on performance and cost requirements.<\/li><li>Based on database engine and workload, can scale up to 4 to 6TB in provisioned storage and up to 30,000 IOPS.<\/li><li>RDS supports three storage types namely \u2013 Magnetic, General Purpose (Solid State Drive [SSD]), and Provisioned IOPS (SSD).<\/li><li>Magnetic Storage:\n<ul>\n<li>Also called standard storage.<\/li>\n<\/ul>\n<ul>\n<li>offers cost-effective storage for applications with light I\/O requirements.<\/li>\n<\/ul>\n<\/li><li>General Purpose (SSD):\n<ul>\n<li>also called as gp2.<\/li>\n<\/ul>\n<ul>\n<li>provide faster access than magnetic storage.<\/li>\n<\/ul>\n<ul>\n<li>can provide burst performance to meet spikes<\/li>\n<\/ul>\n<ul>\n<li>ideal for small- to medium-sized databases.<\/li>\n<\/ul>\n<\/li><li>Provisioned IOPS (SSD):\n<ul>\n<li>designed for I\/O-intensive workloads, sensitive to storage performance and consistency in random access I\/O throughput.<\/li>\n<\/ul>\n<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"143\" src=\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/08\/image-256.png\" alt=\"\" class=\"wp-image-2772\"\/><\/figure>\n\n\n\n<p><strong>RDS Backup<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>RDS offers a consistent operational model for backup and recovery for all database engines<\/li><li>RDS offers two mechanisms for database backup &#8211; Automated backups and Manual snapshots.<\/li><li>Critical metric for backup, are\n<ul>\n<li>RPO &#8211; maximum period of data loss, acceptable in failure or incident.<\/li>\n<\/ul>\n<ul>\n<li>RTO &#8211; maximum amount of downtime, permitted to recover from backup and resume processing.<\/li>\n<\/ul>\n<\/li><li>Automated Backups\n<ul>\n<li>continuously tracks changes and backs up database.<\/li>\n<\/ul>\n<ul>\n<li>RDS creates a storage volume snapshot of DB Instance, backing up entire DB Instance and not individual databases.<\/li>\n<\/ul>\n<ul>\n<li>It can occur daily during a configurable 30-minute maintenance window called the backup window.<\/li>\n<\/ul>\n<ul>\n<li>backups are kept for a configurable number of days, called backup retention period.<\/li>\n<\/ul>\n<ul>\n<li>Can restore DB Instance to any specific time during this retention period, creating a new DB Instance.<\/li>\n<\/ul>\n<\/li><li>Manual DB Snapshots\n<ul>\n<li>Can perform manual DB snapshots at any time.<\/li>\n<\/ul>\n<ul>\n<li>Database snapshot can be initiated and created as frequently as required.<\/li>\n<\/ul>\n<ul>\n<li>Then restore DB Instance to specific state in DB snapshot at any time.<\/li>\n<\/ul>\n<ul>\n<li>Database snapshots can also be created with RDS console or the CreateDBSnapshot action.<\/li>\n<\/ul>\n<\/li><\/ul>\n\n\n\n<p><strong>RDS Recovery <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>RDS permits to recover database quickly with automated or manual DB snapshots.<\/li><li>cannot restore\n<ul>\n<li>from a DB snapshot to an existing DB Instance<\/li>\n<\/ul>\n<ul>\n<li>when a new DB Instance is created when restored.<\/li>\n<\/ul>\n<\/li><li>During DB Instance restore , only default DB parameter and security groups are associated with restored instance.<\/li><li>After restore, associate any custom DB parameter or security groups used by instance from which restored.<\/li><li>In automated backups, RDS combines daily backups performed during predefined maintenance window with transaction logs<\/li><\/ul>\n\n\n\n<p><strong>High Availability with Multi-AZ<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>It allows to create a database cluster across multiple Availability Zones.<\/li><li>Used for RDBMS to run in highly available and fault-tolerant manner<\/li><li>It reduce DB administrative task complexity<\/li><li>It increase availability of database using replication.<\/li><li>Can meet demanding RPO and RTO targets by using synchronous replication.<\/li><li>Can place secondary copy of database in another AZ for disaster recovery.<\/li><li>Its deployments are available for all RDS database engines.<\/li><li>We can have primary instance in a AZ and secondary instance in another AZ<\/li><li>Automatically replicate data from primary instance to secondary instance by synchronous replication.