US Robotics 7931 Guia do Utilizador descarregar pdf (Página 147)

Chapter 4 Releasing 123

By default, the age of a file is the more recent of the file’s three ages.

In some cases, a simple age derived from the most recently accessed time, modified

time, and residence-changed time is preferred. In other cases, you might want the

access age of a file to take precedence over the modification age. You can use

directives to specify that a weighted age priority be used when calculating the

release priority for a file.

CODE EXAMPLE 4-1 shows the formats of the age priority directive.

■ The weight_age directive specifies that a file’s default age (the smaller of the

file’s access, modification, or residence age) be given a weighting factor. For float,

specify a floating-point number from 0.0 through 1.0. By default, float = 1.0.

This directive cannot be specified in conjunction with the weight_age_access,

weight_age_modification,orweight_age_residence directives.

■ The weight_age_access, weight_age_modification, and

weight_age_residence directives specify that a file’s age be determined based

on one, two, or three of these possible ages. For float, specify a floating-point

number from 0.0 through 1.0. By default, float = 1.0.

These directives cannot be specified in conjunction with the weight_age

directive.

If the weight_age_access, weight_age_modification, and

weight_age_residence directives are all used, the age-related priority for a file

is calculated as follows:

1. File age data is gathered for each file’s possible age.

2. File age data is multiplied by the weighting factors specified in the

releaser.cmd file.

3. The products of the multiplication are added together, as shown in the following

equation.

CODE EXAMPLE 4-1 Age Priority Directive Formats

weight_age = float

weight_age_access = float

weight_age_modification = float

weight_age_residence = float

file access age * weight_age_access

+ file modification age * weight_age_modification

+ file residency age * weight_age_residence

_________________________________________________

= age_related_priority

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