FCTL(1)

NAME
fctl - Control a LAM remote file daemon.

SYNTAX
fctl [-hS] [-s <descno>] <nodes> [<newdir>]

OPTIONS

-h  Print the command help menu.

-S  Sweep out all but the standard filed descriptors.

-s <descno>
    Sweep out the given filed descriptor.

<nodes>
    Direct command to filed on these nodes.

<newdir>
    Change to new working directory.

DESCRIPTION
Most MPI users will probably not need to use the fctl command; see lamclean(1).

The fctl command controls important file daemon (filed) attributes and support features. With no options, fctl reports the current working directory that is prepended to all partial pathnames on rfopen(2). A file name on the command line becomes the new working directory.

Another important role of fctl is cleaning the debris that can form in filed in certain application crashes or bugs. Any file descriptor can be swept clean by indicating its handle (number) with the -c option. If desired, all descriptors, save stdio (0, 1, 2), can be cleaned and filed effectively reset with the -S option.

EXAMPLE

fctl h data/set1
    Change current working directory as indicated.

fctl h -s 4
    Close and remove filed descriptor 4.

SEE ALSO
fstate(1), lamclean(1)