Configuring and Tuning Archival Storage Systems

Archival storage systems must operate under stringent requirements, providing 100% availability while guaranteeing that data will not be lost. In this paper we explore the multiple interconnected subsystems that must be tuned to simultaneously provide high data transfer rates, high transaction rates, and guaranteed meta-data backup. We examine how resources must be allocated to the subsystems to keep the archive operational, while simultaneously allocating resources to support the user I/O demands. Based on practical experience gained running one of the largest High Performance Storage Systems, we propose tuning guidelines that should be considered by any group that is seeking to improve the performance of an archival storage system.