Difference between revisions of "Obtaining a GCHP Run Directory"

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<span style="color:crimson;font-size:120%">'''The GCHP documentation has moved to https://gchp.readthedocs.io/.''' The GCHP documentation on http://wiki.seas.harvard.edu/ will stay online for several months, but it is outdated and no longer active!</span>
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__FORCETOC__
 
__FORCETOC__
'''''[[Downloading_GCHP|Previous]] | [[Setting_Up_the_GCHP_Environment|Next]] | [[Getting Started With GCHP]] | [[GCHP Main Page]]'''''
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'''''[[Compiling_GCHP|Previous]] | [[Running_GCHP:_Basics|Next]] | [[Getting Started with GCHP]] | [[GCHP Main Page]]'''''
 
#[[GCHP_Hardware_and_Software_Requirements|Hardware and Software Requirements]]
 
#[[GCHP_Hardware_and_Software_Requirements|Hardware and Software Requirements]]
#[[Downloading_GCHP|Downloading Source Code and Data Directories]]
 
#<span style="color:blue">'''Obtaining a Run Directory'''</span>
 
 
#[[Setting_Up_the_GCHP_Environment|Setting Up the GCHP Environment]]
 
#[[Setting_Up_the_GCHP_Environment|Setting Up the GCHP Environment]]
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#[[Downloading_GCHP|Downloading Source Code and Data Directories]]
 
#[[Compiling_GCHP|Compiling]]
 
#[[Compiling_GCHP|Compiling]]
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#<span style="color:blue">'''Obtaining a Run Directory'''</span>
 
#[[Running_GCHP:_Basics|Running GCHP: Basics]]
 
#[[Running_GCHP:_Basics|Running GCHP: Basics]]
 
#[[Running_GCHP:_Configuration|Running GCHP: Configuration]]
 
#[[Running_GCHP:_Configuration|Running GCHP: Configuration]]
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<br>
 
<br>
  
== Overview ==
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==Create Run Directory==
  
Starting in version 12.1.0, GCHP no longer uses the Unit Tester to create run directories. Instead, create run directories directly from the GCHP source code repository. If you are uncertain about what version you have, please contact the GEOS-Chem Support Team. Please note that we always recommend upgrading to the latest version.
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GCHP run directories are created from within the source code. A new run directory should be created for each different version of GEOS-Chem you use. Git version information is logged to file <code>rundir.version</code> within the run directory upon creation.
  
==Step 1: Create Run Directory==
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To create a run directory, navigate to the <code>run/</code> subdirectory of the source code and execute shell script <code>createRunDir.sh</code>.
  
Navigate to GCHP subdirectory <code>Run/</code> and run shell script <code>createRunDir.sh</code>.  
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$ cd ~/GCHPctm/run
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$ ./createRunDir.sh
  
./createRunDir.sh
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During the course of script execution you will be asked a series of questions:
  
You can pass a run directory name as an optional argument if you wish, or you can set it interactively later on.
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==== Enter ExtData directory path ====
  
./createRunDir.sh gchp_12.1.0_RnPbBe
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The first time you create a GCHP run directory on your system you will be prompted for a path to GEOS-Chem shared data directories. The path should include the name of your <code>ExtData</code> directory and should not contain symbolic links. The path you enter will be stored in file <code>.geoschem/config</code> in your home directory as environment variable <code>GC_DATA_ROOT</code>. If that file does not already exist it will be created for you. When creating additional run directories you will only be prompted again if the file is missing or if the path within it is not valid.
  
During the course of script execution you will be asked a series of questions:
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-----------------------------------------------------------
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Enter path for ExtData:
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-----------------------------------------------------------
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====Choose simulation type====
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Enter the integer number that is next to the simulation type you want to use.
  
===ExtData path===
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-----------------------------------------------------------
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Choose simulation type:
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-----------------------------------------------------------
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  1. Full chemistry
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  2. TransportTracers
  
The very first time you create a run directory you will be prompted for your ExtData path where you store GEOS-Chem shared data directories. The ExtData path should include the name of your ExtData directory. For example, it may be something like this: <code>/n/lfs/gcgrid/gcdata/ExtData</code>. It is a good idea to have this ready prior to creating your first run directory. Make sure you do not include any symbolic links in the path. Once entered, it will be stored in file <code>.geoschem/config</code> in your home directory as environment variable <code>GC_DATA_ROOT</code>. If that file does not already exist it will be created for you. Please note that since the directory it is stored in begins with a period it will be invisible unless you show hidden files using a command such as <code>ls -a</code>.  
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If creating a full chemistry run directory you will be given additional options. Enter the integer number that is next to the simulation option you want to run.
  
