Description
Specifies whether you want PowerBuilder to recognize and participate in failover to a designated backup database server if the current database server goes down.
When to specify SvrFailover
You must specify the SvrFailover parameter before connecting to the database.
Applies to
ASE or SYC SAP Adaptive Server Enterprise (12.0 and higher database connections only)
O90 Oracle9i
O10 Oracle 10g
ORA Oracle (for 11g and later)
Syntax
SvrFailover='value'
|
Parameter |
Description |
|---|---|
|
value |
Specifies whether you want PowerBuilder to recognize and participate in failover to a designated backup database server if the current database server goes down. Values are:
|
Default value
SvrFailover='No'
Usage
Both Oracle and SAP support database server failover in Oracle Version 8.1.5 or later and Adaptive Server 12 or later. For information about how to configure failover for these database servers, see your Oracle or Adaptive Server documentation. To avoid losing your PowerBuilder database connection (as the result of a timeout) when a failover takes place, set the SvrFailover parameter so that PowerBuilder recognizes and participates in the database server failover.
Oracle also allows you some control over the failover process. Three additional parameters allow you to specify the number of times you want the database server to which you are connected to attempt a failover, how long to wait between failover attempts, and whether PowerBuilder should display a runtime dialog box indicating when a failover occurs.
This parameter cannot be set dynamically. The value set when the connection is made remains in effect until it is disconnected.
Examples
To tell PowerBuilder to recognize and participate in failover:
-
Database profile
Select the Allow Server Failover check box on the Network page in the Database Profile Setup dialog box.
-
Application
Type the following in code:
SQLCA.DBParm="SvrFailover='Yes'"
See also
