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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.
MIRROR configuration parameterUse the MIRROR configuration parameter to enable or disable mirroring for the database server.

MIRROR configuration parameter

Use the MIRROR configuration parameter to enable or disable mirroring for the database server.

onconfig.std value: MIRROR 0
values: 0 = Disable mirroring
1 = Enable mirroring
takes effect: After you edit your onconfig file and restart the database server.

Usage

It is recommended that you mirror the root dbspaces and the critical data as part of initialization. Otherwise, leave mirroring disabled. If you later decide to add mirroring, you can edit your configuration file to change the parameter value.

You do not have to set the MIRROR configuration parameter to the same value on both database servers in the high-availability data-replication pair. You can enable or disable mirroring on either the primary or the secondary database server independently. Do not set the MIRROR configuration parameter to 1 unless you are using mirroring.

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