Create a Performance Policy

Performance policies are intended to be the optimal performance settings for the specific application. The performance policy helps optimize the performance for a volume based on the expected characteristics of the application using the volume. The performance policy defines the behavior of its associated volumes when their limit is exceeded.

You can associate a volume with an existing performance policy or create a new one.

IMPORTANT:

During replication synchronization, a custom performance policy on the upstream partner is created on the downstream partner, if needed. If a performance policy already exists that is not identical, the partners might fail to synchronize.

This applies only to snapshot replication. Synchronous replication does not use performance policies.

  1. Choose Manage → Performance Policies.
    A list of all performance policies and the number of volumes associated with them is displayed.
  2. Click the + sign to create a new performance policy.
  3. Enter a name that reflects the best use of the policy.
  4. Choose an Application Category from the drop-down list.
  5. (Optional) Choose a block size to match the application block size from the Storage Block Size drop-down list.
    Choices range from 4 KiB to 32 KiB. If in doubt, use the default of 4 KiB.
    NOTE: After the performance policy is created, the block size cannot be changed.
  6. (Optional) Deselect the check boxes to disable the compression or caching options.
    NOTE: Leave compression and caching enabled for most applications.
    • Disable compression when the application using the volume precompresses data before storing it or when compression slows write times for an application that requires above-average sequential write throughput.
    • Disable caching for applications that use a sequential access to the volumes, such as an exchange log file. Exchange log files are typically stored on different volumes from the database files so caching is unnecessary.
  7. (Optional) Check Enable deduplication on newly created volumes using this policy if you want to enable deduplication.
  8. Choose a Limit Exceeded Behavior option to set the volume offline or non-writable if the limit of the volume is exceeded.
    NOTE: Volumes with a no-cache policy cannot be pinned.
  9. Click Create.
    The performance policy appears in the selection list when you create or edit a volume.