Create a Performance Policy with Deduplication Enabled
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 space or capacity limits are exceeded.
You can associate a volume with an existing performance policy or
create a new one.
Note:
- Deduplication can be enabled only on All Flash, Secondary Flash, and select models of Adaptive Flash arrays.
- If a particular group does not support deduplication, the checkbox to enable deduplication is not visible.
- If a particular group consists only of All Flash or Secondary Flash arrays, the checkbox to enable caching is not visible.
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.
- Type 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.
- Check Enable deduplication on newly created volumes using this policy to enable deduplication.
-
Choose a Limit Exceeded Behavior
option to set the volume offline or non-writable if its capacity or space quota
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.
Results
Important: When you
replicate a volume using this policy, use an identical policy for the volume on the
replication partner.