OptorSim: a Simulation Tool for Scheduling and Replica Optimisation in Data Grids
Authors: David Cameron, Ruben Carvajal-Schiaffino, Paul Millar, Caitriana Nicholson, Kurt Stockinger, Floriano Zini.
Abstract:
In large-scale Grids, the replication of files to different sites is an
important data management mechanism which can reduce access latencies and
give improved usage of resources such as network bandwidth, storage and
computing power. In the search for an optimal data replication strategy,
the Grid simulator OptorSim was developed as part of the European DataGrid
project. Simulations of various HEP Grid scenarios have been undertaken
using different job scheduling and file replication algorithms, with the
experimental emphasis being on physics analysis use-cases. Previously, the
CMS Data Challenge 2002 testbed and UK GridPP testbed were among those
simulated; recently, our focus has been on the LCG testbed. A novel
economy-based strategy has been investigated as well as more traditional
methods, with the economic models showing distinct advantages in terms of
improved resource usage.
Here, an overview of OptorSim's design and implementation is presented with a selection of recent results, showing its usefulness as a Grid simulator both in its current features and in the ease of extensibility to new scheduling and replication algorithms.
Last modified Thu 29 April 2004 . View page history
Switch to HTTPS . Website Help . Print View . Built with GridSite 1.4.3