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lamgrow - Online in the Cloud

Run lamgrow in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command lamgrow that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


lamgrow - Extend a LAM multicomputer.

SYNOPSIS


lamgrow [-hvd] [-cpu num] [-n nodeid] [-no-schedule] [-ssi key value] hostname

OPTIONS


-cpu num Indicate how many CPUs are available to LAM on the new node.

-d Turn on debugging output. This implies -v.

-h Print useful information on this command.

-n nodeid Assign this ID to the new node.

-no-schedule Indicate that C and N expansion in mpirun and lamexec should not schedule on
this node.

-ssi key value
Send arguments to various SSI modules. See the "SSI" section, below.

-v Be verbose.

hostname Extend LAM with this host.

DESCRIPTION


An existing LAM universe, initiated by lamboot(1), can be enlarged to include more nodes
with lamgrow. One new node is added for each invocation. At a minimum, the host name
that will run the new node is given on the command line. If a different userid is
required to access the host, it is specified with the appropriate boot SSI options (see
lamssi_boot(7)).

The new node can be assigned any unused, non-negative identifier. If no identifier is
specified, the highest node identifier in the current LAM universe plus one is used. Note
that lamboot(1) always assigns node identifiers consecutively from 0.

lamgrow can be run from any node in the current LAM universe. Specifically -- it cannot
be run from the intended new host. Two invocations of lamgrow should not run
concurrently, and the command attempts to detect this situation. The name of the host
specified in lamgrow should not be the one which is already present in the user's LAM
universe and the command attempts to detect this situation too.

Resource managers will be the most common user of lamgrow. When hosts become idle and a
user has expressed a desire to the manager that extra cycles should be exploited, the
manager could invoke lamgrow and then launch the specified application process(es) on the
new node.

EXAMPLES


lamgrow -v newhost
Start LAM on newhost and add it to the existing LAM universe. Choose the next
available node identifier and report about important steps as they are done.

lamgrow -n 30 newhost
Start LAM on newhost with node ID 30 and add it to the existing LAM universe. Operate
silently.

Use lamgrow online using onworks.net services


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