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                         Overview of Amazon Web Services Introduction The AWS Cloud provides a broad set of infrastructure services. What are infrastructure services?such as computing power, storage options, networking and databases. How infrastructure services are delivered? on-demand, available in seconds, with pay-as-you-go pricing. In 2006, Amazon Web Services (AWS) began offering IT infrastructure services to businesses in the form of web services — now commonly known as cloud computing.   Why we need cloud computing service?replace up-front capital infrastructure expenses. A cloud services platform such as Amazon Web Services owns and maintains the network-connected hardware required for these application services, while you provision and use what you need via a web application . As cloud computing has grown in popularity, several different models and deployment strategies have emerged to help ...

                                            Amazon EC2 The Amazon EC2 simple web service interface allows you to obtain and configure capacity with minimal friction. Amazon EC2 works in conjunction with Amazon VPC to provide security and robust networking functionality. Connect your existing IT infrastructure to resources in your VPC using industry-standard encrypted IPsec virtual private network (VPN) connections. Dedicated Instances are Amazon EC2 instances that run on hardware dedicated to a single customer for additional isolation. Dedicated Hosts , which are physical servers with EC2 instance capacity fully dedicated to your use. Dedicated Hosts can help you address compliance requirements and reduce costs by allowing you to use your existing server-bound software licenses. You pay for the compute capacity you actually consume .  EC2 Instance Purch...

EC2 instance pricing options Virtual machines on cloud provision in minutes through web portal. EC2 standard instances charges by hour in windows/Linux and in seconds also for linux. Reserved instances for known need that will arise for short term. Spot instances are available for bidding from a pool of available instances.. Dedicated hosts are physical server dedicated for your use. EC2 standard (OnDemand) For application implementation with low cost and leveraging cloud flexibility. Pay as you go.  Application that should not be interrupted. Application being developed or tested on EC2 for the first time. No upfront payment. Reserved instance For application with steady usage or predictable usage. That need reserved capacity at certain points of time. Upfront payment to reduce total cost of computing. Standard RI's (up to 75% of on demand) Convertible RI's (up to 54% of on demand) Scheduled RI's Spot instances For applications that ...

Security Group All inbound traffic is blocked by default. All outbound traffic is allowed. Changes to security group takes effect immediately. You can have any number of EC2 instances within a security group. Multiple security group attached to an EC2 instance. Security groups are STATEFUL (A service that is actively processing state data). You can not block specific IP address using security group instead use NACL. You can specify allow rules but not deny rules.

EBS -Elastic block storage To create block storage volumes. Attach to EC2 instance and create file system, run database etc. Automatic backup or storage replicated. Cannot mount 1EBS volume to multiple EC2 instances, instead use EFS. EBS volume types General purpose SSD (GP2) Balances both price and performance. Ratio 3IOPS per GB up to 10K IOPS. Burst up to 3000 IOPS Provisioned IOPS SSD (IO1) For I/O intensive application like RDBMS Use if application needs above 10K IOPS. Can support up to 20K IOPS per volume. Magnetic storage (Old school) Throughput optimised HDD (ST1) Frequently accessed workloads. For Big data, Data warehouse, Log processing. Can not be boot volume. Cold HDD (SC1) Lowest of all for infrequently accessed workloads.  File server Can not be boot volume. Magnetic storage (Standard) Lowest cost per GB of all that is bootable. Magnetic volumes ideal for workloads.