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matlab: RunOpenEMS can search a list for a free host using FindFreeSSH

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This commit is contained in:
Thorsten Liebig 2011-07-07 08:11:39 +02:00
parent d8599ca3a4
commit b6d62858cc
2 changed files with 67 additions and 1 deletions
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55
matlab/FindFreeSSH.m Normal file
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@ -0,0 +1,55 @@
function host = FindFreeSSH(host_list, wait_time, command)
% function host = FindFreeSSH(host_list, wait_time, command)
%
% Find a free ssh host not running openEMS
%
% internal function used by RunOpenEMS
%
% host_list: give a list of possible host
%
% wait_time: wait x seconds after not finding a free host and rechecking
% default: 60 seconds
%
% command: unix command to check for free host (empty result --> free)
% default: 'ps -ewwo user,args | grep openEMS'
%
% See also RunOpenEMS
%
% openEMS matlab interface
% -----------------------
% author: Thorsten Liebig
if (nargin<3)
% command which should return an empty string if host is available
command = 'ps -e user,args | grep openEMS';
end
if (nargin<2)
wait_time = 60;
end
while 1
for n = 1:numel(host_list)
host = host_list{n};
[status, result] = unix(['ssh ' host ' ' command]);
if isempty(result)
disp(['FindFreeSSH:: found a free host: ' host ]);
return
else
disp(['FindFreeSSH:: ' host ' is busy running openEMS ... ' ]);
end
end
host = '';
if (wait_time<=0)
warning('openEMS:FindFreeSSH',' unable to find a free host ');
return
end
disp([' no free host found waiting for ' num2str(wait_time) ' seconds ... '])
pause(wait_time)
end

13
matlab/RunOpenEMS.m
View File

@ -12,6 +12,8 @@ function RunOpenEMS(Sim_Path, Sim_File, opts, Settings)
% (ssh only on unix with working ssh client)
% Settings.SSH.host = '<hostname or ip>'
% Settings.SSH.bin = '<path_to_openEMS>/openEMS.sh'
% ssh optional:
% Settings.SSH.host_list = {'list','of','hosts'}; %searches for a free host
%
% optional MPI:
% Settings.MPI.xxx --> help RunOpenEMS_MPI
@ -21,7 +23,7 @@ function RunOpenEMS(Sim_Path, Sim_File, opts, Settings)
%
% RunOpenEMS(Sim_Path,Sim_File,opts,Settings)
%
% See also WriteOpenEMS
% See also WriteOpenEMS FindFreeSSH
%
% openEMS matlab interface
% -----------------------
@ -51,6 +53,15 @@ if (isfield(Settings,'SSH') && isunix)
scp_options = '-C -o "PasswordAuthentication no" -o "StrictHostKeyChecking no"';
ssh_options = [scp_options ' -x'];
if isfield(Settings.SSH,'host_list')
host = FindFreeSSH(Settings.SSH.host_list);
if ~isempty(host)
Settings.SSH.host = host;
else
error('openEMS:RunOpenEMS', 'unable to find host, abort openEMS');
end
end
% create a tmp working dir
[status, result] = unix(['ssh ' ssh_options ' ' Settings.SSH.host ' "mktemp -d /tmp/openEMS_XXXXXXXXXXXX"']);
if (status~=0)