Dynamic data replication in LCG 2008.
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| Title: | Dynamic data replication in LCG 2008. |
|---|---|
| Authors: | Nicholson, C., Cameron, D. G., Doyle, A. T., Millar, A. P., Stockinger, K. |
| Source: | Concurrency & Computation: Practice & Experience; Aug2008, Vol. 20 Issue 11, p1259-1271, 13p, 1 Diagram, 2 Charts, 4 Graphs |
| Subject Terms: | HADRON colliders, DATA replication, DATA warehousing, ECONOMIC models, COMPUTER architecture |
| Abstract: | To provide performance access to data from high-energy physics experiments such as the Large Hadron Collider (LHC), controlled replication of files among grid sites is required. Dynamic, automated replication in response to jobs may also be useful and has been investigated using the grid simulator OptorSim. In this paper, results are presented from simulations of the LHC Computing Grid in 2008, in a physics analysis scenario. These show, first, that dynamic replication does give improved job throughput; second, that for this complex grid system, simple replication strategies such as Least Recently Used and Least Frequently Used are as effective as more advanced economic models; third, that grid site policies that allow maximum resource sharing are more effective; and lastly, that dynamic replication is particularly effective when data access patterns include some files being accessed more often than others, such as with a Zipf-like distribution. Copyright © 2008 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR] |
| Copyright of Concurrency & Computation: Practice & Experience is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Complementary Index |
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