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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 Informix® database servers.
Administrator's GuideThe Informix® Administrator's Guide provides the information required to administer HCL Informix®.
High availability and scalabilityA successful production environment requires database systems that are always available, with minimal if any planned outages, and that can be scaled quickly and easily as business requirements change.
Connection management through the Connection ManagerConnection Managers can control automatic failover for high-availability clusters, monitor client connections and direct requests to appropriate database servers, act as proxy servers and handle client/server communication, and prioritize connections between application servers and the primary server of a high-availability cluster. Connection Managers support high-availability clusters, replicate sets, server sets, and grids.
Configuring connection managementTo configure connection management, you must install software, set environments and connectivity information, create Connection Manager configuration files, and run the oncmsm utility.
Creating Connection Manager configuration files
Parameters and format of the Connection Manager configuration fileThe following example shows the format of the Connection Manager configuration file, and shows which parameters and attributes can be set for each connection-unit type.
CM_TIMEOUT Connection Manager configuration parameterThe CM_TIMEOUT parameter specifies the number of seconds that a cluster of database servers waits to receive events from the failover-arbitrator Connection Manager. If the specified period elapses with no events received by the cluster, the primary server promotes the Connection Manager with the highest priority to the role of failover arbitrator.

CM_TIMEOUT Connection Manager configuration parameter

The CM_TIMEOUT parameter specifies the number of seconds that a cluster of database servers waits to receive events from the failover-arbitrator Connection Manager. If the specified period elapses with no events received by the cluster, the primary server promotes the Connection Manager with the highest priority to the role of failover arbitrator.

Syntax

Usage

The CM_TIMEOUT parameter is optional, and applies to CLUSTER connection units.

If the CM_TIMEOUT parameter is not specified, the timeout is 60 seconds.

Example

In the following example, if 100 seconds elapse without the servers of a high-availability cluster receiving any events from the current failover arbiter, the primary server of the cluster promotes an active Connection Manager to the role of failover arbiter:

CM_TIMEOUT 100

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