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Version: 179691 (CentOS - 06/07/09)

Section: 1 (Commandes utilisateur)


fstate - Report information on LAM remote file daemon.


fstate [-ah] [-F <ndesc>] <nodes>


Report on active descriptors only.
Print the command help menu.
-F <ndesc>
Report up to a limit of <ndesc> descriptors.


Most MPI users will probably not need to use the fstate command. This command is only installed if LAM/MPI was configured with the --with-trillium switch.

The fstate command reports on open file descriptors maintained by the remote file daemon. With no options, information is printed on all open descriptors under the following headings:

the LAM descriptor handle, different than the client handle or actual UNIX handle
the open flags: R for read, W for write, A for active, L for locked active
the total number of bytes transferred in both directions
the node ID and process ID of the last client
the file name

The file deamon is a UNIX process, and UNIX processes are limited in the number of UNIX file descriptors (fd) that they can open at any one time. Yet the number of LAM processes is essentially unlimited. LAM descriptors are associated with each client's open user descriptors, and are used by LAM to identify the file. They are temporarily assigned UNIX file descriptors. When this happens, the status of the filed descriptor is active. Locked filed descriptors remain active continuously.


fstate h
Report all filed descriptors, representing every open file in the LAM network.


Il ne suffit pas d'être opportuniste, il faut encore l'être à temps.
L'opportunisme tardif : personnage de comédie.
-+- Gilbert Cesbron (1913-1979), de petites choses. -+-