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2024년 SAA-C03 자격증 준비하면서 필요한 노트 정리했습니다
강의는 유데미 "Ultimate AWS Certified Solutions Architect Associate SAA-C03" 통해 공부했습니다
https://www.udemy.com/course/aws-certified-solutions-architect-associate-saa-c03
같이 공부해서 합격해보자구요 !
Section 5 : EC2 Fundamentals
30. EC2 Basics
- Elastic Compute Cloud = Infrastructure as a Service
- Virtual machine = ec2
- Storing data on a virutal drvie = ebs
- Distributing load across machines = elb
- Scaling the services using an auto-scaling group = asg
- core ec2 settings
- os
- compute power & cores = cpu
- ram
- network attached = ebs & efs
- hardware = ec2 instance store
- firewall rules
- bootstrapping means launching commands when a machine starts
32. Create an EC2 instance ...
33. EC2 Instance types Basics
- Seven types of instance types, more detailed can be seen at https://aws.amazon.com/ec2/instance-types/
- Instance naming conventions
- General Purpose -> a balance between compute, memory and networking
- t2.micro free-tier eligible instance is a general purpose type instance
- Compute Optimized -> great for compute intensive tasks
- batch processing workloads
- media transcoding
- high performance web servers
- dedicated gaming servers
- Memory optitmized -> fast performance that needs large data sets in memory
- high performance, relational/non-relational databases
- web scale cache stores
- Storage Optimized -> great for storage -intensive tasks that require high sequential read and write access to large data sets on local storage
- relational & nosql db
- cache for in-memory db (redis)
34. Security Groups & Classic Ports Overview
- Fundamental of network security in AWS
- controls how traffic is allowed in or out of ec2 instances
- Regulates
- ports
- ip range ipv4 & ipv6
- control inbound, outbound network
- can be attached to multiple instances
- it's good to maintain one seperate security group for ssh acess
- if it's a time out related issue, it's mostly likely to be a security issue
- if you receive an error like connection refused, it is an application error which means there is no security issue
- all inbound traffic is blocked by default
- all outbound traffic is authorized by default
42. EC2 Instance Roles Demo
- Instance -> action -> security -> modify iam roles 여기서 role 인스터스별 부여할 수 있음
43. EC2 Instance Purchasing Options
- There are quiet a few purchasing options available for ec2
- On-Demand Instances - predictable pricing, pay by sec
- Reserved - long workloads
- Savings Plans - commitment to an amount of usage
- Spot Instances - short workloads, cheap but can lose instances
- Dedicated Hosts - book an entire physical server, control instance placement
- Dedicated Instances - no other customers will share your hardware
- Capacity Reservations - reserve capacity in a specific AZ for any duration
- EC2 on demand
- pay for what you use
- linux & windows = pay by the second
- all other = pay by the hour
- has the highest cost but no upfront payment
- pay for what you use
- EC2 reserved instances
- up to 72% discount
- reservation period = 1 year(+) or 3 year(++)
- payment options = no upfront (+) , partial (++) , all unfront (+++)
- You cna buy and sell in the instance at Reserved Instance Marketplace
- there is also a convertible reserved instance
- can change os, instance type etc
- but discount is less than regular reserved instance, up to 66%
- EC2 Savings Plans
- Long term usage like ec2 reserved
- commit to a certain type of usage
- 10$ per hour for 1 or 3 years
- Locked to a instance family & region
- Flexible at instance size, os and tenancy
- EC2 Spot Instances
- discount of up to 90%
- can lose the instance at any time
- useful for workloads that are resilient to failure
- batch jobs
- data analysis
- image processing
- most cost-efficient
- MUST IT IS NOT SUITABLE FOR DATABASES
- EC2 Dedicated hosts
- A physical server fully dedicated to your use
- the most expensive option
- compliance requirements and use your existing server-bound software licenses
- BYOL ( Bring your own license)
- EC2 Dedicated Instances
- Instances run on hardware that's dedicated to you
- May share the hardware with other instances
- EC2 Capacity Reservations
- On-Demand instances capacity in a specific AZ for any duration
- chaged at on-demand rate, whether instance is running or not
- suitable for short-term, uninterrupted workloads that needs to be in a specific AZ
44. Spot Instances & Spot Fleet
- Up to 90% discount, instance is usable up until spot price > max price setting
- When goes over the limit, you can either choose to stop or terminate your instance within 2 minute given time
- Spot fleets are best option since spot fleet allows us to automatically request spot instances with lowest prices
- Spot fleet strategies allocating spot instances : lowest price, diversified, capacity optimized, price capacity optimized
- spot fleets are set of spot instances & optionally on-demand instances
Ex questions : you're planning to migrate on-premise to aws, company has strict requirements requiring to run on dedicated servers, also need to use your own server bound software.
A : dedicated hosts
같이 파이팅해서 합격해봅시당 ㅎㅎ
저는 24년 10월 중순에 시험 볼 예정입니다 ! (후기 남기도록 하겠습니다 후후)
토니이츠얼랏 : 네이버 블로그
너무너무너무 많이 먹는 토니입니당 :) 개발 블로그도 방문해주세용 (제꺼에요 :p) https://tonyzorz.tistory.com/
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