US Robotics 7931 Guia do Utilizador descarregar pdf (Página 141)

Chapter 4 Releasing 117

■ Candidate – A candidate is a file that is eligible to be released. A file is not a

candidate under the following circumstances:

■ The file is already offline.

■ The file has not been archived.

■ The archiver.cmd command file specifies the -norelease attribute for the

file, and the required copies have not yet been made.

■ The file is marked as damaged.

■ The file is not a regular file. It is a directory, block, character-special file, or

pipe.

■ The archiver is staging the file to make an additional copy. The file becomes

eligible for release after the archiver stages it.

■ The age of the file is negative. This can occur for network file system (NFS)

clients with inaccurate clock settings.

■ The file is marked to never be released. You can use the release(1) –n

command to specify this.

■ The file was staged at a time in the past that is less than the minimum

residence time setting. For more information, see “The min_residence_age

Directive: Specifying a Minimum Residence Time” on page 126.

■ The file was flagged for partial release, through the release(1) command’s –p

option, and it is already partially released.

■ The file is too small. Releasing it will not create very much space.

■ Priority – A priority is a numeric value that indicates the rank of a candidate file

based on user-supplied weights that are applied to numeric attributes of that

candidate. The overall priority is the sum of two types of priority: age priority

and size priority.

Candidate files with numerically larger priorities are released before candidates

with numerically smaller priorities.

■ Weight – The weight is a numeric value that biases the priority calculation to

include file attributes in which you are interested and to exclude file attributes in

which you are not interested. For example, the size attribute of a file is excluded

from the priority calculation if the size weight is set to 0. Weights are floating-

point values from 0.0 to 1.0.

■ Partial release – With partial release, a beginning portion of the file remains in

disk cache while the rest of the file is released. Partial release is useful with

utilities such as filemgr(1) that read the beginning of a file.

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US Robotics 7931 Guia do Utilizador Página 141