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Configure and Customize Dell PowerFlex v3.6.x

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SVM manual memory allocation

Manual memory allocation for SVMs is required in a number of scenarios. However, when using the plug-in for a clean deployment, SVM memory allocation is performed automatically.

About this task

The formula for calculating SVM memory requirements can be found in the Getting to Know PowerFlex Guide.

In the following cases, SVM memory allocation must be performed manually:

  • Manual deployment on VMware.
  • Extending an existing SVM with a new PowerFlex role/component, whether this is being done with the plug-in or manually.

    Workaround: Perform all the parts of step 1 and step 2 before extending the additional role/component on the SVM. Perform the steps on one SVM at a time.

  • Changing the SDS performance profile, post deployment.

    Workaround: Perform all the parts of step 1, one SVM at a time.

Steps

  1. For SVMs that are SDS-only, perform the following:
    1. Move the SDS to maintenance mode (MM).
    2. Shut down the SVM.
    3. Increase SVM memory, according to the formula below.
    4. Power up the SVM.
    5. Exit MM.
  2. For SVMs that are MDM (primary, secondary, or TB, may contain SDS, also):
    1. Start with secondary MDM and TBs:
      1. Move the SDS to maintenance mode.
      2. Shut down the SVM.
      3. Increase SVM memory, according to the formula below.
      4. Power up the SVM.
      5. Exit maintenance mode.
    2. Proceed with the primary MDM:
      1. Switch ownership, so the primary MDM is now a secondary MDM.
      2. Move the SDS to maintenance mode.
      3. Shut down the SVM.
      4. Increase SVM memory to the recommended size.
      5. Power up the SVM.
      6. Exit maintenance mode.

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