HP Serviceguard manual Resourceupvalue, Concurrentvgchangeoperations, Enablethreadedvgchange

resource_up_value

Defines a criterion used to determine whether the resource identified by resource_name is up.

Requires an operator and a value. Values can be string or numeric. The legal operators are =, !=, >, <, >=, or<=, depending on the type of value. If the type is string, then only = and != are valid. If the string contains white space, it must be enclosed in quotes. String values are case-sensitive.

The maximum length of the entire resource_up_value string is 1024 characters.

You can configure a total of 15 resource_up_values per package. For example, if there is only one resource (resource_name) in the package, then a maximum of 15 resource_up_values can be defined. If two resource_names are defined and one of them has 10 resource_up_values, then the other resource_name can have only 5 resource_up_values.

concurrent_vgchange_operations

Specifies the number of concurrent volume group activations or deactivations allowed during package startup or shutdown.

Legal value is any number greater than zero. The default is 1.

If a package activates a large number of volume groups, you can improve the package’s start-up and shutdown performance by carefully tuning this parameter. Tune performance by increasing the number a little at a time and monitoring the effect on performance at each step; stop increasing it, or reset it to a lower level, as soon as performance starts to level off or decline. Factors you need to take into account include the number of CPUs, the amount of available memory, the HP-UX kernel settings for nfile and nproc, and the number and characteristics of other packages that will be running on the node.

NOTE: If you set concurrent_vgchange_operations to a value greater than 1, you may see messages such as this in the package log file:

Cannot lock “/etc/lvmconf//lvm_lock” still trying...”

This is an informational message that can be safely ignored.

enable_threaded_vgchange

Indicates whether multi-threaded activation of volume groups (vgchange -T)is enabled. New for modular packages. Available on HP-UX 11i v3 only.

Legal values are zero (disabled) or 1 (enabled). The default is zero.

Set enable_threaded_vgchange to 1 to enable vgchange -Tfor all of a package’s volume groups. This means that when each volume group is activated, physical volumes (disks or LUNs) are attached to the volume group in parallel, and mirror copies of logical volumes are synchronized in parallel, rather than serially. That can improve a package’s startup performance if its volume groups contain a large number of physical volumes.

Note that, in the context of a Serviceguard package, this affects the way physical volumes are activated within a volume group; concurrent_vgchange_operations (page 247) controls how many volume groups the package can activate simultaneously.

Choosing Package Modules 247