S3 Storage Tiers To store data with efficiency while maintaining high availability, you can also select from several storage classes in S3. The following storage classes are available: S3 Standard: Provides general-purpose online storage with 99.99 percent availability and 99.999999999 percent durability (aka “11 nines”). S3 Infrequent Access: Provides the same performance as the S3 […]

AWS Service Roles AWS service roles allow AWS services to access resources in other AWS services on your behalf. A service must assume a service role to perform actions, on your behalf, on other AWS services. In some cases, AWS services provide a predefined service role out of the box—these are called service-linked roles. The list […]

Data standardization Data standardization is another scaling method that transforms the distribution of the data, so that the mean will become 0 and the standard deviation will become 1. Figure 4.4 formally describes this scaling technique, where X represents the value to be transformed, µ refers to the mean of X, and σ is the […]

Highly Available Datastores This chapter covers the following official AWS Certified SysOps Administrator – Associate (SOA-C02) exam domain: Domain 2: Reliability and Business Continuity CramSaver If you can correctly answer these questions before going through this section, save time by skimming the Exam Alerts in this section and then completing the Cram Quiz at the […]

THE AWS CERTIFIED ADVANCED NETWORKING – SPECIALTY EXAM OBJECTIVES COVERED IN THIS CHAPTER MAY INCLUDE, BUT ARE NOT LIMITED TO, THE FOLLOWING: Objective 2.3: Implement complex hybrid and multi-account DNS architectures. Implementing Hybrid and Multi-account DNS Architectures In this chapter, we will expand on the DNS and Route 53 topics covered in Chapter 2, “Domain […]

ExamAlert Although many services support Secure Sockets Layer (SSL), you should avoid using SSL in your applications because it is not considered secure anymore due to a flaw in its design. When SSL is referenced in the documentation, this might also be used as a general placeholder for “in-transit encryption.” Most AWS services fully support […]

Understanding Your AWS Environment through AWS Config With the number of services rising each year in AWS, it can be difficult to understand what resources might be running within your environment. How can you keep up with what instances you have running and where, what they are running, and whether the resources are still needed? […]

Designing secure workloads is essential to protect your data and systems and to be able to respond to security threats in a timely and successful manner. When you design a new solution on Amazon Web Services (AWS), security is the first topic you want to focus on. Whether the application that you design is a […]

Important note You will learn about these algorithms, along with the appropriate details, in the later chapters of this book. For instance, you can look at entropy and information gain as two types of metrics used by decision trees to check feature importance. Knowing the predictive power of each feature helps the algorithm define the […]

Moving through the incident response domain, you have now come to the next critical service that you need to know about, one that helps to show you what has changed after an incident has occurred—AWS Config. AWS Config and its configuration recorder can help you take a real-time inventory of most of the resources in […]