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Section 8_High Availability and Scalability: ELB & ASG -Scalability means that an application / system can handle greater loads by adapting. There are two kinds of scalability: • Vertical Scalability • Horizontal Scalability (= elasticity) Vertical Scalability - Increasing the size of the instance - Vertical scalability is common for non-distributed systems such as database - RDS, Elasticache are vertical scalability - Usually a limit to how much yo.. 2023. 9. 15.
Section 7 : Instance Storage EBS : An EBS (Elastic Block Store) Volume is a network drive you can attach to your instances while they run and allows data to persist even after their termination. - They can only be mounted to instance at a time and bound to a specific AZ (Free tier is 30gb) - It can be detached from an EC2 and attached to another one quickly - To move AZ you first need to snapshot it - Get billed for all the.. 2023. 8. 29.
Section 6 : EC2 Solutions Private vs public IP (IPv4) Ipv4 is still the most common format used online and IPv6 is newer and solves problems for iot. Public IP: • Public IP means the machine can be identified on the internet (WWW) • Must be unique across the whole web (not two machines can have the same public IP). • Can be geo-located easily Private IP: • Private IP means the machine can only be identified on a private .. 2023. 7. 26.
Section 5 : EC2 Fundamentals_part 2 EC2 Instances Purchasing options - On-demand Instances – short workload, predictable pricing, pay by second - Reserved (1 & 3 years) • Reserved Instances – long workloads • Convertible Reserved Instances – long workloads with flexible instances - Savings Plans (1 & 3 years) –commitment to an amount of usage, long workload - Spot Instances – short workloads, cheap, can lose instances (less reliab.. 2023. 7. 23.
Section 5 : EC2 Fundamentals_part 1 AWS Budget setup : For IAM user -> Giver permission to accept bills and payments for access Can setup your own budget ranging from free ~ to customized amount Amazon EC2 Basics EC2 = Elastic Compute Cloud = Infrastructure as a Service Consists in the capability of : - Renting virtual machines (EC2) - Storing data on virtual drives (EBS) - Distributing load across machines (ELB) - Scaling the ser.. 2023. 7. 23.
Section 4 : IAM & AWS CLI IAM : Users & Groups - Users are people within your organization and can be grouped - Groups only contain users, not other groups - Users don’t have to belong to a group and user can belong to multiple groups IAM : Permissions - Users or groups can be assigned JSON documents called policies - These policies define the permissions of the users and you apply the least privilege principle : don’t g.. 2023. 7. 22.

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