Networking Subsystem - Compaq 108164-003 - ProLiant - 800 White Paper

ECG007.0897
W P
HITE APER
(cont.)
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. . The 75% Read / 25% Write ratio, yielding the best response time in our test, is recommended by
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Novell and Compaq engineers. This improvement in performance can be explained by the
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. . additional read-related work the test script performs.
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Performance Comparison of Controller
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850
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800
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750
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. . Figure 5. Smart-2P Disk Array Controller Array Accelerator Configured with various Read/Write Ratios
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The chart above shows a performance comparison with the Array Accelerator read/write cache
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configured with two read/write ratios. As the chart illustrates, the 75% Read / 25% Write ratio
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. . yields the best response time for RAID 0.
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Networking Subsystem

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In a test environment that is purely Novell GroupWise, the networking subsystem is less likely to
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cause performance problems than the subsystem areas previously discussed. In an enterprise
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network environment, however, the network subsystem becomes a performance factor due to the
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replication that occurs between servers. The "Networking Subsystem" segment under
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"Performance Tuning" offers guidelines for identifying performance problems that are network-
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related. Also presented are network management guidelines, as well as strategies for increasing
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network throughput should this subsystem become the source of performance issues.
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This section deals with two performance enhancement strategies: segmenting the LAN and
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increasing the LAN bandwidth.
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Segmenting the LAN
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A key strategy that can increase networking subsystem performance is dividing a single Ethernet
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segment into multiple network segments. If you determine the networking subsystem is not
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reaching optimum throughput, there are two network implementations that can improve the
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overall throughput and general performance gain of a network.
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16
Configuration
R/W 50:50 R/W 75:25
Read Write Ratio