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Table of Contents

Executive summary ............................................................................................5

Introduction ......................................................................................................... 5 Audience ...................................................................................................................................... 5

What is Symmetrix Optimizer? ..........................................................................5 Demo mode.................................................................................................................................. 6 Supported environments.............................................................................................................. 6 Configuration requirements.......................................................................................................... 7 Dynamic Reallocation Volumes (DRV technology)...................................................................... 7

Interaction with TimeFinder...................................................................................................... 7 Requirement for open mirror position....................................................................................... 7 Requirement for open configuration lock ................................................................................. 7

How does Symmetrix Optimizer work?.............................................................8 Analysis........................................................................................................................................ 8

Performance metrics ................................................................................................................ 8 Modeling service time............................................................................................................... 9 Finding the best swap .............................................................................................................. 9 Swap procedure......................................................................................................................... 10

Mirrored device swap steps.................................................................................................... 10 RAID 5 swap steps................................................................................................................. 11 RAID 6 swap steps................................................................................................................. 12 Legality of swaps.................................................................................................................... 12 Impact of the swap procedure................................................................................................ 14

Symmetrix Optimizer features and best practices.........................................14 Virtual LUN (LUN migration) ...................................................................................................... 14 Swap modes .............................................................................................................................. 16

Automatic/User Approved ...................................................................................................... 16 User-defined swaps................................................................................................................ 17 Rollback.................................................................................................................................. 18 Tips......................................................................................................................................... 18 Setting Rollback from SMC .................................................................................................... 19 Analysis reports ......................................................................................................................... 19

Workload and Initial Analysis Period ......................................................................................... 21

Tips......................................................................................................................................... 22 Setting Workload Analysis Period and Initial Period from SMC............................................. 22 Device Attributes........................................................................................................................ 23

Tip........................................................................................................................................... 23 Setting Device Attributes from SMC....................................................................................... 23 Swap and Performance Time Windows..................................................................................... 24

Tips......................................................................................................................................... 24 Setting Swap and Performance Time Windows from SMC ................................................... 24 Pace and aggressiveness of optimization ................................................................................. 26

Tip........................................................................................................................................... 27 Setting pace and aggressiveness of optimization from SMC................................................. 27 Logs ........................................................................................................................................... 27

Tips......................................................................................................................................... 27 Setting logs from SMC ........................................................................................................... 27 Rule-based analysis................................................................................................................... 28

EMC Symmetrix Optimizer A Detailed Review

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