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C102

A Distributed Rate-Adapting Buffer Cache for Mass Storage Systems

Charles G Waldman1, Patrick Fuhrmann2, Martin Gasthuber2
  1. FNAL
  2. DESY

Presented by: Patrick Fuhrmann

  To address mass storage needs common to both DESY and FNAL, a rate-adapting buffer cache is under development. The aim is to maximize utilization of limited mass storage resources by the use of prefetching (read-ahead) and caching of files based on access statistics, as well as decoupling network transfer rate from tape I/O rate. A modular architecture allows cache capacity to be dynamically reconfigured by adding or removing "cache pools", as well as allowing the system to work with several different mass storage systems. PNFS is used to provide the underlying namespace and to store cache-related metadata.

Short Paper:  Adobe Acrobat pdf 



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