'''NOTE:''' Subsequent runs of <tt>createRunDir.sh</tt> will always source that file to get your location for shared data directories and you will not be prompted again. If your ExtData path changes in the future you must provide the new path in <tt>.geoschem/config</tt>. The run directory creation script will prompt you to do so only if the file is missing or if the path within it is not valid.
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-----------------------------------------------------------
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Choose additional simulation option:
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-----------------------------------------------------------
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  1. Standard
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  2. Benchmark
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  3. Complex SOA
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  4. Marine POA
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  5. Acid uptake on dust
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  6. TOMAS
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  7. APM
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  8. RRTMG
  
===Simulation type===
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====Choose meteorology source====
  
You will next be prompted for what simulation you wish to create a run directory for. Enter the integer number next to the simulation type you want to use that is displayed on the screen.
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Enter the integer number that is next to the input meteorology source you would like to use.
  
===Meteorology source===
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-----------------------------------------------------------
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Choose meteorology source:
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-----------------------------------------------------------
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  1. MERRA2 (Recommended)
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  2. GEOS-FP
  
Following simulation type, enter the meteorology you want to use in the same way. Options for GEOS-FP and MERRA2 will be displayed.
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====Enter run directory path====
  
===Storage location===
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Enter the target path where the run directory will be stored. You will be prompted to enter a new path if the one you enter does not exist.
  
Next, enter the target path where you want your run directory to be stored. Do not include symbolic links in the path.
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-----------------------------------------------------------
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Enter path where the run directory will be created:
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-----------------------------------------------------------
  
===Run directory name===
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====Enter run directory name====
  
You will then be prompted to enter a run directory name if you did not pass one as an optional argument when calling the script. You are given the option to simply press return and use the default run directory name of format <tt>gchp_{simulation_type}</tt>. If you are not storing your run directory at a path that indicates GEOS-Chem version, we recommend storing the version number directly in the run directory name to avoid later confusion. However, please note that you can always look up the run directory version within the run directory itself in file <tt>rundir.version</tt>.
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Enter the run directory name, or accept the default. You will be prompted for a new name if a run directory of the same name already exists at the target path.
  
===Run directory version control===
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-----------------------------------------------------------
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Enter run directory name, or press return to use default:
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-----------------------------------------------------------
  
Finally, you will be asked if you want to track run directory changes with git version control. This feature is useful if you plan on making feature updates to GEOS-Chem that involve changes to the run directory, such as adding emissions. With version control you can keep track of exactly what you changed relative to the original settings. This is also useful if you plan on submitting an update for inclusion in the standard model since you can copy changes directly from your version history to <tt>GCHP/Run</tt>, and then commit those changes in the same clone as your source code updates. If you forked the repository you can then push to your fork and do a pull request to send us your updates.
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====Put run directory under version control (optional)====
  
== Step 2: Set Environment File Symbolic Link ==
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Enter whether you would like your run directory tracked with git version control. With version control you can keep track of exactly what you changed relative to the original settings. This is useful for trouble-shooting as well as tracking run directory feature changes you wish to migrate back to the standard model.
  
Once you have created a run directory you need to set the <tt>gchp.env</tt> symbolic link to your GCHP environment file. This file will be sourced automatically every time you compile using the Makefile and every time you run using one of the provided run scripts (more on this later in the manual). If you write your own run script, be sure to include <tt>source gchp.env</tt> to use the same environment that you compiled with.
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Do you want to track run directory changes with git? (y/n)
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-----------------------------------------------------------
  
To set the <tt>gchp.env</tt> symbolic link execute shell script <tt>setEnvironment</tt> and pass the path to your environment file. You can keep your environment file anywhere on your system; it does not need to be stored in the run directory.
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== Set Environment ==
  
./setEnvironment /home/gchp/envs/gchp_ifort17_openmpi.env
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Set the <code>gchp.env</code> symbolic link to the same GCHP environment file you used for building the executable. This generically named symbolic link exists for convenience for inclusion in reusable scripts to automate build and run. To set it, use shell script <code>setEnvironment</code>.
  
Several examples of GCHP environment files are provided in subdirectory <tt>environmentFileSamples</tt>. For more information on developing a working environment file for GCHP see the next chapter in this online manual.
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cd /home/gchp_fullchem
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./setEnvironment /home/envs/gchp_ifort19_openmpi4.env
  
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'''Tips:'''
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*You can keep your environment file anywhere on your system for reuse across multiple run directories.
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*Always source <code>gchp.env</code> prior to building and running GCHP. It is included by default in all example run scripts.
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*Check CMake file <tt>CMakeCache.txt</tt> when in doubt about what environment was used to build the executable.
  
