1. Reliable PVFS

2. High Performance I/O ? Three Categories of applications demand good I/O performance  Database management systems (DBMSs) Reading or writing data in small pieces Fine-grained access  Multimedia applications Access large blocks of data  Scientific simulations Granularity may be coarse of fine Access pattern may be predictable or random

3. Parallel Virtual File System (1/3)

4. Parallel Virtual File System (2/3)

5. Parallel Virtual File System (3/3) Developed at Clemson University Does not implement any form of fault tolerance  RAID can be used to tolerate disk failures, but node failures ? CEFT-PVFS  RAID – 1+ 0  Build on top of PVFS  Have synchronization problem In Both metadata server and I/O servers

6. Architecture of RPVFS (1/2)

7. Architecture of RPVFS (2/2)

8. Evaluation (1/6)

9. Evaluation (2/6)

10. Evaluation (3/6)

11. Evaluation (4/6)

12. Evaluation (5/6)

13. Evaluation (6/6)