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September 30, 2011
DataOne Workshop - Morning
Technical considerations to make entry smoother
Resource dedication on UMBS behalf
Policies and practices
Advantages for researchers and UMBS
DataONE - overview - Amber Budden
- Remove inefficiencies related to data handling for researchers
Three components
Member Nodes, Coordinating Nodes, Investigator ToolKit
1) Cyberinfrastructure
- Member nodes that implement DataONE's software stack
- Coordinating nodes - catalog/indexer of member node content
- Investigator toolkit - end-user tools to work with data
Data wouldn't be submitted until after first use so efficiency gain is minimal for data originator
Tools planned for all stages of the data life cycle
Feedback mechanisms
- Scientist survey published in PLoS one
Progress to date
- Draft of architecture document
- Past prototype stage
- UCSB, U New Mexico, Oak Ridge - Coordinating Nodes
- Member Nodes - Dryad, KNB, Oak Ridge (aim to double over years)
- Investigator Toolkit - morpho
DataOne Users Group - stakeholder inclusion (meetings co-located with esip)
Infrastructure Overview - Dave Vieglais
Data Model
- 3 granules of management
1) Data object (e.g., file)
2) Metadata
3) Resource Map - OAI initiative expressed in RDF, (binds 1 and 2)
System metadata attached to each, from Member Node (e.g., file size, access rules)
- used for system checks
Data Package - objects 1-3 together, possibly hierarchical arrangement of data packages
System Metadata (some properties set by MNs (member nodes))
Identifier - -- MNs need to provide unique identifiers for each granule
fmtid - file description
size - file size
submitter - institution
Once data and metadta are submitted they cannot be changed, can be deprecated (but retained)
System metadata (Access rules) are alterable
Functionality
Identifying Objects - fairly unrestricted, assigned by MNs
Identifying People - client side certificates for authentication
- CILogon - select own identity provider (e.g., home institution, google)
- Access defined by MNs (i.e., who can access which content)
- Data objects replicated among MNs, directed by CNs
- MN replication action is varied, resource requirements will vary
Content Discovery
- Through CNs
Coordinating Nodes
- Object tracking/replication mgmt
- Java J2EE web services on Tomcat
- Metacat and Mercury, Hazlecast
Member Node Implementation
Process options
1. Implement APIs in implementation (e.g., in metaCat)
2. Deploy gateway service
3. Deploy independent member node (synchronize with own repository)
Member Node Tiers
1. Read only, public content
2. Read only, access control
3. Read/Write use APIs
4. Operate as a replication target
Authentication and Authorization
3 identity types
Inidividual Subject
Group Subject
Special Subject - Public use, authenticated user, verified user
Users register with dataOne, CILogon identity registered on first use
CN - expose API for identity jobs
CILogon -> gives authentication certificate for access to data objects
InCommon, Protect Network, OpenID
SSL used for communication
Client -> Authenticate CILogon -> CILogon communicates to CN -> certificate to client -> Client request to MN (with certificate) -> MN fulfills request
Authentication requires release of real name and email
Access policies set by contributors
Details about pieces - Operation docs
Source code repository
Posted by kkwaiser at September 30, 2011 11:32 AM
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