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Virtual Filesystem Directory Service. Leo Luan, Ted Anderson IBM Almaden Research Center 10/7/2003 at GGF9. Virtual Filesystem Directory Service. Enables the realization of a Grid File System with a uniform, global, hierarchical namespace

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Virtual filesystem directory service

Virtual Filesystem Directory Service

Leo Luan, Ted Anderson

IBM Almaden Research Center

10/7/2003 at GGF9


Virtual filesystem directory service1
Virtual Filesystem Directory Service

  • Enables the realization of a Grid File System with a uniform, global, hierarchical namespace

  • Hierarchically organizes file data sources (network file systems accessible through standard protocols such as NFS, CIFS) as well as any abstract data services supporting file access

  • VFDS can render itself as a data service

  • Permits distributed namespace ownership within and across organizations without compromising autonomy


A Global Namespace using Virtual Filesystem Directory Service

and Replica Location Service

/grid

Global root

VFDS junctions

ggf.org

ibm.com

SG

ARC

shark

(gsiftp://shark.tucson.ibm.com)

csstorage(LFSN: arc_cs_storage)

ais

fileX(LFN: 8493802)

RLS

dst

RLS

wiki

grid

File system arc_cs_storage:

gsiftp://csstorage.almaden.ibm.com

nfs://nas1.almaden.ibm.com/csstor

file 8493802:

gsiftp://gridftp1.almaden.ibm.com/aisfiles/8493802

gsiftp://gridftp2.tucson.ibm.com/almfiles/ais/8493802


Grid File System Data Service, NFS, CIFS Service

(GFS gateway, caching appliance, etc)

Application Host

Application

POSIX, Win32 API

GFS, CIFS, NFS clients

File System Clients

VFDS

RLS

GridFTP

Server

Abstract data services

Physical data sources

CIFS

Server

Local

File System

NFS

Server

Other types of native data


Virtual filesystem directory service summaries
Virtual Filesystem Directory Service - Summaries Service

  • Enables a virtualized, hierarchical namespace that federates file systems, individual files as well as other abstract data services supporting file access semantics

  • An informational document was published at GGF8 to facilitate discussions and standardization

  • A reference implementation is being done at IBM Almaden

  • Engaging NFSv4 workgroup for possible NFS realization

  • Data service abstraction of VFDS is being considered


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