21/10/02(토) 스터디 특강 자료입니다. Covenant: https://github.com/KoEonYack <><

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Covenant
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2. - Name. Covenant Ko
- Company. 11번가
- Github 용감한친구들 Organization Founder & Maintainer. https://github.com/brave-people
- Github. https://github.com/KoEonYack
- Tech Blog. https://covenant.tistory.com/ (누적 방문 51만)

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https://news.mit.edu/2019/discovering-deep-learning-mit-iap-course-0315

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HW
Kernel
Application

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HW
Kernel
Application

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HW
Kernel
Application
1. CPU ( ‒ )
3. CPU ?
2. CPU ?
( , )
4. CPU ?

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HW
Kernel
Application
1.
3.
2.
4.
속도속도..
속도속도..
용량용량 속도속도..
용량용량 속도속도..

11. ?
HW
Kernel
Application
1. ? (HDD )
2. ?
3. IO

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HW
Kernel
Application
교과서는 CPU에서 멀어지는 방향으로 서술

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HW
Kernel
Application
Operating System Zone

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HW
Kernel
Application
0. OS
- Application HDD .
-
- fwrite();
, ➔
Program
Operating System Zone
signal interrupt

15. ?
HW
Kernel
Application
Operating System Zone
1. Application ?
#
# CPU ? ➔
# ➔ ,

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HW
Kernel
Application
Operating System Zone
1. Application ?
#
# CPU ? ➔
# ➔ ,
https://www.slideshare.net/ienvyou/java-performance-tuning-46792397

17. ?
HW
Kernel
Application
Operating System Zone
2. Application
# ➔
# ➔
# ➔ ,
# ➔ ?( , )
https://help.sap.com/viewer/index

18. ?
HW
Kernel
Application
Operating System Zone
2. Application
# ➔
# ➔
# ➔ ,
# ➔ ?( , )
https://help.sap.com/viewer/index

19. ?
HW
Kernel
Application
Operating System Zone
2. Application
# ➔
# ➔
# ➔ ,
# ➔ ?( , )
http://underkg.co.kr/news/2854936

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HW
Kernel
Application
Operating System Zone
3. Disk
# ➔

21. ?
HW
Kernel
Application
Program
Input Output
Process

22. ?
HW
Kernel
Application
Program
Input Output
Process
https://en.wikipedia.org/wiki/IPO_model
Input Process Output

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HW
Kernel
Application
Program
Input Output
Process
,

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HW
Kernel
Application
,
Program
Input Output
Process
정렬, 탐색, 문자열, 그래프 등 수십, 수백 수천년 전에 끝난 문제

25. ?
HW
Kernel
Application
,
시간 복잡도! 공간 복잡도!
Program
Input Output
Process
시간 복잡도 = CPU, 공간 복잡도 = RAM
주어진 문제에 따라 Trade Off 발생
컴퓨터의 자원은 유한하다라는 것을 몸소 알게됨

26. ?
HW
Kernel
Application
,
Program
Input Output
Process
어떤 값이(Input) 프로그램에 주어지는지, 어떤 값을 출력(Output)해야하는지에 따라 알고리즘 선택
Input이 2차원 배열 10x10, 2차원 배열 1억 x 1억일 때 같은 알고리즘 사용하기 어려움

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HW
Kernel
Application
,
Program
Input Output
Process
빅오(Bing-O)를 통한 알고리즘 성능 표현

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HW
Kernel
Application
,
Program
Input Output
Process
Application의 병목 지점 탐지, 개선
(with 프로파일링 도구)

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HW
Kernel
Application
,
Program
Input Output
Process

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HW
Kernel
Application
1. Boolean algebra
3. SQL
4. RDB
쿼리는 사실 수학이었다.
#ACID
#정규화
#트랜잭션
#Isolation level
# 등등..
2. Modeling # 현실의 모델을 스키마로 변환하는 방법
# E-R Diagram

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HW
Kernel
Application
HW
Kernel
Application
!

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HW
Kernel
Application
HW
Kernel
Application
L7
L6
L5
L4
L3
L2
L1
HTTP
SSL(TLS)
TCP, UDP
IP, ARP, ICMP
Ethernet
OSI 7 Layer: 7

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HW
Kernel
Application
HW
Kernel
Application
?
암호와 알고리즘
디지털 서명

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HW
Kernel
Application
HW
Kernel
Application
?
시큐어코딩
어플리케이션 보안
보안 빵구

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HW
Kernel
Application
HW
Kernel
Application
?
테스팅
정적 / 동적 분석

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HW
Kernel
Application
HW
Kernel
Application
?
DDOS 방지
클라우드 보안
방화벽
DMZ

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HW
Kernel
Application
Black Box Zone
Black Box
Server Zone
How to Solve?
Black Box
Infra Zone HW
Kernel
Application
Black Box
Client Zone
제발 잘되라

38. ?
HW
Kernel
Application
Black Box Zone
Black Box
Server Zone
페이지 로딩속도가 느려요
이미지가 깨져요
접속이 안되요
제가 작성한 글이 안보여요
How to Solve?
해외 접속 잠깐 풀어주세요
Black Box
Infra Zone HW
Kernel
Application
Black Box
Client Zone

39. 뿌리깊은 컴퓨터공학
코드의 뼈대
기술의 활용
Computer Architecture Operating System Algorithm
Database
Network
OOP Test Code Architecture
Kafka
Clean Code
Spring Security
Spring Batch Spring Cloud
Docker Data Pipeline ORM
More..

40. Up in the air
Computer Science for Backend Developer
Essential
Rocket Infra for Backend Developer
Zero to Hero

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Covenant