772 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
/SM590000Over provisioned ratio
The ratio of provisioned capacity to usable capacity in the pool or system.
/SM590000Provisioning limit - maximum provisioned capacity - over provisioning limit
In some storage systems, restrictions in the storage hardware or configured by the user 
that define a limit the maximum provisioned capacity allowed in a pool or system.
Capacity licensing
Capacity licensing is a licensing model that licenses features with a price-per-terabyte model. 
Licensed features are FlashCopy, Metro Mirror, Global Mirror, and virtualization. See also 
“FlashCopy” on page 776, “Metro Mirror” on page 780, and “Virtualization” on page 787.
Chain
A set of enclosures that are attached to provide redundant access to the drives inside the 
enclosures. Each control enclosure can have one or more chains.
Challenge Handshake Authentication Protocol
Challenge Handshake Authentication Protocol (CHAP) is an authentication protocol that 
protects against eavesdropping by encrypting the user name and password.
Channel extender
A channel extender is a device that is used for long-distance communication that connects 
other storage area network (SAN) fabric components. Generally, channel extenders can 
involve protocol conversion to asynchronous transfer mode (ATM), Internet Protocol (IP), or 
another long-distance communication protocol.
Child pool
Administrators can use child pools to control capacity allocation for volumes that are used for 
specific purposes. Rather than being created directly from managed disks (MDisks), child 
pools are created from existing capacity that is allocated to a parent pool. As with parent 
pools, volumes can be created that specifically use the capacity that is allocated to the child 
pool. Child pools are similar to parent pools with similar properties. Child pools can be used 
for volume copy operation. Also, see “Parent pool” on page 781.
Cloud Container
Cloud Container is a virtual object that includes all of the elements, components, or data that 
are common to a specific application or data.
Cloud Service Provider
Cloud Service Provider (CSP) is the company or organization that provides off- and 
on-premises cloud services, such as storage, server, and network. IBM Spectrum Virtualize 
includes built-in software capabilities to interact with Cloud Providers such as IBM SoftLayer, 
Amazon S3, and deployments of OpenStack Swift.
Cloud Tenant
Cloud Tenant is a group or an instance that provides common access with the specific 
privileges to an object, software, or data source.