IBM Storwize V7000, Руководство пользователя

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Real-time Compression
The Real-time Compression
™
function is a separately orderable license that
is set on a per enclosure basis. One license is required for each control or
expansion enclosure and each enclosure in any external storage systems
that use virtualization. With the compression function data is compressed
as it is written to disk, saving extra capacity for the system.
In addition to these licenses, enclosure licenses are also required for the Easy Tier
and FlashCopy functions on certain models of systems. These two functions are
not tracked by the system and do not require any additional input on this page to
operate. For auditing purposes, retain the license agreement for proof of
compliance.
Performance of Fibre Channel extenders
When you are planning to use Fibre Channel extenders, be aware that the
performance of the link to the remote location decreases as the distance to the
remote location increases.
For Fibre Channel IP extenders, throughput is limited by latency and bit error
rates. Typical I/O latency can be expected to be 10 microseconds per kilometer. Bit
error rates vary depending on the quality of the circuit that is provided.
You must review the total throughput rates that might be expected for your
planned configuration with the vendor of your Fibre Channel extender and your
network provider.
Planning for software
You must plan to provide the necessary software prerequisites for the installation
and operation of your system.
Installation knowledge and skills
It is important that anyone who has the responsibility for installing the system
have some key information and skills.
Ensure that the people authorized to install the system have the necessary
knowledge and skills. Before beginning the installation, they should have an
understanding of:
v
File storage and NAS systems.
v
Networking topology and configuration.
v
The types of authentication that will be used in the installed system.
Refer to related topics in the sections of the Information Center on configuring,
using the file system, and administering the file system for more information on
file storage, networking, configuration, and authentication.
Web browser requirements to access the management GUI
You must have a supported web browser to access the management GUI.
To ensure that your web browser is supported and has the appropriate settings
enabled, see the topic in related tasks about checking your web browser settings
for the management GUI.
Chapter 2. Planning for adding file modules
37