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
8KB
64KB
Decision Support System DB
1MB
READ
RANDOM
Media Streaming
98% RD vs. 2% WR
SEQUENTIAL
SQL Server Log
WRITE
OS Paging
90% RD vs. 10% WR
Web Server Log
OLTP DB
70% RD vs. 30% WR
Exchange Server
67% RD vs. 33% WR
Workstation
80% RD vs. 20% WR
80% RAND vs. 20% SEQ
Video on Demand
512KB
Enjoy - Tony Voellm