A buddy of mine [Liang Yang] recently shared the following table with me and I thought you might also find it useful with trying to simulate various workloads. In particular when testing and evaluating Hyper-V. A tool like IOMeter [from www.iometer.org] can be programmed with the mixes of reads/wrtes and sequential/random IO's detailed below.
| Workload Category | I/O Size | Percentage of READ vs. WRITE | Percentage of RANDOM vs. SEQUENTIAL |
| Web File Server | 4KB | 95% RD vs. 5% WR | 75% RAND vs. 25% SEQ |
| Web File Server | 8KB | 95% RD vs. 5% WR | 75% RAND vs. 25% SEQ |
| Web File Server | 64KB | 95% RD vs. 5% WR | 75% RAND vs. 25% SEQ |
| Decision Support System DB | 1MB | READ | RANDOM |
| Media Streaming | 64KB | 98% RD vs. 2% WR | SEQUENTIAL |
| SQL Server Log | 64KB | WRITE | SEQUENTIAL |
| OS Paging | 64KB | 90% RD vs. 10% WR | SEQUENTIAL |
| Web Server Log | 8KB | WRITE | SEQUENTIAL |
| OLTP DB | 8KB | 70% RD vs. 30% WR | RANDOM |
| Exchange Server | 4KB | 67% RD vs. 33% WR | RANDOM |
| Workstation | 8KB | 80% RD vs. 20% WR | 80% RAND vs. 20% SEQ |
| Video on Demand | 512KB | READ | RANDOM |
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