46 IBM Flex System V7000 Storage Node Introduction and Implementation Guide
This function allows you to accomplish the following tasks:
– Move volumes non disruptively onto a newly installed storage system
– Move volumes to rebalance a changed workload
– Migrate data from other back-end storage to IBM Flex System V7000 Storage Node
managed storage
IBM System Storage Easy Tier (no charge):
Provides a mechanism to seamlessly migrate hot spots to the most appropriate tier within
the IBM Flex System V7000 Storage Node solution. This migration could be to internal
drives within IBM Flex System V7000 Storage Node or to external storage systems that
are virtualized by IBM Flex System V7000 Storage Node.
Real-time Compression (RTC):
Provides for data compression using the IBM Random-Access Compression Engine
(RACE), which can be performed on a per volume basis in real time on active primary
workloads. RTC can provide as much as a 50% compression rate for data that is not
already compressed. It can help with reducing the amount of capacity needed for storage
which can help with delaying further growth purchases. RTC supports all storage that is
attached to the IBM Flex System V7000 Storage Node whether internal, external, or
external virtualized storage.
A compression evaluation tool called the IBM Comprestimator can be used to determine
the value of using compression on a specific workload for your environment.
External Storage Virtualization (Licensed per enclosure of the external storage
subsystem):
With this feature, an external storage subsystem can be attached through the Fibre
Channel or by FCoE to the IBM Flex System V7000 Storage Node. These devices cannot
be presented through an iSCSI connection. The devices presented are treated as mdisks
and can be mapped to storage pools for volume creation and management. After the
storage from the external system is integrated into the IBM Flex System V7000 Storage
Node and added to a storage pool, it is available to be virtualized and used by any of the
features and functions of the IBM Flex System V7000 Storage Node.
2.3.3 IBM Flex System V7000 Storage Node licensing
IBM Flex System V7000 Storage Node might require the following licenses:
Enclosure
External Virtualization
Remote Copy (Advanced Copy Services: Metro Mirror / Global Mirror)
Real-time Compression (RTC)
External virtualization: External Storage Virtualization is supported only on FC and
FCoE but not iSCSI.
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