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  • September 11, 2013

WebLogic Server and PDB Switching with Oracle Database 12.1

Monica Riccelli
Product Manager

Oracle WebLogic Server 12c (12.1.2)
has integrated to support the Oracle
Database 12c features, particularly Application Continuity, Transaction Guard,
Database Resident Connection Pool, Multi Tenant Databases, and Global Data
Services. WLS integration to these new
12c database features is described in
this white paper WebLogic 12c integration to Oracle Database 12c.


The integration to Multi Tenant Database
or Pluggable Database increases elasticity, scalability, and enables multitenancy. Pluggable Database implementations allow
multiple distinct databases in a single, larger database installation. The
Container Database (CDB) feature in Oracle Database 12c minimizes the overhead
of these multi-database configurations by consolidating them into a single
database with multiple Pluggable Databases (PDB) in a single Container Database. For more information about using this feature
in WLS, see https://blogs.oracle.com/WebLogicServer/entry/part_3_12c_database_and

You should be aware of some limitations of PDB
switching with Oracle Database 12.1. The
following WebLogic Server limitations exist when using tenant switching.

  • FAN
    is not supported. Even though FAN is not
    supported, Active GridLink still provides the benefit of a single datasource
    view of multiple RAC instances and the ability to reserve connections on new
    instances as they are available without reconfiguration using connection load
    balancing. If you want to use tenant
    switching with an Active GridLink data source, “FAN enabled” must be set to
    false see http://docs.oracle.com/middleware/1212/wls/JDBCA/gridlink_datasources.htm#CHDIAGEF
    . Generic data sources don’t use FAN so
    this restriction doesn’t apply.

  • DRCP
    is not supported

  • Application
    continuity is not supported.

  • Proxy
    authentication is not supported.

  •  XA transactions in one datasource configuration with PDB switching is not

For more details about these limitations read the
documentation http://docs.oracle.com/middleware/1212/wls/JDBCA/ds_oracledriver.htm#JDBCA655.

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