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Inst & Meas WG Meeting at GEC9 Thur, Nov 4, 9am – 10:30am

Inst & Meas WG Meeting at GEC9 Thur, Nov 4, 9am – 10:30am. Introductions (9am) Topic 2: Meas Data Archive (MDA) service (9:05am) Harry Mussman (GPO) and Larry Lannom (CNRI) Topic 5: Interfaces and APIs to manage I&M services (9:30am)

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Inst & Meas WG Meeting at GEC9 Thur, Nov 4, 9am – 10:30am

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  1. Inst & Meas WG Meeting at GEC9Thur, Nov 4, 9am – 10:30am • Introductions (9am) • Topic 2: Meas Data Archive (MDA) service (9:05am) • Harry Mussman (GPO) and Larry Lannom (CNRI) • Topic 5: Interfaces and APIs to manage I&M services (9:30am) • From Scalable Sensing Service, Sonia Fahmy (Purdue) • From OMF/OML, Jolyon White (NICTA) • Topic 6: Techniques for measurement data flows (9:50am) • OML, Jolyon White (NICTA) • IPFIX, Tanja Zseby (Fraunhofer Institute FOKUS, Berlin) • NetCDF, Mike Zink (UMass Amherst) • Next steps in defining I&M Arch (10:20am) • Approach in Europe, Tanja Zseby (Fraunhofer Institute FOKUS, Berlin) • Open Discussion • Adjourn (10:30am)

  2. GENI I&M Architecture:Services and Interfaces

  3. Meas Data Archive (MDA) Srvc • Identified in GENI Inst & Meas Architecture as a core service. • Several tools/projects have referenced such a service, but none have implemented one. • Definition/conceptual design effort started after I&M workshop in June, 2010, by: • Evan Zhang (now UMass Lowell) • Harry Mussman (GPO) • Larry Lannom, Giridhar Manepalli, Jim French and Christophe Blanchi (CNRI) • v1.0 of definition/conceptual design now complete and ready for review by WG • Prototype of MDA service: • Will be built by CNRI during Spiral 3 • Who will use it by end of Spiral 3? • Next steps: • Limited discussion today. Comments? Questions? • Additional reviews? when? how?

  4. Meas Data Archive (MDA) SrvcInitial View

  5. Meas Data Archive (MDA) Srvc Current View (v1.0)

  6. Meas Data Archive (MDA) Srvc Overview (1.0) • The MDA srvc allows users to store, retrieve, browse, search, share and archive measurement data files, including their associated metadata. • The MDA srvc is not limited to measurement data, and can be used for other types of files needed by a researcher. • The MDA srvc utilizes the mechanisms provided by the CF to authenticate and authorize users. • Assume: CF drops public keys of authorized users into MDA srvc; presence of key indicates an “account” on the MDA srvc. • The MDA srvc is implemented by a User Workspace (UW) Srvc, which in turn utilizes an Digital Object Archive (DOA) Srvc.

  7. User Workspace (UW) Srvc (v1.0)

  8. User Workspace (UW) Srvc Overview (v1.0) • The UW srvc utilizes a Linux server and file system structure so that the user can easily transfer files to (and from) a familiar Linux home directory structure • Home directory structure has been setup by and for the user. • The UW srvc is expected to accumulate a large number (e.g., thousands) of files for a user, which from time to time can be discarded. • For example, It might accumulate directories of multiple files for each of 29 runs of a particular experiment. Eventually, run 29 is certified as the “golden run”, and all others can be discarded. • A UW srvc is expected to be shared by a natural group(s), so that users in the group can easily share files. • Such a group might be a campus, project or slice.

  9. Digital Object Archive (DOA) Srvc (v1.0)

  10. Digital Object Archive (DOA) Srvc Overview (v1.0) • The DOA srvc is used to archive files as objects, for long-term reference, and gives each object a persistent identifier. • The DOA srvc trusts one or more UW srvc’s, and accepts files from them. • The DOA srvc holds objects for a long time, with high availability, and makes them available to their owners and to other users, as authorized. • For example, the owner may reference an object in a research paper. • For example, the owner may make a measurement data set object available to other researchers to guide their research.

  11. Meas Data Archive (MDA) Srvc Conceptual Design (v1.0)

  12. Meas Data Archive (MDA) Srvc File Transfer Interface • User can transfer meas data (and other types of) files between Exp Cntrl Srvc or Meas Srvc (or a component) and User Workspace (UW) Srvc, which contains a Linux home directory structure, setup by user • Supported protocols include: scp; ftp(s); grid (third-party) ftp; http(s). • When transferring a file, authentication and authorization are done using keys “dropped” by the CF into the involved services

  13. Meas Data Archive (MDA) Srvc Home Directory Structure • Each user has a Home Directory structure in UW Srvc. • User can set directory or file permissions for self, other users and identified groups

  14. Meas Data Archive (MDA) Srvc Measurement Data and Metadata Files • All files have .ext to indicate nature and format of file • Each Measurement Data file will always have a Metadata file, with an identical filename and a different extension • User can generate metadata file where data is collected, and transfer it in parallel to the UW srvc; otherwise, metadata file will be generated in the UW srvc

  15. Meas Data Archive (MDA) Srvc Browse Files, Search and Edit Metadata • User can browse files via ssh or web interfaces • Use can search metadata via web interface. • User can edit metadata, e.g., add annotation, via web interface

  16. Meas Data Archive (MDA) Srvc Transfer Files to Digital Object Archive Srvc • User can select file(s) (including metadata) for transfer to Digital Object Archive (DOA) Srvc, get necessary persistent object identifier, transfer file as an object, and set object access rules • User can update object in DOA service • User can retrieve object from DOA service • User can allow others to browse, search and get objects from DOA service

  17. Meas Data Archive (MDA) Srvc Authentication, Authorization and Access Control • AM authenticates and authorizes users through CF (usually based on credentials) • AM has full administrator privileges in Linux server and file system • AM creates Linux account for each user allocates resources, e.g., storage, and inserts public ssh keys • Administrator via AM assigns Users to Linux Groups • File System implements extended access control for directories or individual files based on Linux group structure

  18. Meas Data Archive (MDA) Srvc • Identified in GENI Inst & Meas Architecture as a core service. • Several tools/projects have referenced such a service, but none have implemented one. • Definition/conceptual design effort started after I&M workshop in June, 2010, by: • Evan Zhang (now UMass Lowell) • Harry Mussman (GPO) • Larry Lannom, Giridhar Manepalli, Jim French and Christophe Blanchi (CNRI) • v1.0 of definition/conceptual design now complete and ready for review by WG • Prototype of MDA service: • Will be built by CNRI during Spiral 3 • Who will use it by end of Spiral 3? • Next steps: • Limited discussion today. Comments? Questions? • Additional reviews? when? how?

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