Storage Policy Copy - Best Practices
If the source copy is on disk and managed by a Windows MediaAgent, enable the Use Unbuffered I/O option for each mount path. Use of unbuffered I/O can significantly improve performance. For more information, see Administering Mount Paths.
If you modify the selective copy criteria (Hourly, Monthly etc.,) for automatically selecting full backups in the Selective Copy tab of the Copy Properties dialog box, then the auxiliary copy operation will pick the jobs based on the new selective copy criteria (only if there are no jobs selected to be copied based on the old copy criteria).
For example, if you change the selective copy criteria from weekly to monthly and if there are jobs picked up based on weekly criteria, then the monthly criteria will take effect only from next month. If there are no jobs picked up based on weekly criteria, then the monthly criteria will take effect immediately and when Auxiliary Copy operation is performed it will pick the jobs based on the monthly criteria.
We recommend to use disk media for a primary copy and tape media for an inline copy for a storage policy. However, ensure that the same MediaAgent is used for both the copies.
If you have Dynamic Stream Allocation feature enabled on the Storage Policy, then make sure to use same streams configuration on both source and the destination copy which has parallel copy enabled. This allows you to improve the performance of parallel copy operations.
If you have enabled the spool copy option for a primary copy, it is recommended to use a disk library for primary copy and a tape library for the synchronous copy. Thus, the disk library serves as the temporary holding area and its limited resources can be freed on a daily basis.