Disadvantages

The major disadvantage of migrating trusted storage without data preservation is the possibility of temporary license overage. That is, more served clients might exist than is allowed for given licenses due to clients holding licenses during the migration period. Once migration is complete and records no longer exist in trusted storage for these served clients, the LLS can serve the licenses to new clients, possibly serving beyond the available license count. However, once the license-borrowing period expires for the existing served clients, the overage is corrected.

Because of the possibility of overages, migration without data preservation is suitable when the borrow period is short enough so that the cost of license leakage due to temporary overages is justified. However, this type of migration is unsuitable when the borrow period is long or licenses are permanent.