wiki:GSAS

Version 23 (modified by hmussman@bbn.com, 7 years ago) (diff)

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GENI Storage and Archive Service (GSAS)

Participating Projects and Organizations

Project 1663: Digital Object Registry (CNRI)

Project 1856: GIMI I&M Tools (UMass Amherst, RENCI and others)

Technical Contacts

Giridhar Manepalli (CNRI) (mailto:gmanepalli@cnri.reston.va.us / 703 620 8990)

Shu Huang (RENCI) (mailto:shuang@renci.org)

GPO System Engineer: Harry Mussman

GPO Software Engineer: Jeanne Ohren

1) GENI Policy for Sharing Research Results

GENI is developing a policy for sharing research results with the community that follows evolving practice. The GSAS will provide the mechanisms necessary to implement the policy.

Task list:

ID Description Who Due Status Demos Notes
1 Establish GENI policy on sharing research results
1a DRAFT policy ( 2 pages) Larry/Giridhar 6/1/13
1b Review with GPO Larry/Giridhar 6/1/13
1c Review with community Larry/Giridhar GEC17
1d
1e

2) Goals for GENI Storage and Archive Service (GSAS)

For GSAS:

  1. A structured place to store all of the objects (artifacts) for an experiment, with descriptors (metadata), that is easy to access, with short to medium term storage, and the ability to search. (Note: this goes well beyond just measurement data objects.)
  1. A separate long-term archive, with controlled access from the outside world, using a DOI (handle) as a persistent identifier
  1. Include most of the functionality provided by the Measurement Data Archive (MDA) prototype, built by CNRI.
  1. Establish multiple federated iRODS services, starting at RENCI and UMass Amherst, and operate for GENI users (experimenters).
  1. Establish persistent accounts for each user, and use icommands to store and retrieve objects (artifacts) for each user in the storage service.
  1. Establish authentication for each user based on username/password, certificates, and also proxy (delegated) certificates.
  1. Establish a directory structure in the storage service for each user to accommodate multiple experiments, and a directory structure for each experiment (consider "bag") to include all objects (artifacts) associated with that experiment, including one or more descriptors (metadata) within XML files (following the GENI descriptor schema).
  1. Provide multiple interfaces (including icommand and web) to allow an authenticated user to view, search and curate their objects (artifacts).
  1. Provide interface to allow a user to define an object (artifact) to be archived (where the object (artifact) may range from a large directory to a single file), include a descriptor (following the GENI ObjectDescriptor Schema), assign a persistent Digital Object Identifier (DOI, or "handle"), and decide when to push it to archive service.
  1. Establish an archive service that provides long-term and reliable storage, with public access via a DOI from the global handle service.
  1. Include a search function in the archive service, so that an outside user can search for and then retrieve an object, but allow the object’s owner to disable search, so that an outside user needs the DOI of the object to retrieve it.

Goals for GENI ObjectDescriptor Schema

  1. Useful for all types of objects, not just MeasurementData objects.
  1. Keep it simple, with the minimum number of mandatory fields.
  1. Where possible, values for fields should be automatically generated by Experiment Management Tools.

Use of “DataCite Schema for the Publication and Citation of Research Data”:

  1. When an object (artifact) is archived in the Archive Service with public access from the outside world via the Internet, using a DOI (handle) as a persistent identifier, and include descriptors (metadata) that follows DataCite Schema (ref)

2) Architecture and Design of GENI Storage and Archive Service (GSAS)

An overview of the architecture and design of the GSAS is contained in this document:

GENI Storage and Archive Service: Storing and Archiving Experiment Objects

1) Goals
2) Configuration
3) Use Cases
4) Structure of Directories and Files in the GSAS
5) Access to the Structure in GSAS
6) Adding Descriptors
7) Searching Structure in GSAS
8) Creating a Bag and a .tar File
9) Archiving an Object
10) Overview of v1.x GENI ObjectDescriptor Schemas

This document is based on the early Measurement Data Archive (MDA) service prototype developed by CNRI, and many discussions within the GENI I&M community.

