EC2<\/h2>\n\n\n\n
Amazon Elastic Compute Cloud or Amazon EC2, is <\/p>\n\n\n\n
- A web service that provides secure, resizable\ncompute capacity in the cloud<\/li>
- Designed to make web-scale cloud computing\neasier for developers.<\/li><\/ul>\n\n\n\n
![\"identify](\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/identify-the-core-aws-services.jpg\")
<\/figure><\/div>\n\n\n\nInstance Types<\/strong><\/p>\n\n\n\n
General Purpose<\/span> – <\/p>\n\n\n\n
- T2 – T2 instances are Burstable Performance\nInstances that provide a baseline level of CPU performance with the ability to\nburst above the baseline. <\/li>
- M4 – M4 instances are the latest generation of\nGeneral Purpose Instances. This family provides a balance of compute, memory,\nand network resources, and it is a good choice for many applications.<\/li><\/ul>\n\n\n\n
Compute Optimised – <\/p>\n\n\n\n
- C4 – C4 instances are the latest generation of\nCompute-optimized instances, featuring the highest performing processors and\nthe lowest price\/compute performance in EC2.<\/li><\/ul>\n\n\n\n
Memory Optimised – <\/p>\n\n\n\n
- X1 – X1 Instances are optimized for large-scale,\nenterprise-class, in-memory applications and high-performance databases, and\nhave the lowest price per GiB of RAM among Amazon EC2 instance types.<\/li>
- R4 – R4 instances are optimized for\nmemory-intensive applications and offer better price per GiB of RAM than R3.\nThe RAM sizes are a step below the X1s.<\/li><\/ul>\n\n\n\n
Accelerated Computing –<\/p>\n\n\n\n
- P2 – P2 instances are intended for\ngeneral-purpose GPU compute applications. <\/li>
- G3 – G3 instances are optimized for\ngraphics-intensive applications. The GPU specs are a step below the P2s.<\/li>
- F1 – F1 instances offer customizable hardware\nacceleration with field programmable gate arrays (FPGAs).<\/li><\/ul>\n\n\n\n
Storage Optimised – <\/p>\n\n\n\n
- I3 – High I\/O instances. This family includes\nthe High Storage Instances that provide Non-Volatile Memory Express (NVMe) SSD\nbacked instance storage optimized for low latency, very high random I\/O\nperformance, high sequential read throughput and provide high IOPS at a low\ncost.<\/li>
- D2 – Dense-storage instances. D2 instances\nfeature up to 48 TB of HDD-based local storage, deliver high disk throughput,\nand offer the lowest price per disk throughput performance on Amazon EC2.<\/li><\/ul>\n\n\n\n
Pricing<\/span><\/p>\n\n\n\n
Amazon EC2 is free to try. There are four ways to pay for\nAmazon EC2 instances: On-Demand, Reserved Instances, and Spot Instances. You\ncan also pay for Dedicated Hosts which provide you with EC2 instance capacity\non physical servers dedicated for your use.<\/p>\n\n\n\n
- On-Demand – With On-Demand instances, you pay\nfor compute capacity by per hour or per second depending on which instances you\nrun. No longer-term commitments or upfront payments are needed. <\/li>
- Spot Instances – Amazon EC2 Spot instances allow\nyou to bid on spare Amazon EC2 computing capacity for up to 90% off the\nOn-Demand price. Spot instances are recommended for applications that have\nflexible start and end times, applications that are only feasible at very low\ncompute prices or users with urgent computing needs for large amounts of\nadditional capacity.<\/li>
- Reserved Instances – Reserved Instances provide\nyou with a significant discount (up to 75%) compared to On-Demand instance\npricing. For applications that have steady state or predictable usage, require\nreserved capacity or can commit to using EC2 for a 1 or 3 year period, Reserved\nInstances can provide significant savings compared to using On-Demand\ninstances. <\/li>
