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gfs_pio_set_view_local

NAME

gfs_pio_set_view_local - change file view to the corresponding fragment

SYNOPSIS

#include <gfarm/gfarm.h>

char *gfs_pio_set_view_local (GFS_File gf, int flags);

DESCRIPTION

gfs_pio_set_view_local() changes the process's view of the data in the file specified by gf to a file fragment in the local file view. The local file view model assumes each process has its own file fragment which is specified by the argument node of gfs_pio_set_local(3).

The total number of file fragments is also specified by the argument nnode of gfs_pio_set_local(3). If it is different from the total fragment number of the existent file, it is erroneous.

Before changing to the local file view, it is necessary to call gfs_pio_set_local(3) in advance.

Values of flag are constructed by a bitwise-inclusive-OR of GFARM_FILE_SEQUENTIAL, GFARM_FILE_REPLICATE, and GFARM_FILE_NOT_REPLICATE. For details, refer to gfs_pio_set_view_index(3).

By default, Gfarm files are accessed as a whole file in global file view where each fragment can be seamlessly accessed.

RETURN VALUES

NULL

The function terminated successfully.

GFARM_ERR_NO_MEMORY

Insufficient memory was available.

GFARM_ERR_OPERATION_NOT_PERMITTED

The file is not a fragmented file.

GFARM_ERR_FRAGMENT_NUMBER_DOES_NOT_MATCH

The total number of file fragments is different from the existence one.

Others

An error except the above occurred. The reason is shown by its pointed strings.

SEE ALSO

gfs_pio_create(3), gfs_pio_open(3), gfs_pio_set_local(3), gfs_pio_set_view_index(3)