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As shown in the diagram, the general layout of a _payu_-supported model run consists of two main directories:
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# --8<-- [end:organisation_generic]
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# --8<-- [start:organisation_control]
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- The _control_ directory contains the model configuration and is the directory from which the model run is started. The `control` directory is a git repository where experiments are stored as branches, allowing the same _control_ directory to be used for multiple experiments. For more information, refer to [this payu tutorial](https://forum.access-hive.org.au/t/access-om2-payu-tutorial/1750#select-experiment-12). {: #control-directory }
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- The _laboratory_ directory contains all data from _payu_ experiments of the same model. By default, it is `/scratch/$PROJECT/$USER/<model_name>`. `$PROJECT` and `$USER` are environment variables on _Gadi_ that points to your [default project](/getting_started/set_up_nci_account/#change-default-project-on-gadi) and your username respectively. See the section on [modifying the PBS resources](#modify-pbs-resources) to learn how to change the _laboratory_ location.
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# --8<-- [end:organisation_control]
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# --8<-- [start:organisation_lab]
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- The _laboratory_ directory contains all data from _payu_ experiments of the same model. By default, it is `/scratch/$PROJECT/$USER/<model_name>`. `$PROJECT` and `$USER` are environment variables on _Gadi_ that points to your [default project](/getting_started/set_up_nci_account/#change-default-project-on-gadi) and your username respectively.
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# --8<-- [end:organisation_lab]
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See the section on [modifying the PBS resources](#modify-pbs-resources) to learn how to change the _laboratory_ location.
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# --8<-- [start:organisation_suite]
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On _Gadi_, it is good practice to put experiment _control_ directories in your `$HOME` directory as this is the only filesystem that is actively backed-up. There is a 10GB limit for home directories, but the _control_ directory only contains text files and symlinks, and so uses relatively little space (<1MB). The _laboratory_ directory is on `/scratch` which is optimised for fast I/O for large data and where there is adequate space available for large model output.
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Inside the _laboratory_ directory, there are two subdirectories of particular interest:
@@ -81,7 +87,7 @@ The _archive_ and _work_ directories for an experiment are most easily accessed
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!!! warning
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Files on the `/scratch` drive, such as the _laboratory_ directory, might be deleted if not accessed for 90 days. All experiments which are to be kept should be moved to `/g/data/` by enabling the automated `sync` step in _payu_. For further information, refer to [Syncing output data](#syncing-output-data-to-long-term-storage).
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