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Data


Area Director: David E Martin

The Data Area groups explore the access, management and transport of data on grids.
 
 
OGSA ByteIO Working Group (BYTEIO-WG)
Group Information
Group Type: Working Group
Group Chair(s): Mark Morgan, Neil Chue Hong
 
Group Description
The objective of the OGSA ByteIO working group is to define a minimal Web Service interface for providing "POSIX-like" file functionality. Essentially this allows any service which implements the interface to be accessed in a file-like way. The WG will produce a use case informational document, a recommendation document and an experience document.
 
Group Links
 
 
Database Access and Integration Services WG (DAIS-WG)
Group Information
Group Type: Working Group
Group Chair(s): Oscar Corcho, isao kojima
Group Secretary(s): Steven Lynden
 
Group Description
Research and development activities relating to the grid have generally focused on applications where data is stored in files. However, in many scientific and commercial domains, database management systems have a central role in data storage, access, organisation, authorisation, etc, for numerous applications. The group is developing standards for grid data services, focusing principally on providing consistent access to existing, autonomously managed databases from web services. By focusing on services, the intention is to ease application development through the provision of composable components. The group does not seek to develop new data storage systems, but rather to make such systems more readily usable individually or collectively within a grid framework.
 
Group Focus and Scope
The group has been working on the development of a family of data access and integration specifications. The WS-DAI specification defines data model independent properties and operations that are shared by interfaces to different kinds of data resource. These properties are then extended and the templates instantiated by realisations - data model specific data access services. To date, the group has focused on realisations for accessing relational (WS-DAIR) and XML (WS-DAIX) data resources. The specifications for WS-DAI, WS-DAIR and WS-DAIX are have all been submitted to the GGF Recommendations track.
 
Group Links
 
 
Data Format Description Language WG (DFDL-WG)
Group Information
Group Type: Working Group
 
Group Description
The aim of this working group is to define an XML-based language, the Data Format Description Language (DFDL), for describing the structure of binary and textual files and data streams so that their format, structure, and metadata can be exposed.
 
Group Links
 
 
Digital Repositories Research Group (DR-RG)
Group Information
Group Type: Research Group
 
Group Description
The goal of the Digital Repositories Research Group (DR-RG) is to analyze how digital repositories can be built on top of federated storage infrastructure, focusing on the exploitation of existing data-related standards and the identification of need for new or revised data-related standards.
 
Group Focus and Scope
The group is building on the results of three workshops organized by OGF-Europe, DReSNET and OMII-UK (at OGF23, the 4th International Digital Curation Conference, and OGF25) where interactions between the Digital Repositories and the OGF communities started. At these workshops the need for a focused analysis was established and there was general agreement to form an OGF group.

The RG may study any aspects of building digital repositories on top of federated storage infrastructures but the initial focus will be on two specific areas:

* Metadata Use-Case collection
Metadata handling is key to digital repositories and metadata interchange is the key to federated repositories. The RG will collect and analyze different use-cases in the various communities to identify common architectures and build a basis for potential future standardization efforts in metadata handling. Note that this differs from metadata definitions, which are domain-specific and beyond the scope of this group.

* Architecture Study
The architectures of typical digital repositories will be analyzed to identify communalities. Emphasis will be given to federated repositories. This will serve as basis for identifying the potential for exploitation of existing standards as well as the need for new or revised standards.

Where appropriate, the RG will use the ISO Open Archival Information System (OAIS) reference model for specifying archive systems as a basis for architecture analysis.

 
Group Links
 
 
Grid File System Working Group (GFS-WG)
Group Information
Group Type: Working Group
Group Chair(s): Arun Jagatheesan, Osamu Tatebe
Group Secretary(s): Chris Jordan
 
Group Description
GFS-WG works on standard service interface(s) and architecture of a logical file system that can be used in data grid management systems for both inter and intra enterprise grid environments. This group also collaborates with the SNIA ILM and other similar efforts in the industry.
 
Group Focus and Scope
Data Grids provide a logical view or organization of unstructured data (and any other digital entity) that can be distributed in multiple adminstrative domains that participate in a Grid. The view provided by the data grid is very similar to that of an hierarchical tree-like organization used in tradiational file systems. Grid File System (GFS) provides this logical hierachical view of data and other digital entities in a data grid. GFS Working Group works on providing standard GFS service interface and architecture that can be used in Data Grids and Data Grid Management Systems.
 
Group Links
 
 
GridFTP WG (GRIDFTP-WG)
Group Information
Group Type: Working Group
Group Secretary(s): Jay Alameda
 
Group Description
This group focuses on improvements of FTP and GridFTP v1.0 protocol with the goal to produce bulk file transfer protocol suitable for grid applications. New protocols should be backward compatible with RFC959 FTP as much as possible with new features added as (negotiable) extensions. Some desired extensions are: parallel transfers, GSI authentication, and striped transfers.
 
Group Links
 
 
Grid Storage Management WG (GSM-WG)
Group Information
Group Type: Working Group
Group Secretary(s): Alex Sim
 
Group Description
In this Working Group we will focus on the definition of the functionality of a standard SRM (Storage Resource Manager) interface. We define Storage Resource Managers (SRMs) as middleware components whose function is to provide dynamic space allocation and file management of shared storage components on the Grid. We see this as a short-term effort to have a workable interface that Grid projects could immediately make use of to resolve interoperability issues between storage systems.
 
Group Links
 
 
Info Dissemination WG (INFOD-WG)
Group Information
Group Type: Working Group
Group Chair(s): Dieter Gawlick, Steve Fisher
 
Group Description
The purpose of this group is to develop a model for Information Dissemination to support the timely delivery of valuable information, and to develop one or more specifications backed up by appropriate use cases
 
Group Links
 
 
OGSA Data Movement Interface WG (OGSA-DMI-WG)
Group Information
Group Type: Working Group
 
Group Description
The OGSA DMI Working Group tackles the problems of discovering of data transport protocols available at the data's source and destination location and agreeing on one of them, and the actual invocation of the agreed data movement. This includes direct data movements and 3rd party data movements.

The OGSA DMI Working Group, though clearly associated to its roots with the OGSA Working Group, aims to define a set of interfaces that is independent of the "umbrella use case" of Grid Applications so that it can be used in scenarios and deployments other than the Grid.
 
Group Links

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