4.1 System Interface

4.1 System Interface

• Dynamo 는 간단한 Key 를 통해 연관된 객체를 저장합니다.

• 따라서 Interface 는 get() 과 put() 두가지 작업을 노출합니다.

get(key)

• locates the object replicas associated with the key in the storage system and returns a single object or a list of objects with conflicting versions along with a context.

put(key)

• determines where the replicas of the object should be placed based on the associated key, and writes the replicas to disk.

Context

• 시스템 메타 데이터를 인코딩합니다.

• 호출자에게 불투명 한 객체이며 다음과 같은 정보를 포함합니다.

• The context information is stored along with the object so that the system can verify the validity of the context object supplied in the put request.

Dynamo

• Dynamo는 호출자가 제공 한 키와 객체를 모두 처리합니다.

• It applies a MD5 hash on the key to generate a 128-bit identifier, which is used to determine the storage nodes that are responsible for serving the key.