- Per-Second Billing – With per-second billing,\nyou pay for only what you use. It takes cost of unused minutes and seconds in\nan hour off of the bill, so you can focus on improving your applications\ninstead of maximising usage to the hour.<\/li><\/ul>\n\n\n\n
Security Groups<\/strong><\/p>\n\n\n\n
- It acts as a virtual firewall that controls the\ntraffic for one or more instances. <\/li>
- After launching an instance, associate one or\nmore security groups with the instance. <\/li>
- Add rules to each security group that allow\ntraffic to or from its associated instances. <\/li>
- Modify the rules for a security group at any time; the new rules are automatically applied to all instances that are associated with the security group. <\/li><\/ul>\n\n\n\n
S3<\/h2>\n\n\n\n
- Amazon S3 is object storage <\/li>
- built to store and retrieve any amount of data\nfrom anywhere \u2013 web sites and mobile apps, corporate applications, and data\nfrom IoT sensors or devices. <\/li>
- Can deliver 99.999999999% durability, <\/li>
- Provides comprehensive security and compliance\ncapabilities <\/li>
- It has query-in-place functionality, allowing you to run powerful analytics directly on your data at rest in S3. <\/li><\/ul>\n\n\n\n
![\"identify](\"https:\/\/www.testpreptraining.ai\/tutorial\/wp-content\/uploads\/2019\/07\/identify-the-core-aws-services-01.jpg\")
<\/figure><\/div>\n\n\n\nStorage Classes<\/strong><\/p>\n\n\n\n
Amazon S3 offers a range of storage classes designed for\ndifferent use cases. Lifecycle transitions can be used to move data between\nclasses, given certain events.<\/p>\n\n\n\n
- Amazon S3 Standard – Designed for general-purpose\nstorage of frequently accessed data. Delivers low latency and high throughput,\nperfect for a wide variety of use cases. There is no retrieval fee, minimum\nobject size or minimum storage duration.<\/li>
- Amazon S3 Standard – Infrequent Access –\nDesigned for long-lived, but less frequently accessed data. For data that is\naccessed less frequently, but requires rapid access when needed. Standard – IA\noffers the high durability, throughput, and low latency of Amazon S3 Standard,\nwith a low per GB storage price and per GB retrieval fee.<\/li>
- Amazon Glacier – Designed for long-term archive.\nSecure, durable, and extremely low-cost storage service for data archiving. You\ncan reliably store any amount of data at costs that are competitive with or\ncheaper than on-premises solutions. Amazon Glacier provides three options for\naccess to archives, from a few minutes to several hours.<\/li><\/ul>\n\n\n\n
RDS<\/h2>\n\n\n\n
- Amazon Relational Database Service (Amazon RDS)\nmakes it easy to set up, operate, and scale a relational database in the cloud.\n<\/li>
- Provides cost-efficient and resizable capacity <\/li>
- Automates time-consuming administration tasks\nsuch as hardware provisioning, database setup, patching and backups.<\/li>
- Available on several database instance types –\noptimized for memory, performance or I\/O. <\/li>
- Six familiar database engines to choose from. <\/li>
- Supports encryption at rest and in transit, using\nkeys managed through KMS. <\/li>
- Backups are automated, user-initiated snapshots are available and database software is updated automatically. <\/li><\/ul>\n\n\n\n
Instance Types<\/p>\n\n\n\n
- Standard<\/li>
- Memory Optimized<\/li>
- Micro Instances<\/li><\/ul>\n\n\n\n
Database Engines<\/p>\n\n\n\n
- Amazon Aurora<\/li>
- PostgreSQL<\/li>
- MySQL<\/li>
- MariaDB<\/li>
- Oracle<\/li>
- Microsoft SQL Server<\/li><\/ul>\n\n\n\n
Supporting Services<\/h2>\n\n\n\n
AWS Database Migration Service<\/strong><\/p>\n\n\n\n
- It help you migrate databases to AWS easily and\nsecurely. <\/li>
- Source database remains fully operational during\nthe migration. <\/li>
