Uda Wiki Web

  • Topic
  • Discussion
    • UdaWikiWeb.Udavirtuosovdbms(Last) -- Owiki? , 2016-08-19 15:01:29 Edit
    [TXT]
    [PLAIN]
    [DOCBOOK]
    owiki 2016-08-19 15:01:29

    virtuoso.vdbms





    Virtual Database





    Virtual Database
    Replication strikes a balance between presenting consistent data and not depending on a single centralized location for all IS needs.

    Virtuoso offers a range of tools and technologies for replicating and synchronizing data between different servers. These technologies are suited for a wide variety of distributed IS needs, including:

    • Two-way replication of tables, involving a Virtuoso hub sharing data between a group of MS SQL Server, Oracle or DB2 databases. The Virtuoso will initiate data transfer and resolve possible update conflicts.
    • Disseminating periodically changing data between heterogeneous relational databases. Almost any ODBC/JDBC accessible database can be a source or recipient of such data.
    • Keeping Virtuoso DAV repositories in sync between Virtuoso installations.
    • Keeping Virtuoso servers in real-time sync for load balancing or hot standby situations. This is based on real-time log shipping, thus will also work for intermittently connected systems.
    • Sharing mobile data through SyncML . The Virtuoso SyncML server has pluggable logic for format conversions between common mobile formats such as Vcard and Vcalendar.
      All these technologies function reliably in either a constantly or intermittently connected network. Nodes will bring themselves up-to-date automatically upon reconnect or recovery, requiring minimal administration.

    A web based interface or SQL statements are used for defining publications and subscriptions and synchronization intervals.

    SyncML 1.0