1. ADIOS IO introduction Yufei Dec 10

3. System at Oak Ridge 672 OSTs 10 Petabytes of storage 60 GB/sec = 480 Gbps aggregate performance (theoretical) 225,000 compute cores

4. Prior Work Driver-level work for disk access System-level strategies for effective buffering Alternative file organizations (striping as Lustre) Novel method data staging alternative file formats or organizations better ways to organize and update file metadata

5. Interference

6. Adaptive I/O Dynamic and proactive methods for managing IO interference shift work from heavily used areas of the storage system to those that are more lightly loaded. IO Middleware

7. Internal Interference Effect

8. External Interference Effect

9. Imbalanced Concurrent Writers

10. Adaptive IO

11. Components Writer Sub-Coordinator Coordinator

12. Experimental Evaluation MPI-IO vs Adaptive IO

13. FAQ