Pathway/XM System Management Manual

Configuring the Pathway/XM Environment
Compaq NonStop™ Pathway/XM System Management Manual—426761-001
4-17
Specifying the Default Volume and Subvolume
will run, on the average, only one-fourth as many processes (for this NODE object) as
run in CPUs 3 and 5.
More than one NODE object can specify the same set of CPUs. In this case, the
processes assigned to both NODE objects will run in those CPUs.
Assigning a weight of 0 to a CPU, specifies that the CPU is available to be used only
after another CPU has failed. For example, the following SET statement specifies three
processors:
SET NODE CPUS (1:100, 3:0, 5:0)
For this NODE object, 100 percent of the workload will be assigned to CPU 1. If CPU 1
fails, the workload is equally divided between CPUs 3 and 5.
For the NODE object defined in the following statement, if CPU 1 fails, its 50 percent
work load is divided equally between CPUs 2, 3, and 5:
SET NODE CPUS (1:50, 2:25, 3:25, 5:0)
The following statement prevents processes from running with a backup because there is
no CPU in which the processes can run:
SET NODE CPUS (1:100, 2:0)
Specifying the Default Volume and Subvolume
The DEFAULT attribute specifies the default volume and subvolume names to be
applied to Guardian disk-file name attributes of all requester-related or server-related
objects to which this NODE object applies. Any volume or subvolume name configured
for a particular object attribute overrides the DEFAULT volume or subvolume name.
If you specify this attribute, you must specify both a volume name and a subvolume
name, as in the following example:
SET NODE DEFAULT $DATA.PXM
If this attribute is not defined, PXMCFG uses its current default volume and subvolume
names. It is recommended that you use this attribute to specify the default volume and
subvolume explicitly.
Specifying Process Priority
The PRI attribute of the NODE object defines the base execution priority for
Pathway/XM processes assigned to this NODE object relative to processes associated
with other NODE objects. The value of this attribute must be an integer from 11
through 199.
If the PRI attribute is specified for a NODE object (and is not overridden by a priority
specification for the TCP or SERVER object), each process started on this logical node