- It can migrate your data to and from most widely\nused commercial and open-source databases. <\/li>
- It supports homogenous migrations such as Oracle\nto Oracle, or heterogeneous migrations like, Oracle to Amazon Aurora.<\/li>
- Allows you to stream data to Amazon Redshift,\nAmazon DynamoDB, and Amazon S3 from any of the supported sources <\/li>
- Supported sources
- Amazon Aurora<\/li><\/ul>
- PostgreSQL<\/li><\/ul>
- MySQL<\/li><\/ul>
- MariaDB<\/li><\/ul>
- Oracle<\/li><\/ul>
- SAP ASE<\/li><\/ul>
- SQL Server <\/li><\/ul>
- MongoDB<\/li><\/ul><\/li>
- Can also be used for continuous data replication with high-availability. <\/li><\/ul>\n\n\n\n
AWS Schema Conversion Tool<\/strong><\/p>\n\n\n\n
- It makes heterogeneous database migrations to a\nformat compatible with the target database , predictable by automatically\nconverting
- the source database schema <\/li><\/ul>
- the database code objects<\/li><\/ul>
- views<\/li><\/ul>
- stored procedures<\/li><\/ul>
- functions<\/li><\/ul><\/li>
- Objects that cannot be automatically converted\nare clearly marked <\/li>
- It can also scan application source code for\nembedded SQL statements and convert them.<\/li>
- Source database can be on-premises, or in AWS <\/li>
- Supports conversions from multiple RBMS providers to an equivalent database in RDS, or from multiple data warehouse providers to Amazon Redshift. <\/li><\/ul>\n\n\n\n
Lambda<\/h2>\n\n\n\n
- Lets you run code without provisioning or\nmanaging servers. <\/li>
- Pay only for the compute time you consume <\/li>
- No charge when your code is not running. <\/li>
- Run code for virtually any type of application\nor backend service – with zero administration.<\/li>
- Scales your application by running code in\nresponse to each trigger. <\/li>
- Code runs in parallel and processes each trigger\nindividually<\/li>
- Scaling precisely with the size of the workload.\n<\/li>
- Charged for every 100ms your code executes and the number of times your code is triggered. <\/li><\/ul>\n\n\n\n
Route 53<\/h2>\n\n\n\n
- It is highly available and scalable cloud Domain\nName System (DNS) web service. <\/li>
- It also offers Domain Name Registration <\/li>
- It will automatically configure DNS settings for\nyour domains.<\/li>
- Used to configure DNS health checks to route traffic\nto healthy endpoints <\/li>
- Independently monitor the health of your\napplication and its endpoints.<\/li>
- Amazon Route 53 Traffic Flow makes it easy for\nyou to manage traffic globally <\/li>
- various routing types supported like Latency\nBased Routing, Geo DNS, Geoproximity, and Weighted Round Robin<\/li>
- Combined all routing types with DNS Failover in\norder to enable a variety of low-latency, fault-tolerant architectures. <\/li>
- Amazon Route 53 Traffic Flow\u2019s simple visualor, helps\nto manage how your end-users are routed to your application\u2019s endpoints\u2014whether\nin a single AWS region or distributed around the globe.<\/li>
- Amazon Route 53 is integrated with Elastic Load Balancing (ELB). <\/li><\/ul>\n\n\n\n
SNS<\/h2>\n\n\n\n
Amazon Simple Notification Service (SNS) is <\/p>\n\n\n\n
- stored procedures<\/li><\/ul>
- views<\/li><\/ul>
- the database code objects<\/li><\/ul>
- the source database schema <\/li><\/ul>
- It makes heterogeneous database migrations to a\nformat compatible with the target database , predictable by automatically\nconverting
- SQL Server <\/li><\/ul>
- SAP ASE<\/li><\/ul>
- Oracle<\/li><\/ul>
- MariaDB<\/li><\/ul>
- MySQL<\/li><\/ul>
- PostgreSQL<\/li><\/ul>
- Amazon Aurora<\/li><\/ul>
- C4 – C4 instances are the latest generation of\nCompute-optimized instances, featuring the highest performing processors and\nthe lowest price\/compute performance in EC2.<\/li><\/ul>\n\n\n\n