[ftp] 4-10 fault observer

10. Fault Observer

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10. Fault Observer

10. Fault Observer필요성

Fault Observer 가 왜 필요한가 ?

Fault Tolerance System

10. Fault ObserverFault Tolerance System 에서의 문제

문제가 뭐야 ?

로그가 남지 않잖아 !!

10. Fault ObserverFault Tolerance System 에서의 문제

10. Fault Observer해결방안

해결 방안은

The monitoring system & Report

10. Fault ObserverFault Observer 란 ?

어떻게 결함 정보를 알리는가

Publisher-Subscriber[BMR+96]

10. Fault ObserverObserver 의 사용 이유 1

시스템에서 오류가 발생하는 모든 부분에서 오류를 게시하는 것은 비효율적이다 .

10. Fault ObserverObserver 의 사용 이유 2

결함 보고서와 일반 정보를 혼용

10. Fault ObserverFault Observer 의 특징 1

다수개의 감시자를 둘 경우

서로 중복성을 제공하거나 서로 다른 유형의 장애 컬렉션을 다룰 것이다 .

10. Fault ObserverFault Observer 의 특징 2

감시자는 꼭 시스템의 일부일 필요는 없음

10. Fault ObserverFault Observer 의 특징 3

모든 오류는 결함 감시자에게 보고되도록 결함 감시자는 모든 관계자에게 오류의 정보를 게시

로그 파일에 대한 참고 시스템이 로그파일에 대한 처리 전략을 가지고 있는지

문제 : 로그 파일이 꽉 차서 생기는 문제 해결책

순환로그 (a circular log) 순환하는 로그의 집합 (a set of logs that are

cycled between)

10. Fault Observer로그 파일 관리

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[ftp] 4-10 fault observer

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