Versions:

042613 v1.1 GENI ObjectDescriptor Schema

042913 v1.2 GENI ObjectDescriptor Schema

Task list:

ID Description Who Due Status Demos Notes
2 "Storing and Archiving Experiment Objects" document
2a Review v1.1 Group 4/29/13 completed
2b Issue v1.2 Harry 5/1/13 completed
2c Review with GPO Harry/Jeanne ?
2d Review with GEMINI Harry/Jeanne ?
2e Review with GIMI Harry/Jeanne ?
2f
3 Resolve design issues
3a Issue 2.1: How are persistent accounts established for each user in iRODSs? Shu, Jeanne
3b Issue 2.2: How are storage capacity limits established and enforced for each IRODS user? Are older objects (artifacts) flagged for removal? Shu
3c Issue 2.3: How are archive capacity limits established and enforced for each IRODS user? Are older objects (artifacts) flagged for removal? Shu
3d Issue 5.1: Where is the proxy certificate created? How is the proxy certificate transferred to the service? Ezra
3e Issue 5.2: What happens if the proxy certificate expires? Is the user notified? How can they load an updated proxy certificate? Ezra
3f Issue 5.3: How is the target information transferred to the service? Ezra
3g Issue 5.4: How is the iticket transferred to the service? Cong
3h Issue 5.5: What happens if the iticket certificate expires? Is the user notified? How can they load an updated proxy certificate? Cong
3i Issue 5.6: How is all of this target information transferred to the service agent? Cong
3j Issue 6.1: Need to establish rules if there is a discrepancy in descriptors. Shu
3k Issue 6.2: Need to establish rules for changing or removing metadata.xml files. Shu
3l Issue 7.1: When using a browser in the Experiment Management Environment (or elsewhere) to view artifacts (files and directories) in the GSAS, how will the associated descriptors (metadata) will be displayed? Shu
3m Issue 8.1: After the bag and .tar file have been created and used, is there some cleanup that should be done? Shu
3n Issue 8.2: After changes have been made to directories and files, what is the process for recreating the bag and .tar file? Shu
3o Issue 10.1: Is there a way to derive the descriptors in an archive.xml file from descriptors in the other types of metadata.xml files, or at least an initial set of descriptors for the archive.xml file? Giridhar
3p
3q

3) GENI ObjectDescriptor Schema

Schema:

GENIObject

Examples of metadata.xml files:

Project1
Experiment1
ProjectSerialized
Step1
Artifact1

ArchiveofProject
ArchiveofExperiment
ArchiveofStep
ArchiveofArtifact

Task list:

ID Description Who Due Status Demos Notes
2 "Storing and Archiving Experiment Objects" document
2a Review v1.1 Group 4/29/13 completed
2b Issue v1.2 Harry 5/1/13 completed
2c Review with GPO Harry/Jeanne ?
2d Review with GEMINI Harry/Jeanne ?
2e Review with GIMI Harry/Jeanne ?
2f

4) DataCite Schema

When GENI research results are shared with the research community, they will use the DataCite metadata schema, which has been established for the research community.

References:

document
metadata example

5) iRODS Design

Design:

iRODS fact sheet
iRODS overview
iRODS configuration
iRODS use cases

Plan:

011513 iRODS plan
041513 iRODS plan

Open issues:

Next steps:

6) iRODS Deployment

Design:

Versions:

Open issues:

Next steps:

7) Access to GSAS from UserWorkspace

Design:

Versions:

Open issues:

Next steps:

8) Access to GSAS from GEMINI I&M Tools

Design:

Versions:

Open issues:

Next steps:

9) Access to GSAS from GIMI I&M Tools

Design:

Versions:

Open issues:

Next steps:

10) Acceptance Tests

11) Tutorials and Experimenter Support

8) Key task list:

ID Description Who Due Status Demos Notes
1
1
1
1
1
1

A) Technical References

iRODS fact sheet
iRODS overview
iRODS configuration
iRODS use cases
iRODS plan

I&M Tools: Basic Test/Tutorial/Experiment Storyboard
I&M Tools: Basic Test/Tutorial/Experiment Workflow

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