Compaq 108164-003 - ProLiant - 800 White Paper page 20

ECG007.0897
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HITE APER
(cont.)
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. . In order to avoid I/O contention, the following Server Configuration of ProLiant 5000 is
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recommended.
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Table 4. Server Configuration of ProLiant 5000
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One network controller and one array controller
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Device
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. .
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10/100 TX PCI UTP
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. .
SMART-2/P Array
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One network controller and two array controllers
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. .
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Device
. .
. .
10/100 TX PCI UTP
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. .
SMART-2/P Array
. .
. .
. .
SMART-2/P Array
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Two network controllers and one array controller
. .
. .
. .
Device
. .
. .
10/100 TX PCI UTP
. .
. .
SMART-2/P Array
. .
. .
. . 10/100 TX PCI UTP
. .
. .
Two network controllers and two array controllers
. .
. .
Device
. .
. .
. .
10/100 TX PCI UTP
. .
. .
SMART-2/P Array
. .
. .
10/100 TX PCI UTP
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. .
. .
SMART-2/P Array
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Hard Disk Controller Tuning
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. . Some of these features offer performance and fault tolerance advantages, which were discussed in
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an earlier section detailing hardware versus software striping, and the number of drives supported
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. . in an array. Now the performance impact of the Smart-2 Controller Array Accelerator will be
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examined.
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The Smart-2 Controller Array Accelerator serves as a read-ahead and write cache that
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. .
dramatically improves the performance of read and write commands. The Array Accelerator
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performance gains are best seen in database and fault-tolerant configurations. The Smart-2
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. .
Controller writes data to 4 MB of cache memory on the Array Accelerator rather than directly to
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the drives, allowing the system to access this cache more than 100 times faster than accessing the
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. . disk. The data in the Array Accelerator is written later to the drive array by the Smart-2
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Controller when the controller is otherwise idle.
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20
Bus
Secondary 2
Primary 5
Bus
Secondary 2
Primary 5
Secondary 3
Bus
Secondary 2
Primary 5
Primary 6
Bus
Secondary 2
Primary 5
Primary 6
Secondary 3
Slot
Slot
Slot
Slot