| Use the Hardware Sizing worksheet prior to testing in order to estimate the hardware requirements for a production web site. After completing the test, use this worksheet as input to the Capacity Planning worksheet, which is included in this appendix. See the case study in Chapter 14, as well as Chapter 15, for examples using this worksheet. Input Data | | Input Data | Source | Your Data | | 1. | Concurrent users | Capacity Sizing worksheet, line 12 | | | 2. | Throughput: page rate | Capacity Sizing worksheet, line 13 | | | 3. | Throughput: requests | Capacity Sizing worksheet, line 14 | | | 4. | Response time | Marketing | | | 5. | Headroom factor | Marketing/planning | | | 6. | Estimated throughput supported on your selected hardware | Hardware/application server vendor | | Calculating Hardware Requirement Estimate (Pre-Test) | | Calculated Data | Calculation | Total | | 7. | Concurrent users (with headroom) | Concurrent users + Concurrent users / (100 / Headroom “ 1) Line 1 + Line 1 / (100 / Line 5 “ 1) | | | 8. | Throughput requirement (with headroom): page rate | Throughput + Throughput / (100 / Headroom “ 1) Line 2 + Line 2 / (100 / Line 5 “ 1) | | | 9. | Throughput requirement (with headroom): requests | Throughput + Throughput / (100 / Headroom “ 1) Line 3 + Line 3 / (100 / Line 5 “ 1) | | | 10. | Application servers required | Throughput requirement (dynamic requests) / Estimated throughput for your hardware + 1 (for maintenance) Line 8 / Line 6 + 1 | | |