Novell FILE SYSTEM FACTORY 1.2.1 - ADMINISTRATION Manual page 84

available, leaving little for another work that might need to go occur. To combat this
problem, each File System Factory™ policy has a configurable throttle attribute that is
used during data migration to limit bandwidth usage.
While the throttle attribute is very useful, there may be times of the day on certain days of
the week when the administrator does not want data to migrate. In the policy definition,
the administrator has the capability of selecting the times that are valid for moving data.
This configuration is granular to the hour and is represented for each day of the week.
Therefore, the administrator could define a policy where data migrations only occur on
the weekend and Tuesday and Thursday between 1 am and 5 am.
"Seamless" Data Movement
Moving data on the network is a non-trivial operation. It must be conducted in such a
manner to ensure that the user that owns the data and the integrity of the data itself is not
impacted.
Simply copying the data to the new location and deleting the data in the old location is not
good enough. What if files are open during the move process or the user is logged in or
logs in during the process? What if others share access to the storage? How is the user
cognizant of the fact that a migration of his files is in progress?
File System Factory™ contains safeguards to ensure "seamless" migration of the data by
taking the necessary precautions to avoid these and other situations and educate the user
about the migration process.
For example, File System Factory™ will defer migration of data for a user that is logged
in to the server holding the home directory until the user is no longer logged in. Once
migration begins the user's Home Directory attribute will be temporarily changed to point
to a PROXY location that contains information about the move process.
Novell File System Factory™ Administrator's Guide 83
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