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The need for interoperation and data exchange through the Internet has made Extensible Markup Language (XML) a dominant standard for data representation, while relational databases are widely used in enterprises to support critical business operations. XML querying language (XUpdate) is used to modify XML documents where as structured query language (SQL) for retrieving and manipulating data in relational...
This paper proposes a simple and practical RAID reconstruction optimization scheme, called JOurnal-guided Reconstruction (JOR). JOR exploits the fact that significant portions of data blocks in typical disk arrays are unused. JOR monitors the storage space utilization status at the block level to guide the reconstruction process so that only failed data on the used stripes is recovered to the spare...
Action grammar is a grammar with action symbols appearing in the right part of production rules, which can be used to implement semantic analyzer automatically. An action symbol represents the name of a semantic routine. Implementation of action grammar relies on specific parsing methods, such as LL(K), recursive-descent or LR, and so on. However, these parsing methods have their own restrictions...
We minimizes fingerprint management overhead (index lookup and index insert) via introducing main memory index lookup structure and workload-aware index partitioning of the index file in the storage. Backup server maintains three data structures for redundancy elimination: Header files, chunk files and fingerprint tables. These data structures altogether enables PRUNE to effectively eliminate redundancy...
Existing power-aware optimization schemes for disk-array systems tend to strike a delicate balance between energy consumption and performance while ignoring reliability. To achieve a reasonably good trade-off among these three important design objectives in this paper we introduce an energy efficient disk array architecture, called a Green RAID (or GRAID), which extends the data mirroring redundancy...
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