Sep 2 – 9, 2007
Victoria, Canada
Europe/Zurich timezone
Please book accomodation as soon as possible.

Storage Technology Evaluations at BNL

Sep 5, 2007, 8:00 AM
10h 10m
Victoria, Canada

Victoria, Canada

Board: 31
poster Distributed data analysis and information management Poster 2


Robert Petkus (Brookhaven National Laboratory)


The RHIC/USATLAS Computing Facility at BNL has evaluated high-performance, low-cost storage solutions in order to complement a substantial distributed file system deployment of dCache (>400 TB) and xrootd (>130 TB). Currently, these file systems are spread across disk-heavy computational nodes providing over 1.3 PB of aggregate local storage. While this model has proven sufficient to date, the projected demand for disk storage over the next five years is expected to cap 30 petabytes. At this scale, more cluster nodes may be needed to meet storage requirements than necessary for computation alone, introducing potential architectural inefficiencies. Candidate solutions include extending the existing paradigm (more and larger disks per compute node), augmentation with a cache of file servers, or consolidation of distributed storage onto dedicated file servers. The product of our evaluation process will strive to address these concerns and provide a clear path for the future. To this end, a spectrum of storage solutions was subjected to both synthetic and production benchmarking in an effort to discern the maximum I/O capacity of each system. The goal was to identify the highest achieving and most versatile storage systems, compare and contrast technology (e.g., RAID implementation, SATA vs. SAS disks, Solaris/ZFS vs. Linux/ext3), and consider cost, ease of management and scalability. Since data center real estate and power concerns are paramount, additional consideration was given to ultra high-density storage systems. Test methodology, results, and analysis are provided.
Submitted on behalf of Collaboration (ex, BaBar, ATLAS) RHIC/USATLAS

Primary author

Robert Petkus (Brookhaven National Laboratory)


Jason Smith (Brookhaven National Laboratory) Ofer Rind (Brookhaven National Laboratory)

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