After a storage space is defined, you can start adding
storage services to the space.
About this task
Storage services contain one or more physical storage pools.
In addition to storage capacity, a service has a set of capabilities,
defining the storage quality, such as thin/thick provisioning, snapshots,
encryption, etc.
The services that you add become available for
the solution components included in the Spectrum Control package (see Included cloud interfaces). When provisioning storage,
the end users consume it from the spaces and services without dealing
underlying physical storage infrastructure.
You can add each
individual storage service separately, as described in the following
procedure.
Procedure
In the Spaces tab of the Spaces/Services pane, select a
space on which you want to create a new service.
Click Add button on the Spaces/Services
pane. The Add New Service dialog box is displayed.Figure 1. Add New Service dialog box
Enter parameters for the new service, according to the
table below.
Table 1. Service parameters
Parameter
Description and values
Name
Alphanumeric string for service identification.
This is a mandatory field.
Description
Alphanumeric string for service description.
Over-provisioning
Percentage of over-provisioned storage space
on the service, defining the ratio between logical and physical storage
capacity. For example, when configured to 100, it sets a 1:1 ratio
between the two values, while a value of 200 defines the logical capacity
(soft size) to be twice the physical capacity (hard size).
Configuration
considerations
The recommended over-provisioning value for
a VVOL-enabled service with XIV® storage systems is 400%. The XIV utilizes thin provisioning for all VM configuration volumes. When
creating a regular VM on an XIV disk, you can choose the provisioning mode, according to your application
requirements.
For other cases, you can choose any value:
100%, if you do not want to utilize thin provisioning.
Above 100%, if you want to take a risk of allocating resources
that the XIV storage system
may not have.
In addition, when utilizing the over-provisioning, XIV storage systems must be also
configured to allow support for this feature. When used with the XIV domains, the domain must be
also configured with matching soft and hard capacity settings. To
enable the VVOL functionality at the XIV side, do the following:
Enable a metadata service.
Create a managed domain.
Define a user with category storageintegrationadmin.
Associate the storageintegrationadmin user with the
domain.
Define an ESXi host and associate it with the domain.
The over-provisioning is not relevant for the Storwize® Family and DS8000® storage arrays.
Configuration
examples
Storage pools in a regular service with over-provisioning at 100%
are created as thick pools.
Storage pools in a regular service with over-provisioning at 150%
are created as thin pools. If a hard pool size is 500GB, its soft
size is 750GB.
Group storage pools in a VVOL-enabled service with over-provisioning
at 400% are created as thin pools with their soft sizes to be four
time bigger than their hard sizes.
Snapshot
Percentage of storage space on the service reserved
for snapshots.
Encryption
Enables or disables encryption for the service.
When it is set to Any, the storage user ignores
the encryption attribute of the underlying physical storage.
Space Efficiency
Enables thin or thick provisioning for the service.
When it is set to Any, the storage user ignores
the provisioning attribute of the underlying physical storage.
VVOL Service
Enables VVOL functionality for the service.
Automatic resource adjustment
Controls automatic adjustment of a storage resource,
according to the settings of a service, to which the resource is attached.
For example, when adding existing storage pools to a service with
certain over-provisioning and snapshot settings, the pool sizes will
be changed to match the service requirements. To prevent this, disable
the automatic resource adjustment.
This parameter is always On
for VVOL-enabled services.
Important: The following requirements
apply to the VVOL-enabled services:
All storage pools attached to a VVOL-enabled service must reside
on the same array.
Only one VVOL-enabled service is allowed per an array and per
storage space.
Click Apply to finish the procedure. A new service is added to the current Spaces tab.
