May 2022
Beginner to intermediate
756 pages
21h 30m
Korean
book
HTTP 완벽 가이드
by David Gourlry, Brian Totty, Lee Eung Jun, Sang -Il Jeong, Anshu Agarwal, Seilu Reddy, Marjorie Sayre
Content preview from HTTP 완벽 가이드
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531
20
장 리다이렉션과 부하 균형
The Definitive Guide
해 기억되어 재사용될 수 있기 때문이다. 호스트 하나에 대해 한 번의 DNS 룩업을
수행한 뒤, 그 주소를 몇 번이고 다시 사용한다. 그렇게 하면 DNS 룩업의 비용을 줄
일 수 있을 뿐 아니라, 같은 클라이언트와 계속 대화하는 것을 선호하는 서버들도
있기 때문이다. 이러한 이유로 DNS 라운드 로빈은 일반적으로 하나의 클라이언트
로 인한 부하를 제대로 분산하지 못한다. 클라이언트는 보통 같은 서버에 꽤 오랫
동안 매어 있게 될 것이다.
그러나 비록 DNS가 단일 클라이언트의 트랜잭션을 서버의 복제들에게 나눠주지
는 않더라도, 그것은 여러 클라이언트들의 부하 총량을 분산하는 적절한 작업을 수
행한다. 비슷한 요청을 하는 클라이언트의 수가 어느 정도 이상만 된다면, 부하는
모든 서버에 걸쳐 상대적으로 잘 분산될 것이다.
다른
DNS
기반 리다이렉션 알고리즘
우리는 이미 DNS가 어떻게 각 요청마다 주소 목록을 순환하는지 논했다. 그러나,
몇몇 향상된 DNS 서버는 주소의 순서를 결정하기 위해 다른 기법들을 사용한다.
그림
20
-
3
서버 팜의 모든 서버에 대한
DNS
라운드 로빈 부하 균형
207.25.71.5 207.25.71.6 207.25.71.7
207.25.71.5 207.25.71.6 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.