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 quota 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 will be created on the downstream partner, if needed. If a performance
policy already exists that is not identical, the partners may fail to
synchronize.
Procedure
- Choose A list of all performance policies and the number of volumes associated with them is displayed. .
- Click the + sign to create a new performance policy.
- Enter a name that reflects the best use of the policy.
- Choose an Application Category from the drop-down list.
-
(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.
-
(Optional) Uncheck the 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.
- (Optional) Check Enable deduplication on newly created volumes using this policy if you want to enable deduplication.
-
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.
- Click Create. The performance policy appears in the selection list when you create or edit a volume.