Archival - Disk and Tape Storage Cost Models Richard Moore...

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SAN DIEGO SUPERCOMPUTER CENTER at the UNIVERSITY OF CALIFORNIA, SAN DIEGO Disk and Tape Storage Cost Models Richard Moore & David Minor San Diego Supercomputer Center (SDSC) University of California San Diego Presented by: Heba Saadeldeen
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SAN DIEGO SUPERCOMPUTER CENTER at the UNIVERSITY OF CALIFORNIA, SAN DIEGO Realistic cost estimates and projections are critical for storage users/providers While much info is available on vendor hardware solutions … Little info on integrated costs from storage provider perspective Estimate costs for at-scale provider to ‘store bits’ Outline Caveats SDSC’s Storage Infrastructure ‘Bit Storage’ Cost Estimates Tape Archival Storage Disk Storage Projections – with scale of storage facility and into the future Conclusions
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SAN DIEGO SUPERCOMPUTER CENTER at the UNIVERSITY OF CALIFORNIA, SAN DIEGO Caveats on Cost Estimates Sustainable storage Based on SDSC experience only Include UCSD’s indirect costs – will vary by institution Other providers may have different cost structure Based on SATA disk and enterprise-class tape systems Cannot be specific about vendor costs or burdening, but relative fractions are reasonable This is a snapshot as of Jan 2007 - will decline w/ time Paper focuses only on single-copy ‘bit storage’ costs ‘Bit storage’ is only a fraction of the cost to ‘preserve data’
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SAN DIEGO SUPERCOMPUTER CENTER at the UNIVERSITY OF CALIFORNIA, SAN DIEGO A Three-Stage Model for A Digital Preservation Environment Store Ingest Use ‘Bit Storage’ Capacity Online (disk) Archival (tape) Single-copy reliability Media/technology advances Data migration Replication Geographically distributed System diversity
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SAN DIEGO SUPERCOMPUTER CENTER at the UNIVERSITY OF CALIFORNIA, SAN DIEGO SDSC’s Storage Infrastructure
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This note was uploaded on 12/27/2011 for the course CMPSC 290h taught by Professor Chong during the Fall '09 term at UCSB.

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Archival - Disk and Tape Storage Cost Models Richard Moore...

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