You can modify the attributes of a service class to change
the provisioning requirements, capacity pool storage constraints,
user permissions, and service class name.
You must have Administrator privileges to modify a service
class.
Important: When volumes or shares are provisioned
by specifying a service class, they are associated with the service
class. The Volumes page and the Shares page
in the web-based GUI can
display the name of the service class that was used to provision the
volume or share. If you modify a service class, the volumes or shares
are still associated with the service class, but might be on storage
resources that no longer satisfy the requirements of the service class.
Depending on your changes to the service class, users might incorrectly
assume that the new volumes or shares have attributes that they do
not possess.
Start this task at the Service Classes page.
To open the Service Classes page, select . To
modify a service class, complete the following steps:
- From the list of service classes, select a service class
and then select .
The service
class properties window is displayed.
- Optional: Click the General tab
to modify the general attributes of the service class.
Most
of the general properties specify requirements for provisioning. Some
of the general properties specify configuration instructions for the
storage resources or for the volumes or shares that are provisioned
from them.
Tip: To display help information about a service
class property, move the mouse pointer over the field or control.
Then, move the mouse pointer over the question mark icon displayed
next to the field.
- Optional: Specify or modify the advanced properties of
the service class.
- From the General tab, click Advanced.
- If you are modifying a block-storage service class,
and thin provisioning is enabled for the service class, specify configuration
instructions for thin provisioning.
-
If you are modifying a block-storage service class, select how the multipath driver on
the host is configured.
- Create custom requirements for the service class by
specifying up to three custom tags. To provide the service class,
storage resources must have all the same tags that are specified in
the service class.
- Optional: Modify storage constraints.
If one
or more capacity pools are defined in the IBM Spectrum®
Control database,
you can associate the service class with one or more capacity pools.
If capacity pools are associated with the service class, future provisioning
requests that specify the service class can be satisfied only by storage
resources in the capacity pools. If a capacity pool was previously
associated with the service class, you can disassociate it from the
service class.
- Optional: Modify user permissions.
By default,
users must be assigned to the Administrator role to provision storage.
However, you can selectively grant users who are limited to the Monitor
or External Application role permission to provision by using this
service class. You can also specify whether administrator approval
is required to run provisioning tasks that are created by these users.
If
users in the Monitor or External Application roles have permission
to provision by using the service class, you can revoke that permission.
You can specify that only administrators can provision by using the
service class, or you can selectively remove users. To remove a user,
right-click the user name in the table and then select Remove from
the context-sensitive menu.