Content-type: text/html Manpage of PLFS

PLFS

Section: User Commands (1)
Updated: 12/3/2010
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NAME

PLFS (Parallel Log Structured File System) - PLFS-MNT information  

SYNOPSIS

./plfs [ fuse_options ] < mount point >

 

DESCRIPTION

This command is to mount PLFS to use the PLFS-MNT method. See plfs(7) for more information on other ways to use PLFS.

In many parallel file systems such as Lustre, GPFS, and PanFS, concurrent writes from large numbers of processes to a shared file suffers poor performance due to low-level serialization in the parallel file system. PLFS transparently rearranges concurrrent writes to avoid this serialization.

In many parallel file systems such as Lustre, GPFS, and PanFS, concurrent writes from large numbers of processes to a shared file suffers poor performance due to low-level serialization in the parallel file system. PLFS transparently rearranges concurrrent writes to avoid this serialization.

This interface provides the most transparency to the user. PLFS is mounted as a file system and users simply perform normal file system operations. This option requires FUSE. Although this option gives improved performance, very large-scale parallel applications are encouraged to use the PLFS-MPI-IO interface which provides even larger improvements.

 

INPUTS

fuse options
See fuse documentation for possible options. The most relevant to plfs are:
direct_io
Available for older versions of fuse. This option doesn't allow executables to be run in the mount point but increases performance for PLFS.
big_writes
Available for newer versions of fuse. Includes benefits of direct_io option and allows executables to be run in the mount point.

 

RETURN VALUE

A 1 is returned on success and 0 or -errno is returned on failure.

 

FILES

In order to use any of these interfaces, a configuration file must be present on the system. (see plfsrc(5) ).

 

AUTHORS

PLFS is developed at Los Alamos National Laboratory and is available under LANL LA-CC-08-104. It is hosted at http://sourceforge.net/projects/plfs and more information is available at http://institute.lanl.gov/plfs

 

SEE ALSO

plfs(1), plfs(7), plfs_check_config(1), plfs_flatten_index(1), plfs_map(1)

 

Index

NAME
SYNOPSIS
DESCRIPTION
INPUTS
RETURN VALUE
FILES
AUTHORS
SEE ALSO
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Time: 14:33:59 GMT, June 15, 2012