Vorwort - SSS-Tools für Power System i Syntax System Services
Vorwort - SSS-Tools für Power System i Syntax System Services
Vorwort - SSS-Tools für Power System i Syntax System Services
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3.2 Intelligent Storage<br />
By Lee Cleveland, Amit Dave and Russ VanDuine<br />
New RAID controllers offer highly advanced and virtualized storage solutions for the<br />
<strong>System</strong> i platform The IBM* <strong>System</strong> i* platform is regarded as one of the industry’s most<br />
scalable servers for high-volume transaction workloads, which are typical in the commercial<br />
computing environment. This scalability is largely delivered through the self-optimizing IBM<br />
i5/OS* integrated storage-management architecture. The use of intelligent disk-storage adapters<br />
and the performance delivered by these adapters is critical to delivering the overall balanced<br />
performance.<br />
<strong>System</strong> i intelligent disk-storage adapters have been called a number of names, such as RAID<br />
IOA, RAID IOP, RAID Controller, RAID Adapter, Storage IOA and Integrated Storage Adapter.<br />
Figure 1 shows the basic system building blocks and where the RAID controller fits in to this<br />
structure.<br />
This set of intelligent storage adapters is further enhanced with the introduction of the new<br />
high-performance RAID controllers (5777 and 5778). In this article, we’ll look closely at some<br />
of the innovations that are delivered with these intelligent storage adapters, typically not found<br />
in industry-standard RAID adapters.<br />
By design, the intelligent storage adapters are architected with an end-to-end view. The entire<br />
storage-management hierarchy, from main storage cache to disk caches, is optimized, providing<br />
balanced performance throughput that’s highly automated and managed by i5/OS.<br />
Continuing from IBM <strong>System</strong>/38* architecture, i5/OS storage management has always<br />
implemented data striping (RAID 0), which automatically distributes the data access across<br />
multiple disk arms to optimize performance. Additionally, the intelligent storage adapters deliver<br />
a significant amount of intelligence and performance optimization. This article highlights some<br />
of the important attributes of these intelligent storage adapters that make the overall integrated<br />
storage-management solution on the <strong>System</strong> i platform world-class.<br />
Read more about the following topics:<br />
• RAID Optimization<br />
• XOR on the Fly<br />
• RAID 5 and 6 without striping<br />
• RAID 6 using P + Q<br />
• Auto-configured RAID arrays<br />
• RAID array availability<br />
• Cache Architecture<br />
• RAID Advantages<br />
• Integrated Offering<br />
...more information<br />
BM <strong>System</strong>s Magazine Februar 2007<br />
www.inn-online.de < Seite > Seite: 39
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