Nagios is a monitoring tool that mediates several plugins that find useful information to the user, such as cpu usage, ping time reply, disk usage, ram usage, etc ...

==External References==
*[http://omdistro.org/doc/quickstart_debian_ubuntu OMD for debian ubuntu]
*[http://mathias-kettner.com/check_mk.html Check_mk]

[Category:Linux]

Nagios

2013-07-02T15:28:07Z

Guillaume:

2013-06-14T22:58:41Z

Guillaume:

[[SPH|Smoothed-Particle Hydrodynamics]] is a computational technique to simulate fluid dynamics using a mesh-free lagrangian-tracer approach. The mesh-free lagrangian tracers can represent any property, from granulate to continuum in nature, from sand particles, to density, to fluid momentum and vorticity. [[SPH]] estimates any property value on any point of the domain based on the lagrangian tracers in the vicinity, weighted by a kernel function. The lagrangian tracers, in turn, are transported by the very same velocity field they generate. They are also subjected to any physical process whose continuum field they previously generated. This allows to generate highly non-linear continuum fields, most unlike the traditional structured-mesh algorithms, which can realistically simulate, for example, wave breaking, flooding, two-phasic flow interaction.

Because of the lagrangian-tracer nature of SPH, it has been successfully parallelized in both MPI and GPU architectures, with performance increases in the order of 100 for the latter; thus making this technique more and more interesting for realistic fluid simulation scenarios.

The mesh-free nature of SPH allows it simulate extremely turbulent and non-linear flow, filling and emptying extremely complex volumes.

Both of these interesting features, many million particle simulation at competitive performance thanks to GPU computind and non-linear flow filling and emptying very complex volumes, makes SPH very attractive as a service to maritime industry and some companies, such as HydrOcean, estimate an increase of its use, at the request of clients in the industry, in the forthcoming years.

==History==

==State-of-the-art==

== External references ==
*[http://en.wikipedia.org/wiki/Smoothed-particle_hydrodynamics Smoothed-Particle Hydrodynamics on Wikipedia]

==Major publications on SPH==

SPH

2013-06-14T22:45:03Z

Guillaume:

SPH

2013-06-14T22:44:43Z

Guillaume:

SPH

2013-06-14T22:34:17Z

Guillaume:

[[SPH|Smoothed-Particle Hydrodynamics]]

==History==

==State-of-the-art==

== External References ==
*[http://en.wikipedia.org/wiki/Smoothed-particle_hydrodynamics Smoothed-Particle Hydrodynamics on Wikipedia]

==Publications on SPH==

2012-04-13T11:56:35Z

Guillaume: /* Redirecting output */

[[Batch]] files are the original ms-dos scripting language. A [[batch file]] is a script that contains a list of ms-dos commands, with one command per line. When you try to execute the batch file, it will execute the ms-dos commands, one after another, waiting for each command to finish before starting the next one.
==Examples==
===For===
The following example will output each line of the text file to the stdout:
> FOR /F %i in (list.txt) DO @echo %~ni

The following example will allow to parse and edit the environment variables ('''invoke the command line with CMD /V'''):
> for /F %i in ('dir /B /S *_1.dat') do @set subs=21 @set fil=%i & copy /Y !fil! !fil:20=%subs%!
'''If you want to write '''FOR''' loops in a batch file instead of the command line, then use '''%%i''' instead of '''%i'''.'''

To place the first line of a file into a variable:
> SET /P _MyVar=<MyFilename.txt

To place the ''last'' line of a file into a variable:
> FOR /F "tokens=*" %A IN (C:\boot.ini) DO SET TestVar=%A

Nested FOR Loops
> FOR /F %a IN (filelist.txt) DO (FOR /F %b IN (salinitytemperature.txt) DO echo %a %b)

Nested FOR loops encapsulated in a batch file
for /F %%a in (%1) do (
for /R %%b in (../*) do (
echo %%a
echo %%b
)
)

To set variables with delayed expansion inside IF or FOR directives, use the ! character instead of the %.
for /f %%i in (revisions.log) do @(
set VARIT=%%i
set VARIT=!VARIT:~1!
if !VARIT! LEQ 44000 echo !VARIT!
)

===Delimeters===
This command will look for the first underscore in the list of filenames
and will split each filename in two at the underscore.
> for /f "tokens=1-4 delims=_" %i in ('dir /B *.eps') do @echo %i %j %k %l
[http://ss64.com/nt/for_f.html Check out this site for more.]

===If...Else...===
Example of a "if ... else ..." flow structure
> IF %1.==. (SET /P REVIS=<revisions.log) ELSE (SET REVIS=%1)

==Misc==
===Manipulating environment variables===
Substring find and replace
> set HELLO=HelloWorld
> echo %HELLO:l=w%
echo> HewwoWorwd

Substring
> set HELLO=HelloWorld
> echo %HELLO:~1%
echo> elloWorld

Extension stripping
> For /F %%i in (list.txt) DO echo %%~ni

See more help
>set /?

