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Amazon RDSNguyen Trung Thanh

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Outline

Concept RDS Features, Functionality Scalability Compare to SQL Azure Conclusion Q&A

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Solution for Database Build your own

For example - MySQL on EC2, Postgres , … Acquire instances Install the database according to your architecture Self manage your database

Database-as-a-Service For example - Amazon RDS,

Xeround, Azure SQL…. ,

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Amazon RDS

RDS = Relational Data Storage A Service make it easy to

+ Set up

+ Operate

+ Scale

Relational Database on Cloud

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Elasticity

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Similarities

Web Portal

Your App

Change Connection String

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RDS Features, Functionalities

Pre-configured ParametersMonitoring and MetricsAutomatic Software Patching Automated BackupsDB SnapshotsPush-Button Scaling Automatic Host Replacement Replication: two features Multi-AZ Deployment, Read Replica

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Amazon RDS Tooling MySQL

WorkBench All the Oracle

Tools

AWS Management Console CLI ( Command Line Interface ) APIs

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Scalability-Two Types of Scaling

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Scalability – Scale Up vs. Scale Out

Scale Up/Vertical Scaling Select next available configuration (EC2, RDS) Relatively simple but limited scalability

Scale Out/Horizontal Scaling Add additional resources Complicated but high scalability RDS Read replicas

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Amazon RDS Scale Up

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Shared Everything vs. Shared Nothing

Shared Everything Scale throughput but limited due to shared resources Storage and networking limitations in the cloud ScaleDB

Shared Nothing Horizontal data partition / sharding Unlimited scalability Many design and implementation

challenges

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Stategies for scaling

Read Replicas Read replicas, also known as master-slave

deployments. A good option for applications with a high read to write ratio.

A single master database is responsible for handling all writes.

The writes are then replicated to the slaves which are designated

to handle just reads.

Partioning/Sharding Breaking a larger database up into smaller databases + Splitting tables that are not joined in the same query onto different

hosts

+ Duplicating a table across multiple hosts and then splitting where

a row goes.

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Read Replicas

Master

R

RR

Load Balancer

RR

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Read Replicas

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Multi-AZ DeployementAvailability Zones: are distinct locations within

a Region that are engineered to be isolated from failures in other Availability Zones.

Run a DB Instance as a Multi-AZ deployment, the “primary” serves database writes and reads. Amazon RDS provisions and maintains a “standby” behind the scenes, which is an up-to-date replica of the primary. The standby is “promoted” in failover scenarios. After failover, the standby becomes the primary and accepts your database operations.

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Multi-AZ Deployement

Double the price

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Sharding

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ScaleBase-Auto Sharding

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Compare to SQL Azure

Amazon RDS

Less Cloudy

Built on MySQL/Oracle

Amazon RDS wins Scale UpSQL Azure

More Cloudy

Built on SQL Server

SQL Azure wins Scale Out

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Pricing

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Main Amazon RDS Pricing - MySQL

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Main SQL Azure Pricing

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ConclusionSimple to DeployManagedCompatibleScalableReliableDesigned for use with other Amazon Web

Services SecureInexpensive: On-Demand DB Instances, Reserved DB

Instances

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Q&A