Optimal File-Bundle Caching Algorithms for Data-Grids

  • Authors:
  • Ekow Otoo;Doron Rotem;Alexandru Romosan

  • Affiliations:
  • Lawrence Berkeley National Laboratory;Lawrence Berkeley National Laboratory;Lawrence Berkeley National Laboratory

  • Venue:
  • Proceedings of the 2004 ACM/IEEE conference on Supercomputing
  • Year:
  • 2004

Quantified Score

Hi-index 0.00

Visualization

Abstract

The file-bundle caching problem arises frequently in scientific applications where jobs process several files concurrently. Consider a host system in a data-grid that maintains a disk cache for servicing jobs of file requests where a job is serviced only if all its requested files are present in the disk cache. Files must now be admitted into the cache and replaced in sets of file-bundles. We show that traditional caching algorithms based on file popularity measures do not perform well since they may hold in cache non-relevant combinations of files. We present and analyze a new caching algorithm for maximizing the throughput of jobs and minimizing data replacement costs at such data-grid hosts. We tested the new algorithm using a disk cache simulation model under a wide range of conditions of file request distributions, varying cache size, file size distribution, etc. The results show significant improvement over traditional caching algorithms.