Compaq 307560-001 Novell GroupWise Performance Management on Compaq Servers - Page 16

ECG007.0897 WHITE PAPER (cont.) 1...6 The 75% Read / 25% Write ratio, yielding the best response time in our test, is recommended by Novell and Compaq engineers. This improvement in performance can be explained by the additional read-related work the test script performs. Performance Comparison of Controller Configuration 850 800 750 700 650 600 550 500 R/W 50:50 R/W 75:25 Read Write Ratio Figure 5. Smart-2P Disk Array Controller Array Accelerator Configured with various Read/Write Ratios The chart above shows a performance comparison with the Array Accelerator read/write cache configured with two read/write ratios. As the chart illustrates, the 75% Read / 25% Write ratio yields the best response time for RAID 0. Networking Subsystem In a test environment that is purely Novell GroupWise, the networking subsystem is less likely to cause performance problems than the subsystem areas previously discussed. In an enterprise network environment, however, the network subsystem becomes a performance factor due to the replication that occurs between servers. The "Networking Subsystem" segment under "Performance Tuning" offers guidelines for identifying performance problems that are networkrelated. Also presented are network management guidelines, as well as strategies for increasing network throughput should this subsystem become the source of performance issues. This section deals with two performance enhancement strategies: segmenting the LAN and increasing the LAN bandwidth. Segmenting the LAN A key strategy that can increase networking subsystem performance is dividing a single Ethernet segment into multiple network segments. If you determine the networking subsystem is not reaching optimum throughput, there are two network implementations that can improve the overall throughput and general performance gain of a network.