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Tivoli Space Manager for UNIX Using the Hierarchical Storage Management Clients


Starting Automatic Reconciliation

The HSM client automatically reconciles each file system for which space management is active. To specify how often reconciliation runs, modify the setting on the reconcileinterval option in your dsm.sys file. The default is every 24 hours. To specify how many file systems automatically are reconciled at one time, modify the setting on the maxreconcileproc option in your dsm.sys file. The default is three file systems.

When you modify or delete a migrated or premigrated file from your local file system, an obsolete copy of the file remains in storage. During automatic reconciliation, any obsolete copies of your migrated or premigrated files are marked for expiration. When the copies expire, they are removed from the server. To specify how many days a migrated or premigrated file remains in storage after you recall and modify or erase it from your local file system, modify the setting on the migfileexpiration option in your dsm.sys file. The default is seven days.

For more information about these options, see "Using Options".

Table 14 describes the tasks that automatic reconciliation performs on files and file systems.

Table 14. Reconciliation Tasks

Object Reconciliation Tasks
Migrated files
  • Verifies that a stub file exists on your local file system for each migrated file in storage.
  • Marks a migrated file for expiration if:
    • You deleted the stub file from your local file system
    • You recalled the file and modified it.
  • Removes a migrated file from storage if it expired.
  • Updates the status file.

Premigrated files
  • Verifies that premigrated files are still valid.
  • Marks a premigrated file for expiration if:
    • You deleted the file from your local file system
    • You accessed the file and modified it.
  • Removes a copy of a premigrated file from storage if it expired.

Stub files Records, in the orphan.stubs file, the name of any file for which a stub file exists on your local file system, but a migrated file does not exist in storage. See "Resolving Orphaned Stub Files" for more information.
Premigrated files database Valid for AIX JFS only

  • Deletes invalid entries from the premigrated files database.
  • Completes reorganization of the premigrated files database that is stored in the .SpaceMan directory if processing is interrupted.
  • Clears the database if the premigrated files database is corrupted. All previously premigrated files become resident files.
Status file Updates the following information in the status file:
  • Number of premigrated files
  • Number of premigrated blocks
  • Number of migrated files
  • Number of migrated blocks.
Note:
Migration and recall processes update status information dynamically. If any other process changes the state of a file, the status file does not reflect the change until reconciliation is run.


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