498 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
You can modify the resource allocation for each I/O group of an IBM SAN Volume Controller 
system by opening the Settings → System window and clicking the Resources menu, as 
shown in Figure 11-63.
Figure 11-63   Modifying resources allocation per I/O group
11.3  Transparent Cloud Tiering
Introduced in V7.8, Transparent Cloud Tiering is a function of IBM Spectrum Virtualize that 
uses IBM FlashCopy mechanisms to produce a point-in-time snapshot of the data. 
Transparent Cloud Tiering helps to increase the flexibility to protect and transport data to 
public or private cloud infrastructure. This technology is built on top of IBM Spectrum 
Virtualize software capabilities. Transparent Cloud Tiering uses the cloud to store snapshot 
targets and provides alternatives to restore snapshots from the private and public cloud of an 
entire volume or set of volumes.
Transparent Cloud Tiering can help to solve business needs that require duplication of data of 
your source volume. Volumes can remain online and active while you create snapshot copies 
of the data sets. Transparent Cloud Tiering operates below the host operating system and its 
cache. Therefore, the copy is not apparent to the host.
IBM Spectrum Virtualize has built-in software algorithms that allow the Transparent Cloud 
Tiering function to securely interact, for example with Information Dispersal Algorithms (IDA), 
which is essentially the interface to IBM Cloud Object Storage.
Object storage refers to the entity in which IBM Cloud Object Storage organizes, manages, 
and stores units of data. To transform these snapshots of traditional data into object storage, 
the storage nodes and the IDA import the data and transform it into a number of metadata 
and slices. The object can be read by using a subset of those slices. 
When an object storage entity is stored as IBM Cloud Object Storage, the objects must be 
manipulated or managed as a whole unit. Therefore, objects cannot be accessed or updated 
partially.
IBM Spectrum Virtualize uses internal software components to support HTTP-based REST 
application programming interface (API) to interact with an external cloud service provider or 
private cloud.