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Data Breakout. OGSA Architecture – databases. Eldas, OGSA-DAI and GridMiner implement a slightly old version of OGSA / DAIS Architecture doc describes capabilities; DAIS explores details Current OGSA / DAIS spec does not include: Extensibility (e.g. as used in e-Diamond)

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ogsa architecture databases
OGSA Architecture – databases
  • Eldas, OGSA-DAI and GridMiner implement a slightly old version of OGSA / DAIS
    • Architecture doc describes capabilities; DAIS explores details
  • Current OGSA / DAIS spec does not include:
    • Extensibility (e.g. as used in e-Diamond)
    • Packing of multiple tasks and multiple data sets
    • Translation
  • Definitely need (* as noted in OGSA doc):
    • Data connection / third-party delivery*
    • Unique names for identifying data content and data instance*
    • Robust and integrated architecture*
    • Model of metadata for databases
  • Eldas and OGSA-DAI have OGSI, WSRF and WS-I interfaces planned
    • OGSA explicitly assumes WSRF
    • Some resistance to this; a federated approach suggested
ogsa architecture files
OGSA Architecture – Files
  • File Storage – GSM (SRM-like)
  • Directory structure – GFS
  • Replica Catalogs – OREP
  • Metadata Catalogs
    • File stats (locking, mutability, ACLs)
    • User attributes
  • API for access – ADF (POSIX-like)
  • Definitely need:
    • Naming
    • Data Movement
web service interfaces
Web Service Interfaces
  • SRM is not WS-I compliant (yet)
  • Eldas supports message-level encryption
    • https for Wed Services
    • WS-Security for Grid services
  • OGSA-DAI requires XSLT
  • Other standards that we have to adhere to
    • POSIX, Windows, NFS, FTP, Gzip, …
apis user commands
APIs: User commands
  • Files: Explorer equivalent
    • Including ls, tail, find, … ?
      • Need to prioritise
    • Quota management
    • ACLs
  • Files: Directories
    • Familiar interface
  • Databases: Query tool
    • OGSA-DAI and Eldas provide GUI tools
    • Quick query, schema inspection, etc
    • No existing standard
  • Databases: DBA Tools
    • No existing standard
apis programming interfaces
APIs: programming interfaces
  • Files: SRM
    • POSIX-like
      • Need to prioritise
    • plus management interface to handle scalable systems
  • Files: Directories
    • Familiar interface
  • Files: Catalogs
    • One-shot interface (because content unknown)
    • Bulk operations
  • Databases:
    • “OGSA-DAI client API”
      • E.g. simple query
      • Add to SAGA or form DAIS API group?
    • Extensibility interface (client and server)
    • Bulk operation and bulk data interface (client and server)
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