Hades: Locality-aware Proxy Caching for Distributed File Systems

In the present paper we explore storage manage-ment issues in proxy servers for distributed file sys-tems. We organize the requested data at the disks of the proxy server using locality-aware approaches. Ad-ditionally, we introduce improvements in the map-ping mechanism from remote to local data and con-sider cost-aware replacement methods. In a prototype implementation that we developed, we experimentally compare alternative distributed file systems as com-ponents of the proxy servers. Through extensive mea-surements, we demonstrate throughput improvements at the proxy server up to 80 % in comparison to the disk-based cache of a commonly used distributed file system. 1