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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's ReferenceThe HCL OneDB™ Administrator's Reference includes comprehensive descriptions of HCL OneDB™ configuration parameters, the system-monitoring interface (SMI) tables in the sysmaster database, the syntax of database server utilities such as onmode and onstat, logical-log records, disk structures, event alarms, and unnumbered error messages.
Configuring and monitoring HCL OneDB™
Database configuration parametersThe HCL OneDB™ database server uses a configuration file, which is called the onconfig file, during initialization. This file contains default configuration parameter values. You can modify the parameter values to improve performance and other characteristics of the instance or database.
DRAUTO configuration parameterSet the DRAUTO configuration parameter to specify a HDR-failover method for HDR high-availability systems.

DRAUTO configuration parameter

Set the DRAUTO configuration parameter to specify a HDR-failover method for HDR high-availability systems.

onconfig.std value

DRAUTO 0

Range of values


Value	Description
0	Automatic failover is disabled. When the primary server fails or loses network connectivity, the HDR secondary server becomes read-only.
1	Automatic failover is enabled. When the primary server fails or loses network connectivity, convert the HDR secondary server to a standard server. The HDR secondary server gracefully ends client connections and shuts down, and then restarts as a standard server. When the failed primary server restarts or reconnects to the network, convert the standard server back to the HDR secondary server. Do not use this setting if you configured Connection Managers to perform failover.
2	Automatic failover is enabled. When the primary server fails or loses network connectivity, convert the HDR secondary server to a primary server. The HDR secondary server maintains client connections and does not shut down. When the failed primary server restarts or reconnects to the network, convert it to an HDR secondary server. Do not use this setting if you configured Connection Managers to perform failover.
3	Failover is controlled by Connection Managers. Connection Managers must be configured and active for automatic failover.

Takes effect

When shared memory is initialized.

Usage

All servers of a high-availability cluster must have the same DRAUTO configuration parameter setting.

The DRAUTO configuration parameter does not control failover for SDS secondary servers or RS secondary servers. To set automatic failover for a high-availability cluster that has SD secondary servers or RS secondary servers, configure Connection Managers.

Important: If you are using Connection Managers to control failover, the DRAUTO configuration parameter must be set to 3 on all cluster servers. You must not perform a manual failover while Connection Managers are active.

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