US Robotics 7931 Podręcznik Użytkownika Pobierz pdf (Strona 102)

78 Sun StorageTek SAM Archive Configuration and Administration Guide • Version 4, Update 6, 04/07

Making Archive Copies of Offline Files: -offline_copy

A file is a candidate for being released after one archive copy is made. If the file

releases and goes offline before all the archive copies are made, the archiver uses this

parameter to determine the method to be used when making the other archive

copies. In choosing the method to be used, consider the number of drives available

to the Sun StorageTek SAM system and the amount of disk cache available.

This parameter has the following format:

For method, specify one of the keywords shown in

TABLE 3-16.

Specifying Recycling

The recycling process enables you to reclaim space on archive volumes that is taken

up by expired archive images. By default, no recycling occurs.

If you want to recycle, you can specify directives in both the archiver.cmd file and

the recycler.cmd file. For more information on the recycling directives supported

in the archiver.cmd file, see “Recycling” on page 149.

-offline_copy method

TABLE 3-16 Values for the -offline_copy Directive’s method Argument

method Value Meaning

none Stages files as needed for each file before copying to the archive volume.

Default.

direct Copies files directly from the offline volume to the archive volume without

using the cache. This method assumes that the source volume and the

destination volume are different volumes and that two drives are available.

If this method is specified, raise the value of the stage_n_window mount

option to a value that is greater than its default of 256 kilobytes. For more

information on mount options, see the mount_samfs(1M) man page.

stageahead Stages one file while archiving another. The system stages the next archive

file while writing a file to its destination.

stageall Stages all files to disk cache before archiving. This method uses only one

drive and assumes that room is available on disk cache for all files.

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US Robotics 7931 Podręcznik Użytkownika Strona 102