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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 6 : EC2 - Solutions Architect Associate level
46. Private vs Public vs Elastic IP
- ipv4 = most common format used online
- ipv4 is used mostly over iot
- public ip 는 public ip끼리 // private ip는 내부, private ip끼리 통신 가능
- public ip must be unique, is accessible by www internet
- elastic ip = if you need have a fixed public ip for your instance, use elastic ip
- you can have only 5 elastic ip per account, try to avoid uisng elastic ip
- use random public ip and register dns / load balancer
48. EC2 Placement Groups
- control over ec2 instance placement strategy
- cluster - clusters instances into a low-latency group in a single availability zone
- spread - spreads instances across underlying hardware = ex.critical application
- partition - spreads instance across many different partitions
- Placement Groups : Cluster
- Same AZ
- great network very low latency between each instances
- if az fails, all instances will fail
- use cases : big data jobs, low latency
- Placement Groups : Spread
- spread across az
- different hardware for each instance
- limited to 7 instances per az per placement group
- use cases : high availability, critical applications, if one fails it will not effect other instances
- Placement Groups : Partition
- Partitions safe from rack failure
- can span across multiple azs
- up to 100s of ec2
- partitions do not share same rack
- if one partition goes down, other partitions are safe
- use cases : big data applications, cassandra, kafka
50. Elastic Network Interfaces (ENI)
- logical component in a VPC representing a virtual network card
- can create eni independently and attach them on the fly on ec2 failover
- bound to a specific az
- when are ENI used ? eni allows instances to be attached to different subnets + allowing for cheap high availability for instances where one instance fail, you can assign the eni to another instance.
53. EC2 Hibernate
- ec2 stop - data on disk(ebs) is kept intact
- ec2 terminate - ebs volumes are set-up to be destroyed and lost
- on starting instance, steps are
- os boots
- ec2 user data script is run
- os boots up
- application starts
- caches take in place
- ec2 hibernate - ram state is preserved, instance boot is very fast, root ebs volumes must be encrypted
- use cases - long running prcoesses, saving the ram state
- can not be hibernated more than 60 days
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/
blog.naver.com
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