Title

A Novel Weighted-Graph-Based Grouping Algorithm For Metadata Prefetching

Keywords

Algorithm; Metadata; Prefetch; Storage

Abstract

Although data prefetching algorithms have been extensively studied for years, there is no counterpart research done for metadata access performance. Existing data prefetching algorithms, either lack of emphasis on group prefetching, or bearing a high level of computational complexity, do not work well with metadata prefetching cases. Therefore, an efficient, accurate, and distributed metadata-oriented prefetching scheme is critical to leverage the overall performance in large distributed storage systems. In this paper, we present a novel weighted-graph-based prefetching technique, built on both direct and indirect successor relationship, to reap performance benefit from prefetching specifically for clustered metadata servers, an arrangement envisioned necessary for petabyte-scale distributed storage systems. Extensive trace-driven simulations show that by adopting our new metadata prefetching algorithm, the miss rate for metadata accesses on the client site can be effectively reduced, while the average response time of metadata operations can be dramatically cut by up to 67 percent, compared with legacy LRU caching algorithm and existing state-of-the-art prefetching algorithms. © 2006 IEEE.

Publication Date

1-4-2010

Publication Title

IEEE Transactions on Computers

Volume

59

Issue

1

Number of Pages

1-15

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TC.2009.115

Socpus ID

72949092915 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/72949092915

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