IBM Storwize V7000, Введение и руководство по внедрению

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Chapter 6. Basic volume and host configuration
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4. The summary shows you the capacity information and the allocated space. You can click
Advanced and customize the thin-provision settings (Figure 6-8 on page 261) or the
mirror synchronization rate (Figure 6-13 on page 265). If you have opened the advanced
settings, click OK to return to Figure 6-17.
5. Click Create and the mirrored volume is created (Figure 6-18).
Figure 6-18 Thin Mirror volume creates - CLI command displays
6. After the task is completed, click Close
You can choose to map the new volumes immediately as part of the volume create wizard by
clicking Create and Map to Host. It will guide you through the Map to Host wizard described
in 6.3, “Mapping a volume to the host” on page 279.
6.1.5 IBM Real-time Compression
SVC version 6.4 (and higher) has the capability of compressing volumes, using the innovative
IBM Real-time Compression technology that is embedded software within the software stack.
The latest version 7.1 has enhancements such as intelligence to automatically detect and
judge if a block is a good candidate for compression. If the compression software detects that
a block is unlikely to achieve a reasonable compression ratio, it will skip compression for that
block and pass it to the back-end storage. There are several benefits using this technology,
the main one being that it reduces disk capacity required to store data by up to 80%, thus
improving efficiency and controlling storage costs.
Compression benefits
The IBM Real-time Compression solution addresses the requirement for reducing IT costs by
reducing the amount of physical capacity required. This in turn will reduce required physical
storage, power, cooling, and potentially floorspace. Implementing Real-time Compression in
IBM Flex System V7000 Storage Node provides the following benefits:
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Compression for active primary data:
IBM Real-time Compression can be used with active primary data, therefore it supports
workloads that are not candidates for compression in other solutions. The solution
supports online compression of existing data and allows storage administrators to gain
back free disk space in the existing storage system without enforcing administrators and