Digital Repository Preservation Service
________________________LMC Plus
April 16, 2008
Meg Bellinger, AUL
Roy Lechich, Audrey Novak, ILTS
Yale Cyber Infrastructure Architecture
Common Services
Persistent identification, Authentication & Authorization, Registries, Rights Management
Content Provision: Services & Storage
For digital collections, preservation, metadata
From library, museums, research, academic and administrative departments
Users
Yale and global
Fusion:
Services, Tools, Applications
Brokers, aggregators, indexes, catalogs, MetaLib, XSearch
Infrastructure Framework and Protocols
Web services, Z39.50, OAI-PMH, RSS, SRU/SRW, OAIS, Fedora
Presentation: Interfaces
Yale uPortal, Classesv2, Google, Personal Information Environment, Discipline specific, gallery, museum and library sites
Based on a graphic created by Lorcan Dempsey
PreservationArchive
E-Publishing(InstitutionalRepository)
CollectionsEnvironment
Integration Services
Content Sources
Dissem-ination
Full TextBooks
Audio& Video
Images and Metadata
ComplexObjects
Research Data
FindingAids
PersonalCollections
Google, MSN, Yahoo …
Image Commons
UniversityPortal
Library, MetaLib
CollectionsXSearch
VITAL
Classes*v2(Sakai)
.
Inte
rfac
e o
ut
Yale University Library
Digital Repository Service
Content
Metadata
Outline ______________________________________
16 Apr 2008
• Introduction• Background• Digital Preservation Repository
– Phase I– Additional Phases
• Within the Larger Landscape
16 Apr 2008
“ Digital preservation is the whole of the activities and processes involved in the physical and intellectual protection and technical stabilization of digital resources through time in order to reproduce authentic copies of these resources.” (YUL Digital Preservation Policy)
Intro: What is Digital Preservation?__________________________________________________
16 Apr 2008
Introduction: The Need___________________________________________________________________
At an ever accelerating pace, faculty, students, and staff (e.g., the Library) are creating, sharing, and storing digital information for teaching, learning, research, administrative, and creative purposes.
Mass Digitization
Information in digital form is now integral to Yale's core mission.
Statistical Datasets
Images
Scientific & Biomedical Data
Audio, Video, Podcasts
Web Sites
16 Apr 2008
Introduction: The Need__________________________________________________
• Digital resources are fragile and the preservation of these resources is complex.
• Digital preservation is dynamic – Responses to technological obsolescence or media decay
must be taken quickly.
• Digital preservation is pro-active – Rather than reactionary and the prospects for successfully
preserving digital resources rest heavily upon decisions taken at each stage of their life cycle starting with creation.
16 Apr 2008
Digital Landscapes Committee, Cyberinfrastructure Survey (Oct 2006)
Ranking from 19 survey questions posed to faculty:
#1 Easier electronic access to scholarly materials
#2 Providing students with digital access to research and instructional materials
#11 Ensuring the preservation of my scholarly digital
output (e.g., datasets, research notes, e-prints)
Introduction: The Need_____________________________________________________
16 Apr 2008
Introduction: The Need_____________________________________________________
“The coolest thing that will be done with your data someone else will do.” Open Repositories 08
Background – YUL Related Initiatives_____________________________________________________
16 Apr 2008
• IAC Rescue Repository – 2004 - present
• IAC Digital Preservation Committee – Nov 2004 - Jan 2007
• IAC Metadata Committee – Nov 2004 - Feb 2007– PREMIS - Preservation Metadata Task Force
• April - Oct 2006
16 Apr 2008
“An increasing number of projects in the YUL are generating or acquiring digital content …”
“The digital masters for much of this material are in immediate danger of permanent loss through media decay, physical damage, technological obsolescence, or difficulties in archival management..."
"...in the interim, we propose a flexible and agile/quick short-term solution…"
Rescue Repository (May 2004 Requirements Report)
______________________________________
16 Apr 2008
• Managed, secure storage (disk-to-disk-to-tape).
• Resources are organized according to owning library, collection, subcollection(s), file name.
• Activity is managed by simple ingest and retrieval applications with basic file verification and validation.
• A ~3 year temporary solution (May 2005 +3 yrs).
• Heavily used …
Resue Repository Description _____________________________________________________
RR Storage Usage
0
10
20
30
40
50
60
Date
Sto
rag
e in
TB
Total Storage
Used Storage
Available Storage
Total Storage 13.6 13.6 13.6 13.6 13.6 13.6 28.8 36 36
Used Storage 0.419 0.698 5.7 8.4 9.3 9.9 14.1 19 36 43.5 53
Available Storage 13.1 13 8 5.3 4.5 3.8 14.7 21 0
Oct-05 Jan-06 Jul-06 Jan-07 Mar-07 Jun-07 Oct-07 Nov-07 Jun-08 Sep-08 Dec-08
16 Apr 2008
Users: BRBL, Div, E-Collections, Geo, LWL, MSS/A, Peabody, Preservation, SSL, VRC, YUAG
16 Apr 2008
• Preservation Policy – Defines digital preservation; establishes general principles about what is preserved; promulgates our commitment to standards.
