Release 10.1A: OpenEdge Deployment:
Managing 4GL Applications

> ## Connecting clients to databases

> To access a database, you must connect to the database. You can connect to one or more databases during a single Progress 4GL session. You can also start a Progress 4GL session without connecting to a database, and connect later.

> Note: On UNIX, the kernel configuration’s file descriptor limit imposes a practical limit on connected databases. “Unable to open file” or “Unable to allocate I-Node” messages often mean your system’s file descriptors have been exhausted. “Unable to allocate shared memory” often means your shared memory has been exhausted on your system. For more information about kernel configurations, see OpenEdge Getting Started: Installation and Configuration .

> When connecting to databases, consider the following factors:

> - Logical database names

> - Connection modes

> - Connection parameters

> - Connection techniques

> - Connecting to a non-OpenEdge database

> - Connection denials when the user count is exceeded

> - Reducing connection times

> - Starting clients without connecting to a database

Copyright © 2005 Progress Software Corporation www.progress.com Voice: (781) 280-4000 Fax: (781) 280-4095