Gfarm/BB is an on-demand user-level file system for node-local
storages on compute nodes. gfarmbb
starts a Gfarm/BB and stops it.
The mode
should be start, stop
or status. When the mode is start, it displays the environment
variable that should be eval'ed to use Gfarm commands as follows;
% eval `gfarmbb start`
Basically, specify the same option for start, stop and status.
-mpi
mpirun_cmd
sets up Gfarm/BB using MPI instead of gfarm-prun.
mpirun_cmd
is a command
line to execute MPI that is used to configure and execute gfsd on each
node. MPI command should execute 1 process per node.
This option should be used with the -conf option. When using
this option, the -e option and the -h option are ignored.
-e
excludes Gfmd node from file system nodes. Gfmd is executed on the node where gfarmbb is executed. With this option, gfsd is not executed on that node. This option expects there are N + 1 node allocations, and gfarmbb is executed on the last host in the hostfile. This option is available only for gfarmbb start.
-h
hostfile
specifies a hostfile
that
contains a list of hostnames of compute nodes.
-scr
scratch_dir
specifies a scratch directory on each compute node for Gfarm/BB. If it does not exist, it is created. This directory will be removed by gfarmbb stop. Default is /tmp/gfarmbb-scratch.
-conf
conf_dir
specifies a scratch directory that can be shared among compute nodes to store temporal configuration files. If it does not exist, it is created. This directory will be removed by gfarmbb stop.
-l
enables access to Gfarm/BB from login nodes. With this option, the Gfarm/BB configuration file $HOME/.gfarm2rc-$ID is created in the home directory. ID consists of the hostname of the master compute node and the process ID. To access to Gfarm/BB, specify it by GFARM_CONFIG_FILE environment variable.
-L
log_dir
specifies a log directory. If it does not exist, it is created. Log file names of gfmd and gfsd are gfmd-$ID.log and gfsd-$ID.log, respectively. Default directory is scratch_dir/log. This option is available only for gfarmbb start.
-m
mount_point
When this option is specified, a Gfarm/BB is mounted at the specified mount point on each compute node. mount.gfarm2fs is required. This option is available only for gfarmbb start.
-p
period
specifies the period of a shared secret key in seconds for Gfarm/BB. This period should be longer than the job execution duration. Default is 86400 seconds (1 day). This option is available only for gfarmbb start.
-c
generates C-shell commands. This option is available only for gfarmbb start.
-s
generates Bourne shell commands. This option is available only for gfarmbb start. This is default.