1. IISWC 2007 Panel Benchmarking in the Web 2.0 Era Prashant Shenoy UMass Amherst

2. Questions for Position Statement 1.What do you see as the key emerging workloads? 2.What are the most important hardware and software challenges for these applications? 3.What are the benchmarking challenges for these workloads/systems? 4.How can university researchers contribute?

3. Data Center Workloads Different types of data centers –Internet data center Youtube, Facebook, webmail –Enterprise data centers Business, financial apps –Hosting platforms 3rd party applications –Web, ecommerce, Amazon EC2 Workloads depends on type of data center

4. Technology Trends Virtualization –Data center apps run inside virtual servers –One or more VM mapped to a physical server Why? –Flexible mapping of virtual to physical resources –Isolation –Vary resources allocations dynamically –Live migration

5. Key Question How does a data center workload impact a virtualized server and vice versa? Scenario: –App running on physical server –Needs to move to a virtual server – What is the performance impact? –How do two VMs interact? Memory, I/O not fully isolated. CPU: impact on shared caches on multi-core cpus

6. Hurdle Many research ideas But… Few good workloads – SPECWEb, TPCW, –Rubis, Pet store –E-commerce centric, what about other types of data centers?

7. Research Opportunity Business apps –Apache openforbiz Traces –Youtube VM workloads / traces Need workloads for “large” environments –Representative of tens or hundreds of machines