<\/li><li>Every AZ runs on its own physically distinct, independent infrastructure<\/li><li>Failover in event of\n<ul>\n<li>Loss of availability in primary Availability Zone<\/li>\n<\/ul>\n<ul>\n<li>Loss of network connectivity to primary database<\/li>\n<\/ul>\n<ul>\n<li>Compute unit failure on primary database<\/li>\n<\/ul>\n<ul>\n<li>Storage failure on primary database<\/li>\n<\/ul>\n<\/li><\/ul>\n\n\n\n<p><strong>Scaling Up and Out<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>scaling up (or vertically scaling) is by getting a larger machine permits to process more reads and writes.<\/li><li>Scaling out (or horizontally scaling) is adding more machines<\/li><li>RDS can scale compute and storage vertically and DB engines scale horizontally.<\/li><li>Vertical Scalability or Scaling Up\n<ul>\n<li>adding additional compute, memory, or storage resources to database<\/li>\n<\/ul>\n<ul>\n<li>to process more transactions, run more queries, and store more data.<\/li>\n<\/ul>\n<ul>\n<li>RDS makes it simple and can be scheduled to occur during next maintenance window<\/li>\n<\/ul>\n<ul>\n<li>to scale immediately use ModifyDBInstance action.<\/li>\n<\/ul>\n<ul>\n<li>to change amount of compute and memory, select a different DB Instance class of database.<\/li>\n<\/ul>\n<\/li><li>Horizontal Scalability with Sharding or Scaling Out\n<ul>\n<li>RDBMS can scale vertically before reaching maximum instance size.<\/li>\n<\/ul>\n<ul>\n<li>Partitioning a large RDBMS into multiple instances or shards can handle more requests beyond capabilities of a single instance.<\/li>\n<\/ul>\n<ul>\n<li>Partitioning, or sharding, allows to scale horizontally to handle more users and requests but requires additional logic in application layer.<\/li>\n<\/ul>\n<\/li><li>Horizontal Scalability with Read Replicas or Scaling Out\n<ul>\n<li>read replicas offload read transactions from primary database and increase overall number of transactions.<\/li>\n<\/ul>\n<ul>\n<li>RDS supports read replicas to scale out elastically<\/li>\n<\/ul>\n<ul>\n<li>some common scenarios\n<ul>\n<li>Scale beyond capacity of a single DB Instance for read-heavy workloads.<\/li>\n<\/ul>\n<ul>\n<li>Handle read traffic while source DB Instance is unavailable.<\/li>\n<\/ul>\n<ul>\n<li>Offload reporting or data warehousing scenarios against a replica instead of primary DB Instance.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li><\/ul>\n\n\n\n<p><strong>RDS Security<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>securing RDS DB Instances needs a comprehensive plan<\/li><li>Secure all layers commonly in database-driven systems &#8211; infrastructure resources, database, and network.<\/li><li>Use IAM policies to limit which actions AWS administrators can perform.<\/li><li>Deploy RDS DB Instances into a private subnet within Amazon VPC limiting network access to DB instance<\/li><li>Restrict network access by ACLs and security groups and limit inbound traffic to source IP addresses.<\/li><li>Create users and grant permissions to read and write to databases.<\/li><li>Control DB access by database engine specific access control and user management mechanisms.<\/li><li>protect confidentiality of data in transit and at rest with multiple encryption capabilities<\/li><li>Security features differ slightly from one engine to another<\/li><li>Use SSL to protect data in transit.<\/li><li>Encryption at rest is possible for all engines using KMS or Transparent Data Encryption<\/li><li>all logs, backups, and snapshots are encrypted for an encrypted RDS instance.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>service to simplify the setup, operations, and scaling of a relational database on AWS. Thus, spend more time focusing on application and schema RDS offload common tasks as backups patching scaling replication streamline installation of database software and provisioning of infrastructure capacity. can launch many popular SQL database engines simplifies maintenance by automating common administrative&#8230;<\/p>\n","protected":false},"author":1,"featured_media":314,"parent":53,"menu_order":21,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[10,13,14,5],"class_list":["post-312","page","type-page","status-publish","has-post-thumbnail","hentry","tag-amazon-web-services","tag-aws-certified-solutions-architect-professional","tag-aws-exam-dumps","tag-aws-solutions-architect"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Amazon Relational Database Service (RDS) - Testprep Training Tutorials<\/title>\n<meta name=\"description\" content=\"Become AWS Certified Slutions Architect - Assocaite. 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