Benchmark environment
RAID-5 setup
- 3GB volume, 4 active 1GB disks, 1 hot spare disk
Workload generator and data collector
- SPECWeb99 web benchmark
- simulates realistic high-volume user load
- mostly static read-only workload
- modified to run continuously and to measure average hits per second over each 2-minute interval
QoS metrics measured
- hits per second
- roughly tracks response time in our experiments
- degree of fault tolerance in storage system