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This paper presents a scalable and adaptive decentralized metadata lookup scheme for ultralarge-scale file systems (more than Petabytes or even Exabytes). Our scheme logically organizes metadata servers (MDSs) into a multilayered query hierarchy and exploits grouped Bloom filters to efficiently route metadata requests to desired MDSs through the hierarchy. This metadata lookup scheme can be executed...
Storage management server, compatible with decoupled data and meta data fashion, is being employed frantically to build large-scale distributed storage system for performance and capacity. To design this hot commodity on flexibly managing the extracted data with little meta data but extended attributes has become a big challenge. This paper breaks a new way to object orient store and implement the...
Object-based storage system (OBSS) has tens of thousands of users and stores a large number of sensitive data. its security has received a great deal of attentions Before accessing the storage devices, the clients have to acquire an authorization from the metadata servers. Existing credential-based authentication (CBA) model, which has been widely used for large high-performance storage systems, has...
This paper presents a scalable and adaptive decentralized metadata lookup scheme for ultra large-scale file systems (ges Petabytes or even Exabytes). Our scheme logically organizes metadata servers (MDS) into a multi-layered query hierarchy and exploits grouped bloom filters to efficiently route metadata requests to desired MDS through the hierarchy. This metadata lookup scheme can be executed at...
Generally storage devices only administrate the mapping of logical data space to local physical space while unknowing other information related to data objects. Network or metadata service failure will disable the system, although the data is still on devices intact and correct. Utilizing the redundant computing ability of storage devices, the object interface makes it possible to assist the MDS for...
This paper presents the implementation and performance evaluation of a real, secure object-based storage system compliant to the T10 OSD standard. In contrast to previous work, our system implements the entire three security methods of the OSD security protocol defined in the standard, namely CAPKEY, CMDRSP and ALLDATA, and an Oakley-based authentication protocol by which the Metadata Server (MDS)...
Subtree partitioning and hashing are two common techniques used for current distributed metadata management schemes. Subtree partitioning schemes do not evenly distribute workload among metadata server cluster, and a number of metadata need to be migrated to achieve coarse load balancing. Though current hashing schemes evenly distribute workload among metadata server cluster, they eliminate the storage...
Metadata management is an important component in the object-based storage network. Traditional methods can not support the memberships query with multiple attributes and dynamic update function due to complex operations. A Bloom filter is a kind of succinct way to represent a set of objects because it is a simple space-efficient randomized data structure. In this paper, we propose a new architecture...
The ever growing storage demands of modern applications cultivate a promising area of storage system management, centered upon metadata servers. Some of the works are done at the file system level, which care little about device level data organization. In this paper we present the design of managing metadata at block-level by using storage virtualization techniques. We propose both static and dynamic...
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