• Best Practices – A dynamic suite of documents that address current best practices for preservation-related issues such as format validation, registries, etc.
Digital Preservation Committee ___________________________________________________________________
16 Apr 2008
Metadata Committee ____________________________________________
Preservation Metadata Taskforce (PREMIS) Report
• PREMIS (PREservation Metadata Implementation Strategies) defines the metadata needed to preserve digital information assets for the long term.
16 Apr 2008
Two Profiles for YUL’s PREMIS Implementation:
• Base (6 elements) - A sub-set of full PREMIS … that is temporary until the library has developed digital preservation policies.
• Full - A draft that needs to be fine-tuned through experience with actual instances of use at Yale. Experience using PREMIS will determine which elements in the PREMIS model are necessary at Yale.
Preservation Metadata TaskForce Recommendations
__________________________________________________
Digital Preservation Need and Related Initiatives Summary
_____________________________________________________
• The demand for a Digital Preservation Repository from faculty, Rescue Repository users, digitization operations and projects is heavy.
• The Rescue Repository and work by the IAC Digital Preservation and Metadata/PREMIS Committees laid the foundation.
• Rescue Repository is reaching its planned end to life.
16 Apr 2008
Digital Preservation Repository: Phase I _________________________________________________________
16 Apr 2008
• $500,000 funding to establish a Digital Preservation Repository prototype.
– Provide mechanisms and services for preservation and access to the data.
– Create the scalable hardware infrastructure. – Demonstrate an extensible repository service
model.– Develop the resource (staff and economic) models.– Establish the collaborative campus partnerships. – Further the research and scholarship into digital
preservation issues.
Digital Preservation Repository: Phase I _________________________________________________________
16 Apr 2008
Working from two Use Cases:1. YPED (Yale Protein Expression Database)*
• Protein profiling mass spectrometry data sets generated by the Keck Lab
2. Images from the Rescue Repository• Approximately 400,000 individual image files
from the Art Gallery, Beinecke, Divinity Library, Lewis Walpole Library, Library Visual Resources Collection, and Manuscripts and Archives department.
* Proteomics is the large-scale study of proteins and is often considered the next step in the study of biological systems, after genomics.
Digital Preservation Repository: Phase I _________________________________________________________
16 Apr 2008
1. Hardware Architecture
2. Software Design
3. Preservation Metadata
4. Use Case: YPED
5. Use Case: Images
Phase I - Hardware ______________________________________
16 Apr 2008
• 20TB YPED and Images • 30TB Microsoft mass digitization• 10TB non-images (Rescue Repository)• 40TB Annual growth with Library digitization
projects_________
• 250TB Annual growth with Fortunoff video digitization project
• 1000TBs (a petabyte) within 5 years
Phase I - Hardware ______________________________________
16 Apr 2008
Projected Growth in Storage
0
100
200
300
400
500
600
700
800
900
2005 2006 2007 2008 2009 2010 2011 2012
TB
Software Design___________________________________________________
16 Apr 2008
Phase I - Core Preservation Functionality • Deposit, Normalization, Packaging, Validation, Ingest, Storage (multiple copies, geographic separation), Preservation Policy Management, Authorization, OAI-PMH, SRW/SRU, Retrieval• YPED and Image Use Case Requirements
Additional Phases - Additional Services • Preservation actions• All (or almost all) user-facing services• Enhanced access & delivery through applications
Repository
SIP AIP DIP
Deposit / Ingest Preservation / Storage Access
FlexibleAccept Different Types of DataCollect Data and Metadata ComponentsNormalize for Ingest ProcessingVerify IntegrityAdd IdentifiersAdd Preservation Metadata
Continuous Integrity ChecksFormat Migrations (e.g. .tiff to .jp2000)Storage Migrations (to new or different type physical media)LoggingReporting
AuthorizationValidationOAI-PMHSRW/SRUIndexingRetrievalLogging
Build:• Hardware environment• Core preservation repository services • Project specific service components
needed for YPED and to replace Rescue Repository
• Migration of Rescue Repository image content
16 Apr 2008
Digital Preservation Repository – Phase ISummary
_____________________________________________________
16 Apr 2008
Additional Phases _____________________________________________________
Examples:• Full Rescue Repository migration• More content (project/use cases)
– Project specific ingest and access
• More storage (950TBs)• Preservation actions (integrity checks, format
migrations, etc.)• Reporting• Rights Management
5 years, 6FTE, ~7 million dollars
Peer Institutions:• Stanford, Harvard• Rutgers• DAITSS (Florida)• Michigan• ColumbiaInternationally:• European National Libraries• Australia & New Zealand
16 Apr 2008
Larger Landscape ____________________________________________
Thank you
Q&A
16 Apr 2008
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