===Redirecting output===
How to redirect output from both standard output and standard error to a file
> echo Hello World > filename.txt 2>&1

How to redirect Standard Output and Standard Error to separate files
> echo Hello World > logfile.txt 2> errorlog.txt

===Escaping characters===
<,|,> and % characters are special characters in dos. To escape them use the ^ character or a double %
> echo ^<example^>
<example>
===Displaying blank lines===
Use command echo to display a blank line instead of its default status result
>echo.

==Sample applications==

===Copy a clean MOHID project===
Here's a combination with a batch file, that creates a clean copy of a MOHID simulation:

> copysimulation MySimulation

#'''copysimulation.bat content'''
#Input argument %1 stands for simulation name
@echo off
set COPYHOME=C:\Program Files\2gif
xcopy %1\*.* %1_copy /E /EXCLUDE:%COPYHOME%\exclui.txt
perl %COPYHOME%/replace.pl 's/%2/\.\.\/\.\./g' *
perl %COPYHOME%/replace.pl 's/\\/\//g' *
@echo on

#'''exclui.txt content'''
.hdf5
.srh
.bmp
.fin
.srw
.ppt
.jpg
.gif
.pdf
.ps
.eps

===Remove all openmp directives from the code===
''NOTE: cygwin or [http://sourceforge.net/projects/getgnuwin32/files/ gnuwin32] with all the gnu tools executables must be installed and accessible from the path command line.''
$ for /F %i in ('dir /B /S *.F90') do @cat %i | grep -v !$OMP > %~ni.tpp
$ for /F %i in ('dir /B /S *.tpp') do @copy %i %~ni.F90
$ for /F %i in ('dir /B /S *.tpp') do @del %i

=== Appending hourly data files from Instituto Hidrográfico ===
for /F %i in ('dir /B *') DO @type %i | grep MCAS >> one-file.txt

=== Duplicating a Run in a MOHID Simulation ===
This batch file duplicates a run with a new number (and updates the Nomfich files correspondingly). It requires a '''CMD /V''' console calling and also the gnu utility [[Sed]].
@echo off
REM DUPLICATE_RUN.BAT
REM ATTENTION: Must be run with the CMD /V option!
REM ARG1 %1 SOURCE RUN ID
REM ARG2 %2 TARGET RUN ID

REM Duplicates the filenames
for /F "delims=*" %%i in ('dir /S /B *_%1.dat') do (
set NAME=%%i
@echo Created !NAME:%1=%2!
copy /Y "!NAME!" "!NAME:%1=%2!"
)

REM Updates the nomfich_N.dat files
for /F %%i in ('dir /S /B Nomfich_%2.dat') do (
sed -e "s/%1/%2/g" %%i > %%i.bak
move /Y %%i.bak %%i
)

=== Set a run number ===
echo off
REM Set_Run.bat
REM ATTENTION: Must be run with the CMD /V option!
REM ARG1 %1 SOURCE RUN ID

REM Activate the chosen run
for /F %%i in ('dir ..\*Nomfich.dat /S /B ') do (
set MYDIR=%%~di%%~pi
copy /Y !MYDIR:~0,-4!data\Nomfich_%1.dat %%i
)

===Finding error in revisions===
REM Requires linux commands grep, cut and tee to be installed as well as the svn command-line client
SET PATH=%PATH%;C:\Program Files\SlikSvn\bin
SET SOURCESVN=https://mohid.svn.codeplex.com/svn
SET TARGETP=E:\Projects\MOHID\test3
SET DEVENV="c:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\devenv"
SET NUMERICS=%TARGETP%\Solutions\VisualStudio2008_IntelFortran11\MOHIDNumerics
REM Uncomment this line only for the first time you run this batch in your computer.
REM svn co %SOURCESVN% %TARGETP%

svn log %SOURCESVN% > codeplex.log
type codeplex.log | grep ^r[0-9][0-9][0-9] | cut -f 1 -d "|" > revisions.log

REM Check if argument is passed. If not then read it from revisions.log file
IF %1.==. (SET /P REVIS=<revisions.log) ELSE (SET REVIS=%1)
SET REVIS=!REVIS:~1!

echo "" > runnedRevisions.log
echo "" > svnupdate.log
echo "" > vs_clean_rebuild.log
echo "" > mohid_run.log
FOR /F %%i in (revisions.log) DO (
set NUM=%%i
set NUM=!NUM:~1!
echo %%i >> runnedRevisions.log
svn update -%%i %TARGETP% | tee -a svnupdate.log
%DEVENV% "%NUMERICS%\MOHIDNumerics.sln" /clean "Release Double|x64" /project MOHIDWater | tee -a vs_clean_rebuild.log
%DEVENV% "%NUMERICS%\MOHIDNumerics.sln" /rebuild "Release Double|x64" /project MOHIDWater | tee -a vs_clean_rebuild.log
echo %%i >> mohid_run.log
"%NUMERICS%\MOHIDWater\x64\Release Double\MOHIDWater_x64_release_double.exe" | tee -a mohid_run.log
)

==External References==
*[http://www.robvanderwoude.com/ntfor.html Batch files tutorial];
*[http://www.ss64.com/nt/for.html for command reference];
*[http://www.ss64.com/nt/ windows nt command-line reference];
*[http://sourceforge.net/projects/getgnuwin32/files/ gnuwin32 download]

[[Category:Windows]]
[[Category:Script]]