Improving file system reliability with I/O shepherding

Implementing MPI-IO Shared File Pointers Without File System Support

The ROMIO implementation of the MPI-IO standard provides a portable infrastructure for use on top of any number of different underlying storage targets. These targets vary widely in their capabilities, and in some cases additional effort is needed within ROMIO to support all MPI-IO semantics. The MPI-2 standard defines a class of file access routines that use a shared file pointer. These routin...

Improving Generic Non-contiguous File Access for MPI-IO

We present a fundamental improvement of the generic techniques for non-contiguous file access in MPI-IO. The improvement consists in the replacement of the conventional data management algorithms based on a representation of the non-contiguous fileview as a list of 〈offset , length〉 tuples. The improvement is termed listless i/o as it instead makes use of spaceand time-efficient datatype handli...

Improving File System Performance With Adpative Methods

Improving File System Reliability and Availability with Continuous Checker and Repair

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Fault Tolerant File Models for MPI-IO Parallel File Systems

Abstract. Parallelism in file systems is obtained by using several independent server nodes supporting one or more secondary storage devices. This approach increases the performance and scalability of the system, but a fault in one single node can make the whole system fail. In order to avoid this problem, data must be stored using some kind of redundant technique, so that it can be recovered i...