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Chapter 4 Releasing 129

TABLE 4-3 shows archive set assignment values that pertain to releasing.

For more information about these and the other archiver.cmd directives, see

“Archiving” on page 33.

Planning Releaser Operations

It is necessary to decide the characteristics of files in cache for your site. It is

wasteful to load a tape if you are staging only a few kilobytes, so you may want to

configure your system to retain small files in cache.

CODE EXAMPLE 4-5 shows the

directives to use in the releaser.cmd file to release the largest files first.

Alternatively, you might want to retain recently modified files in cache, since a

recently modified file might be modified again soon. This avoids the overhead

involved when the file is staged to enable modification. In this case, use the second

set of age weights (the age since last modified).

CODE EXAMPLE 4-6 shows the

directives to use in the releaser.cmd file to weight files from the oldest modified

to the most recently modified.

TABLE 4-3 Archive Set Assignment Values for Releasing

Directive Effect

-release a Specifies that the files in the archive set should be released after the

first archive copy is made. Do not use this option if you are making

more than one archive copy of each file. In such a situation, copy 1

would be staged in order to make copy 2.

-release d Reset to default.

-release n Specifies that the files in the archive set should never be released.

-release p Specifies that the files in the archive set should be partially released

after archiving.

CODE EXAMPLE 4-5 Directives to Release the Largest Files First

weight_size = 1.0

weight_age = 0.0

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 287 288

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