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Tivoli Space Manager for UNIX Using the Hierarchical Storage Management Clients


Recalling Your Migrated Files

You can recall a migrated file to your local file system from storage using either transparent recall or selective recall.

Transparent recall automatically returns a migrated file to your local file system when you access the file. If you change the recall mode for a migrated file, or for a specific execution of a command, you change how the HSM client recalls a migrated file.

Note:
The following transparent recall modes, available in read access, are for AIX JFS file systems only.

Migrate-on-close
Temporarily recalls a migrated file to its originating file system. The recalled file remains on your local file system only for as long as it is open. When you close the unmodified file, a stub file replaces it on your local file system. The file is migrated again. It is not necessary to send a copy of the file to storage because you did not modify the file. The copy that currently resides in storage remains valid.

Normal
Recalls a migrated file to its originating file system. The recalled file remains on your local file system. When you close the unmodified file, the copy that currently resides in storage remains valid. The local copy is premigrated.

Read-without-recall
Reads a migrated file from storage without storing it on your local file system. The HSM client reads information sequentially from the migrated file, and caches information that it reads from the file into a memory buffer on your workstation. The read-without-recall mode is intended for single-access, sequential reads of non-executable files.

Selective recall returns specific, migrated files to your local file system. You select the files that you want to recall. You, as root user, can selectively recall any migrated file from your workstation. When you selectively recall a file, you store it in its originating file system. Selective recall overrides the recall mode that you set for a migrated file.


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