Szukana fraza: [Abstract = "This paper discusses the requirements for an introspection layer in a data management system for large\-scale distributed infrastructures. We focus on the case of BlobSeer, a large\-scale distributed system for storing massive data. The paper explains why and how to enhance BlobSeer with introspective capabilities and proposes a three\-layered architecture relying on the MonALISA monitoring framework."]