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178
Ceph: A scalable, highperformance distributed system,” in OSDI,
, 2006
"... Abstract We have developed Ceph, a distributed file system that provides excellent performance, reliability, and scalability. Ceph maximizes the separation between data and metadata management by replacing allocation tables with a pseudo-random data distribution function (CRUSH) designed for hetero ..."
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Cited by 275 (32 self)
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for heterogeneous and dynamic clusters of unreliable object storage devices (OSDs). We leverage device intelligence by distributing data replication, failure detection and recovery to semi-autonomous OSDs running a specialized local object file system. A dynamic distributed metadata cluster provides extremely
Distributed Metadata with the AMGA Metadata Catalog
- In Workshop on NextGeneration Distributed Data Management - HPDC-15
, 2006
"... Catalog Services play a vital role on Data Grids by allowing users and applications to discover and locate the data needed. On large Data Grids, with hundreds of geographically distributed sites, centralized Catalog Services do not provide the required scalability, performance or fault-tolerance. In ..."
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-tolerance. In this article, we start by presenting and discussing the general requirements on Grid Catalogs of applications being developed by the EGEE user community. This provides the motivation for the second part of the article, where we present the replication and distribution mechanisms we have designed
Metadata Control Agent approach for Replication in Grid Environments
"... Abstract- since grid environment is dynamic, network latency and user requests may change. In order to provide better communication, access time and fault tolerant in decentralized systems, the replication is a technique to reduce access time, storage space. The objective of the work is to propose a ..."
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Abstract- since grid environment is dynamic, network latency and user requests may change. In order to provide better communication, access time and fault tolerant in decentralized systems, the replication is a technique to reduce access time, storage space. The objective of the work is to propose
Security in distributed metadata catalogues
"... Catalogue Services provide the discovery and location mechanisms that allow users and applications to locate data on Grids. Replication is a highly desirable feature in these services, since it provides the scalability and reliability required on large Data Grids and is the basis for federating cata ..."
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Cited by 3 (0 self)
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basis, we then propose a security architecture for replicated Grid Catalogues, which, among other features, supports partial and total replication of the security mechanisms on the master. The implementation of this architecture in the AMGA Metadata Catalogue of the EGEE project is then described
V.: The AMGA metadata service
- Journal of Grid Computing
"... Abstract. We present the AMGA Metadata Catalogue, which was developed as part of the EGEE (Enabling Grids for EsciencE) project's gLite Grid Middleware. AMGA provides access to metadata for les stored on the Grid, as well as a simplied general access to relational data stored in database syste ..."
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Cited by 6 (0 self)
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amounts of metadata, as well as the needs for security of the Biomedical community. AMGA therefore tightly integrates ne grained access control making use of a Virtual Organisation management system. In addition, it oers advanced federation and replication features to increase dependability, performance
Gnothi: Separating Data and Metadata for Efficient and Available Storage Replication
"... Abstract: This paper describes Gnothi, a block replication system that separates data from metadata to provide efficient and available storage replication. Separating data from metadata allows Gnothi to execute disk accesses on subsets of replicas while using fully replicated metadata to ensure that ..."
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Cited by 8 (0 self)
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Abstract: This paper describes Gnothi, a block replication system that separates data from metadata to provide efficient and available storage replication. Separating data from metadata allows Gnothi to execute disk accesses on subsets of replicas while using fully replicated metadata to ensure
Replication-based highly available metadata management for cluster file systems
- In Proc. Intl. Conf. Cluster Comp. (CLUSTER
, 2010
"... Abstract—In cluster file systems, the metadata management is critical to the whole system. Past researches mainly focus on journaling which alone is not enough to provide high-available metadata service. Some others try to use replication, but the extra latency accompanied is a main problem. To guar ..."
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Cited by 4 (0 self)
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Abstract—In cluster file systems, the metadata management is critical to the whole system. Past researches mainly focus on journaling which alone is not enough to provide high-available metadata service. Some others try to use replication, but the extra latency accompanied is a main problem
Publishing and Consuming Provenance Metadata on the Web of Linked Data
- In: Proc. of 3rd Int. Provenance and Annotation Workshop
, 2010
"... Abstract. The World Wide Web evolves into a Web of Data, a huge, globally distributed dataspace that contains a rich body of machineprocessable information from a virtually unbound set of providers covering a wide range of topics. However, due to the openness of the Web little is known about who cre ..."
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Cited by 44 (4 self)
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created the data and how. The fact that a large amount of the data on the Web is derived by replication, query processing, modification, or merging raises concerns of information quality. Poor quality data may propagate quickly and contaminate the Web of Data. Provenance information about who created
K.: Scalability of replicated metadata services in distributed file systems
, 2012
"... Abstract. There has been considerable interest recently in the use of highly-available configuration management services based on the Paxos family of algorithms to address long-standing problems in the manage-ment of large-scale heterogeneous distributed systems. These problems include providing dis ..."
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Cited by 1 (0 self)
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unexplored. One such area is the man-agement of metadata in distributed file systems. In this paper we show that a Paxos-based approach to building metadata services in distributed file systems can achieve high availability without incurring a performance penalty. Moreover, we demonstrate that it is easy
Replicable Security Monitoring: Visualizing Time-Variant Graphs of Network Metadata
"... Abstract. Monitoring a computer network's security state is a difficult task as network components rarely share their information. The IF-MAP specification defines a client/server-based protocol that enables network components to share security information among each other, which is represented ..."
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. The evolution of such a graph, however, embodies valuable information for the analysis of past incidents and attacks on the network infrastructure. In this paper we introduce a software framework to visualize MAP data and propose a solution for the efficient long-term storage and replication of MAP graphs. We
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