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Figure 14. Performance Time Settings To edit an existing time window, follow these steps:

  • 1.

    Select a target row in the lower table of the Time Windows dialog box.

  • 2.

    Click Edit The Optimizer - Select a period dialog box appears, with the existing values displayed.

  • 3.

    Edit the values you need to change.

  • 4.

    Click OK. The revised time window values are now displayed in the lower table list of the Time

Windows dialog box.

Pace and aggressiveness of optimization

The pace and aggressiveness of optimization can be controlled using two parameters:

  • Maximum number of swaps per day

  • Maximum number of simultaneous swaps

The maximum number of swaps per day is a way to limit swap activity on the array. This might be used when Optimizer is in Automatic mode and the user would like to be more conservative with how quickly Optimizer can make changes in the environment. At the upper limit, swaps are naturally limited by the amount of time swaps take to complete. For example, if only one swap pair occurs at a time, and the average time per swap pair is 2 hours, then there will be no more than 24 moves (12 swap pairs) on average during a day. On the other hand, the user can limit the number of swaps to four pairs per day, for example (by setting the maximum number of swaps per day to 8). This allows the user to monitor the impact of the

EMC Symmetrix Optimizer A Detailed Review


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