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NCAR RDA Globus integration
The NCAR RDA – Globus Integration:
Experiences developing a modern research data
portal
Globus World
May 2019
Riley Conroy
National Center for Atmospheric Research (NCAR)
Boulder, CO
CISL/DECS

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NCAR RDA Globus integration
About the RDA
rda.ucar.edu
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• History
– Established 1960s
• Purpose
– Support climate & weather research at NCAR and
UCAR universities with reference datasets
• Collections
– Ocean & atmospheric observations, climate
reanalyses, operational NWP products
– 600+ datasets, 10M files, 2.2 PB
– Continually growing: 70+ updated daily-monthly
• Free and open access
• Science educated staff

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NCAR RDA Globus integration
RDA as a Data Provider
• Provide curated datasets
– Search and Discovery
– Robust metadata archives
• Data Manipulation
– Subset capabilities
– Format conversion
• Enable reproducible research
– Structured policies for use of DOIs
– User history of data access maintained to
facilitate dynamic citation generation
• Support NCAR PIs with data management needs
– Large, complex datasets
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NCAR RDA Globus integration
Good Old Days
• Apache directory listing
• FTP
• cURL/wget
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NCAR RDA Globus integration
Unique Users by Country
(Past Year)
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NCAR RDA Globus integration
RDA Data usage
• FY 2018
14K+ unique web users
2.85 PB data delivered
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NCAR RDA Globus integration
Challenges
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NCAR RDA Globus integration
Challenges
• Authentication
–Complicated scripts
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NCAR RDA Globus integration
Challenges
• Authentication
–Complicated scripts
• Single web server
–Limit number of concurrent downloads
–Server can become overwhelmed with high use
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Start of semester
(dramatized)

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NCAR RDA Globus integration
Challenges
• Authentication
–Complicated scripts
• Single web server
–Limit number of concurrent downloads
–Server can become overwhelmed with high use
• User sophistication
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NCAR RDA Globus integration
Challenges
• Authentication
–Complicated scripts
• Single web server
–Limit number of concurrent downloads
–Server can become overwhelmed with high use
• User sophistication
• Existing data portal
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NCAR RDA Globus integration
Existing Infrastructure
• Existing Globus GridFTP
infrastructure in place at NCAR
–Science DMZ
• 4 servers
–100 Gb Ethernet connections
–50 GB/s (400 Gb/s) site bandwidth
–25 GB/s (200 Gb/s) offsite
bandwidth
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NCAR RDA Globus integration
Initial Integration
• Determining what was needed
• Endpoint management
• PHP + Perl scripts
• CLI to create and manage shares
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NCAR RDA Globus integration
Further Developments
• Shared endpoints
–Two permanent shared endpoints
•Requests (deleted after 5 days)
•Semi-permanent shares
• Users added to endpoint ACL
–1000 ACLs per endpoint
• Database integration
–Shares
–Manage ACLs
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NCAR RDA Globus integration
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Oauth 2.0 Delegated
transfers
• Curated file lists
• Automated transfer of
custom delayed mode
products

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NCAR RDA Globus integration
• Delegated OAuth 2.0 transfers
–RDA submits transfers on behalf of users
–Curated file lists
–Automated transfers for delayed mode requests
• Authentication with RDA identity
–https://github.com/NCAR/rda-globus-myproxy-oauth
• Repository
–https://github.com/NCAR/rda-globus
• Future
–HTTP downloads
–S3 Connector
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Recent and Planned Enhancements
4.5
years in operation
4,800
unique users
8,890
data shares
34,400,000
files transferred
1.25
petabytes moved
39
countries
(through March 2019)
RDA-Globus by the
numbers

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NCAR RDA Globus integration 17
Testimonial

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Questions
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