해시 키 재배치(rehash) 문제
server index = hash(key) % N
서버가 삭제하거나 추가했을 때 N 갯수가 바뀌었을 때 기존에 저장된 서버가 아닌 엉뚱한 서버로 key들이 저장되어 대규머 캐시 미스가 발생할 가능성이 생감
![[스터디] 대규모 시스템 설계-22.jpg](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/1fed4406-978a-4201-92fb-c94dc8189dcd/%E1%84%89%E1%85%B3%E1%84%90%E1%85%A5%E1%84%83%E1%85%B5_%E1%84%83%E1%85%A2%E1%84%80%E1%85%B2%E1%84%86%E1%85%A9_%E1%84%89%E1%85%B5%E1%84%89%E1%85%B3%E1%84%90%E1%85%A6%E1%86%B7_%E1%84%89%E1%85%A5%E1%86%AF%E1%84%80%E1%85%A8-22.jpg)
![[스터디] 대규모 시스템 설계-23.jpg](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/2ca54cea-6bda-429d-a711-84dd7e069243/%E1%84%89%E1%85%B3%E1%84%90%E1%85%A5%E1%84%83%E1%85%B5_%E1%84%83%E1%85%A2%E1%84%80%E1%85%B2%E1%84%86%E1%85%A9_%E1%84%89%E1%85%B5%E1%84%89%E1%85%B3%E1%84%90%E1%85%A6%E1%86%B7_%E1%84%89%E1%85%A5%E1%86%AF%E1%84%80%E1%85%A8-23.jpg)
![[스터디] 대규모 시스템 설계-24.jpg](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/eb69bb20-1fb1-408d-bda3-363ec1c672cd/%E1%84%89%E1%85%B3%E1%84%90%E1%85%A5%E1%84%83%E1%85%B5_%E1%84%83%E1%85%A2%E1%84%80%E1%85%B2%E1%84%86%E1%85%A9_%E1%84%89%E1%85%B5%E1%84%89%E1%85%B3%E1%84%90%E1%85%A6%E1%86%B7_%E1%84%89%E1%85%A5%E1%86%AF%E1%84%80%E1%85%A8-24.jpg)
![[스터디] 대규모 시스템 설계-25.jpg](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/7f7d60c6-46c7-4092-9712-b6321bb98206/%E1%84%89%E1%85%B3%E1%84%90%E1%85%A5%E1%84%83%E1%85%B5_%E1%84%83%E1%85%A2%E1%84%80%E1%85%B2%E1%84%86%E1%85%A9_%E1%84%89%E1%85%B5%E1%84%89%E1%85%B3%E1%84%90%E1%85%A6%E1%86%B7_%E1%84%89%E1%85%A5%E1%86%AF%E1%84%80%E1%85%A8-25.jpg)
![[스터디] 대규모 시스템 설계-26.jpg](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/f005021a-b1ab-49c7-9207-bd49162576c0/%E1%84%89%E1%85%B3%E1%84%90%E1%85%A5%E1%84%83%E1%85%B5_%E1%84%83%E1%85%A2%E1%84%80%E1%85%B2%E1%84%86%E1%85%A9_%E1%84%89%E1%85%B5%E1%84%89%E1%85%B3%E1%84%90%E1%85%A6%E1%86%B7_%E1%84%89%E1%85%A5%E1%86%AF%E1%84%80%E1%85%A8-26.jpg)
![[스터디] 대규모 시스템 설계-27.jpg](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/97424b77-ff08-4fad-aebc-e974ac8ce3e8/%E1%84%89%E1%85%B3%E1%84%90%E1%85%A5%E1%84%83%E1%85%B5_%E1%84%83%E1%85%A2%E1%84%80%E1%85%B2%E1%84%86%E1%85%A9_%E1%84%89%E1%85%B5%E1%84%89%E1%85%B3%E1%84%90%E1%85%A6%E1%86%B7_%E1%84%89%E1%85%A5%E1%86%AF%E1%84%80%E1%85%A8-27.jpg)