 
--------------------------------------
 
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'''''[[Downloading_GCHP|Previous]] | [[Setting_Up_the_GCHP_Environment|Next]] | [[Getting Started With GCHP]] | [[GCHP Main Page]]'''''
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'''''[[Compiling_GCHP|Previous]] | [[Running_GCHP:_Basics|Next]] | [[Getting Started with GCHP]] | [[GCHP Main Page]]'''''

Latest revision as of 15:40, 8 December 2020


The GCHP documentation has moved to https://gchp.readthedocs.io/. The GCHP documentation on http://wiki.seas.harvard.edu/ will stay online for several months, but it is outdated and no longer active!



Previous | Next | Getting Started with GCHP | GCHP Main Page

  1. Hardware and Software Requirements
  2. Setting Up the GCHP Environment
  3. Downloading Source Code and Data Directories
  4. Compiling
  5. Obtaining a Run Directory
  6. Running GCHP: Basics
  7. Running GCHP: Configuration
  8. Output Data
  9. Developing GCHP
  10. Run Configuration Files


Create Run Directory

GCHP run directories are created from within the source code. A new run directory should be created for each different version of GEOS-Chem you use. Git version information is logged to file rundir.version within the run directory upon creation.

To create a run directory, navigate to the run/ subdirectory of the source code and execute shell script createRunDir.sh.

$ cd ~/GCHPctm/run
$ ./createRunDir.sh

During the course of script execution you will be asked a series of questions:

Enter ExtData directory path

The first time you create a GCHP run directory on your system you will be prompted for a path to GEOS-Chem shared data directories. The path should include the name of your ExtData directory and should not contain symbolic links. The path you enter will be stored in file .geoschem/config in your home directory as environment variable GC_DATA_ROOT. If that file does not already exist it will be created for you. When creating additional run directories you will only be prompted again if the file is missing or if the path within it is not valid.

-----------------------------------------------------------
Enter path for ExtData:
-----------------------------------------------------------

Choose simulation type

Enter the integer number that is next to the simulation type you want to use.

-----------------------------------------------------------
Choose simulation type:
-----------------------------------------------------------
  1. Full chemistry
  2. TransportTracers

If creating a full chemistry run directory you will be given additional options. Enter the integer number that is next to the simulation option you want to run.

-----------------------------------------------------------
Choose additional simulation option:
-----------------------------------------------------------
 1. Standard
 2. Benchmark
 3. Complex SOA
 4. Marine POA
 5. Acid uptake on dust
 6. TOMAS
 7. APM
 8. RRTMG

Choose meteorology source

Enter the integer number that is next to the input meteorology source you would like to use.

-----------------------------------------------------------
Choose meteorology source:
-----------------------------------------------------------
 1. MERRA2 (Recommended)
 2. GEOS-FP

Enter run directory path

Enter the target path where the run directory will be stored. You will be prompted to enter a new path if the one you enter does not exist.

-----------------------------------------------------------
Enter path where the run directory will be created:
-----------------------------------------------------------

Enter run directory name

Enter the run directory name, or accept the default. You will be prompted for a new name if a run directory of the same name already exists at the target path.

-----------------------------------------------------------
Enter run directory name, or press return to use default:
-----------------------------------------------------------

Put run directory under version control (optional)

Enter whether you would like your run directory tracked with git version control. With version control you can keep track of exactly what you changed relative to the original settings. This is useful for trouble-shooting as well as tracking run directory feature changes you wish to migrate back to the standard model.

-----------------------------------------------------------
Do you want to track run directory changes with git? (y/n)
-----------------------------------------------------------

Set Environment

Set the gchp.env symbolic link to the same GCHP environment file you used for building the executable. This generically named symbolic link exists for convenience for inclusion in reusable scripts to automate build and run. To set it, use shell script setEnvironment.

cd /home/gchp_fullchem
./setEnvironment /home/envs/gchp_ifort19_openmpi4.env

Tips:

  • You can keep your environment file anywhere on your system for reuse across multiple run directories.
  • Always source gchp.env prior to building and running GCHP. It is included by default in all example run scripts.
  • Check CMake file CMakeCache.txt when in doubt about what environment was used to build the executable.

Previous | Next | Getting Started with GCHP | GCHP Main Page