US Robotics 7931 Betriebsanweisung PDF herunterladen (Seite 58)

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

The archiver starts automatically when a Sun StorageTek SAM file system is

mounted. You can customize the archiver’s operations for your site by inserting

archiving directives into the following file:

/etc/opt/SUNWsamfs/archiver.cmd

The archiver.cmd file does not need to be present for archiving to occur. In the

absence of this file, the archiver uses the following defaults:

■ All files are archived to available volumes.

■ The archive age for all files is 4 minutes. The archive age is the amount of time

since a file’s last modification.

■ The archive interval is 10 minutes. The archive interval is the amount of time that

elapses between complete archiving processes.

The following sections describe the concept of an archive set and explain the

operations performed during the archiving process.

Archiver Daemons

The sam-archiverd daemon schedules the archiving activity. The sam-arfind

process assigns files to be archived to archive sets. The sam-arcopy process copies

the files to be archived to the selected volumes.

The sam-archiverd daemon is started by sam-fsd when Sun StorageTek SAM

activity begins. The sam-archiver daemon executes the archiver(1M) command

to read the archiver.cmd file and builds the tables necessary to control archiving.

It starts a sam-arfind process for each mounted file system; if a file system is

unmounted, it stops the associated sam-arfind process. The sam-archiverd

process then monitors sam-arfind and processes signals from an operator or other

processes.

Archive Sets

An archive set identifies a group of files to be archived. Archive sets can be defined

across any group of file systems. Files in an archive set share common criteria that

pertain to the size, ownership, group, or directory location. The archive set controls

the destination of the archive copy, how long the copy is kept archived, and how

long the software waits before archiving the data. All files in an archive set are

copied to the volumes associated with that archive set. A file in the file system can

be a member of only one archive set.

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US Robotics 7931 Betriebsanweisung Seite 58