Reliable PVFS. High Performance I/O ? Three Categories of applications demand good I/O performance  Database management systems (DBMSs) Reading or writing.

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Presentation transcript:

Reliable PVFS

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

Parallel Virtual File System (1/3)

Parallel Virtual File System (2/3)

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

Architecture of RPVFS (1/2)

Architecture of RPVFS (2/2)

Evaluation (1/6)

Evaluation (2/6)

Evaluation (3/6)

Evaluation (4/6)

Evaluation (5/6)

Evaluation (6/6)