13.3.2 Configuration Parameters for Sun Cluster HA for Lotus (Sun Cluster 2.2 Software Installation Guide)

Sun Cluster 2.2 Software Installation Guide

13.3.2 Configuration Parameters for Sun Cluster HA for Lotus

This section describes the information you supply to the hadsconfig(1M) command to create configuration files for each Sun Cluster HA for Lotus data service. The hadsconfig(1M) command uses templates to create these configuration files, and stores the files in the /etc/opt/SUNWsclts directory. The templates contain some default, some hardcoded, and some unspecified parameters. You must provide values for the parameters that are unspecified.

The fault probe parameters, in particular, can affect the performance of Sun Cluster HA for Lotus. Tuning the probe interval value too low (increasing the frequency of fault probes) might encumber system performance, and also might result in false takeovers or attempted restarts when the system is simply slow.

You must set the takeover flag for Sun Cluster HA for Lotus. This flag specifies how Sun Cluster will handle partial failover. There are two options:

-y (yes) - Sun Cluster will switch over the logical host to another master. If the attempt fails, Sun Cluster will switch over all logical hosts to the target master anyway, and also might halt or reboot the original master. This flag is the default.
-n (none) - Sun Cluster will not move the logical host to another master, even if it detects problems with the data server, nor will it take any action against the sick data server or database on the logical host.

13.3.2.1 Configuration Parameters for Sun Cluster HA for Lotus

Configure the Sun Cluster HA for Lotus parameters listed in the hadsconfig(1M) input form by supplying options described in Table 13-2.

Table 13-2 Configuration Parameters for Sun Cluster HA for Lotus


Parameter	Description
Name of the instance	Logical host name used as an identifier for the instance. The log messages generated by Sun Cluster HA for Lotus refer to this identifier. The `hadsconfig(1M)` command prefixes the package name to the logical host name you supply. For example, if you specify "hahost1," `hadsconfig(1M)`produces "SUNWsclts_hahost1."
Logical host	Name of the logical host that provides service for this instance of Sun Cluster HA for Lotus.
Base directory of product installation	Rooted path name specifying the location on the multihost disk of the HA Lotus installation. This is the "instance path," for example, `/hahost1/lotus-home/lotus_1`.
Configuration directory	The directory of the database, for example, `/hahost1/d1/Lotus/database.db`.
Remote probe	Specifies whether the Lotus fault probe will probe the remote host. Default value is `-n`.
Local probe	Specifies whether the Lotus fault probe will probe the local host. Default value is `-y`.
Probe interval	The time, in seconds, between fault probes. The default interval is 60 seconds.
Probe timeout	The time, in seconds, after which a fault probe will time out. The default timeout value is 60 seconds.
Server port number	Unique port for this instance of Sun Cluster HA for Lotus. The default port number is 1352.
Takeover flag	Specifies whether a failure of this instance will cause a takeover or failover of the logical host associated with the data service instance. Possible values are `-y` (yes) or `-n` (no). Default value is `-y`..