# gfs_pio_sync

## Name

gfs_pio_sync -- output a file's data on memroy to disk

## Synopsis

    #include <gfarm/gfarm.h>

```char *gfs_pio_sync``(GFS_File `gf`);`

## DESCRIPTION

The function `gfs_pio_sync` copies data on memory of the `gf`, and waits for the I/O to complete before returning. It also updates metadtata stat information, while another function `gfs_pio_datasync` does not update the metadata.

## RETURN VALUES

`NULL`

  The function terminated successfully.

`GFARM_ERR_NO_MEMORY`

  Insufficient memory was available.

Others

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

## SEE ALSO

gfs_pio_datasync(3), gfs_pio_create(3), gfs_pio_open(3), gfs_pio_write(3), gfs_pio_flush(3)