The swap wizard provides an option to define, verify, and schedule user-defined swaps. This feature allows the user to manually create and schedule swaps and provides a vehicle to:
Undo specific swaps.
Quickly swap highly active devices to newly attached disks.
Edit an Optimizer suggested list of swaps.
Note the following for user-defined swaps:
A swap can be performed with a properly configured, but inactive device. There is no requirement that both logical devices be currently processing I/O.
The Optimizer is used as a verifier and as a swap engine. It is the user’s responsibility to define swaps that do not have a negative impact on the overall performance of the Symmetrix back end. The Optimizer uses the same swap legality checks when verifying user-defined swaps as it does in other swap modes.
Users can either create the list of swaps from scratch or use the Optimizer suggested swap list as the base line.
Creating a list of swaps from scratch To start a list from scratch, follow these steps:
Select the first hyper and click Add.
Select a second hyper from the list displayed in Hyper 2, and click Add to add the pair to the swap list.
Figure 7 illustrates this feature.
EMC Symmetrix Optimizer A Detailed Review