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19/09/2019

AWS Certification Pre-Exam Knowledge Refresh- Part 3



Amazon Redshift is a fully managed, petabyte-scale data warehouse service in the cloud. You can start with just a few hundred gigabytes of data and scale to a petabyte or more. 
Just like S3, Amazon redshift cluster is HA with in a region. For HA across regions, you need to enable cross-region replication.

DynamoDB is  NoSQL database service. Dynamo DB is a managed service which does redundancy across Multiple Azs in a region.  In its capacity Tab you can configure auto scaling based on read and write capacity thresholds.
You cannot trigger a Lambda function based on new data arriving into DynamoDB table, where as Dynamo Stream can  trigger a Lambda when new data arrives. By default Dynamo Stream is not enabled , you need to do it exclusively.

Amazon Aurora is a MySQL and PostgreSQL compatible relational database built for the cloud, that combines the performance and availability of high-end commercial databases with the simplicity and cost-effectiveness of open source databases.

AWS Config: you can discover existing and deleted AWS resources, determine your overall compliance against rules, and dive into configuration details of a resource at any point in time

AWS X-Ray helps developers analyze and debug distributed applications in production or under development, such as those built using microservice architecture. With X-Ray, you can understand how your application and its underlying services are performing so you can identify and troubleshoot the root cause of performance issues and errors.
Make a note: X-Ray is for tracing, Cloud trail is for logging.

Amazon Simple Workflow Service (SWF) is a web service that makes it easy to coordinate work across distributed application components. Amazon SWF enables applications for a range of use cases, including media processing, web application back-ends, business process workflows, and analytics pipelines, to be designed as a coordination of tasks. 
SWF has Max timeout as 1 year, but you can change it to even a day. 

Only the Enterprise plan includes the AWS Support Concierge Service.

AWS Trusted Advisor is an application that draws upon best practices learned from AWS’ aggregated operational history of serving hundreds of thousands of AWS customers. Trusted Advisor inspects your AWS environment and makes recommendations for saving money, improving system performance, and closing security gaps.

The developer support plan provides general guidance when you request Architecture Support.
With the business support plan, architectural guidance is contextual to your use-cases.
 In relation to architectural guidance, the enterprise support plan provides consultative review and guidance based on your applications.

Amazon EC2 Container Registry (ECR) is a fully managed Docker container registry that makes it easy for developers to store, manage, and deploy Docker container images. Amazon ECR is integrated with Amazon EC2 Container Service (ECS), simplifying your development to production workflow. 

AWS Systems Manager provides a unified user interface so you can view operational data from multiple AWS services and allows you to automate operational tasks across your AWS resources.

Amazon Athena is an interactive query service that makes it easy to analyse data in Amazon S3 using standard SQL.
Amazon S3 Select is designed to help analyse and process data within an object in Amazon S3 buckets, faster and cheaper. It works by providing the ability to retrieve a subset of data from an object in Amazon S3 using simple SQL expressions.
Amazon Redshift Spectrum: allows you to directly run SQL queries against exabytes of unstructured data in Amazon S3. 
All above 3 services allows you to query S3 objects without moving them form S3 to other storages.

AWS uses the techniques detailed in DoD 5220.22-M ("National Industrial Security Program Operating ManuaI ") or NIST 800-88 ("GuideIines for Media Sanitization") to destroy data as part of the decommissioning process. All decommissioned magnetic storage devices are degaussed and physically destroyed in accordance with industry-standard practices.

AWS Application Discovery Service helps systems integrators quickly and reliably plan application migration projects by automatically identifying applications running in on-premises data centres, their associated dependencies, and their performance profiles. 

Snowball is a petabyte-scale data transport solution that uses secure devices to transfer large amounts of data into and out of the AWS Cloud. Not Exabytes.

Snowball comes in 50TB and 80TB versions in US and only 80TB in all other regions. Snowball Edge comes in 100TB.
80TB snowball Device can store only 72TB of data and a Snowball edge 100TB can store only 83TB.
Any data sizes less than 10TB shouldn't use snowball as its not economical for that size.

AWS Snowmobile is an Exabyte-scale data transfer service used to move extremely large amounts of data to AWS. 

S3 Transfer Acceleration enables fast transfers of files over long distances between your client and an S3 bucket. 


AWS Certificate Manager is a service that lets you easily provision, manage, and deploy public and private Secure Sockets Layer/Transport Layer Security (SSL/TLS) certificates for use with AWS services and your internal connected resources. 

AWS TCO (Total Cost of Ownership) Calculator is a free tool provided by AWS that allows you to compare your current on-premises cost vs. estimated AWS cost.

AWS Cloud Adoption Framework (AWS CAF) to help organizations design and travel an accelerated path to successful cloud adoption.

AWS Service Catalog allows organizations to create and manage catalogues of IT services that are approved for use on AWS. These IT services can include everything from virtual machine images, servers, software, and databases to complete multi-tier application architectures.
             
                                                                                                                           Here is the link for Part 4



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