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Learn about the collaborative effort of the NDSA to preserve a national digital collection for future generations. Explore current storage practices, access requirements, system functionalities, and challenges in digital preservation infrastructure.
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Trends & Challenges in Digital Object Storage Infrastructure: Notes from the National Digital Stewardship Alliance (NDSA) Infrastructure Working Group Storage Survey MDOR Roundtable SAA Annual Meeting Wednesday, August 8, 2012 On behalf of the NDSA: Nancy McGovern, MIT Libraries Jefferson Bailey, Library of Congress
Objective: • A collaborative effort among government agencies, educational institutions, non-profit organizations, and business entities to preserve a distributed national digital collection for the benefit of citizens now and in the future. • Membership: • 127 member organizations have joined the NDSA since it was founded in July 2010 • An initiative of the National Digital Information Infrastructure and Preservation Program (NDIIPP) open to any organization committed to the preservation of digital cultural heritage • http://www.digitalpreservation.gov/ndsa
Working Groups NDSA members commit to participating in one of the five working groups of the Alliance Standards & Practices Content Infrastructure Innovation Outreach Infrastructure Working Group: Working to identify and share emerging practices around the development and maintenance of tools and systems for curation and preservation.
NDSA Infrastructure Storage Survey • Goal: • Obtain a snapshot of current digital object storage practices within NDSA membership • Details: • Conducted between August and November 2011 • 58 responses from the (then) 74 NDSA members actively preserving digital content • Results: • Published in parts via the NDIIPP blog, The Signal http://blogs.loc.gov/digitalpreservation/ • Full report forthcoming
Scope • The Storage Survey examined activities around 4 topics associated with digital preservation infrastructure: • Access – How do access requirements impact digital preservation infrastructure? • Distribution – How are institutions using cloud and distributed storage systems for preservation? • Fixity – How are institutions ensuring file fixity? • Administration – How are institutions currently ensuring and strategically planning for digital preservation storage infrastructure.
Access: Modes of Access Percentage of NDSA Orgs Supporting Each Access Mode
Access: Requirements & Systems SYSTEMS: 65% (37 of 58) reported providing separate systems for storage and access 35% (20 of 58) reported using the same system for storage and access REQUIREMENTS: 53% (31 of 58) reported having a single access requirement (e.g. on-line availability) for all the collections they are preserving. 33% (19 of 58) reported supporting two degrees of access requirements among their collections 14% (8 of 58) reported supporting three or more degrees of access among their collections.
Distribution: Geographic & System Preferences • Priorities for storage system functionality: • More built-in functions like fixity checking • More automated inventory and retrieval • More storage space • Higher performance processing (tasks such as indexing)
Challenges • Access: • Supporting multiple modes of access can require customization of the preservation stack • Access modes largely “conditional” thus requiring tailored workflows • Distribution: • Cloud-storage emerging, but feature-poor • Greater automated features desired in future storage systems • Fixity: • Validation can be processing & I/O intensive • Multiple storage media types can complicate checking • Best practices for frequency of checking are unclear • Administration: • Cost of file and media redundancy • Results showed a bottom-up approach to storage, as opposed to the TRAC top-down approach, though over 60% planned on eventual TRAC compliance • Systems migrations still difficult, expensive
More information about the Alliance is at www.digitalpreservation.gov/ndsa/ Standards & Practices Content Infrastructure Innovation Outreach Read about NDSA work on The Signal blogs.loc.gov/digitalpreservation/ Nancy McGovern, MIT Libraries Jefferson Bailey, Library of Congress THANKS!