Difference between revisions of "Conda"
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Revision as of 20:09, 30 June 2022
Conda is an open-source package management system and environment management system that runs on Windows, macOS, and Linux. Conda quickly installs, runs, and updates packages and their dependencies. Conda easily creates, saves, loads, and switches between environments. Separating applications in separate conda environments allows installation of incompatible dependencies - python2 and python3 for example.
Note: For a faster conda see Mamba.
module spider conda to find out what environment modules are available for this application.
- HPC_CONDA_DIR - installation directory
- HPC_CONDA_BIN - executable directory
Note: If you are an active conda user conda package cache can quickly fill up your home directory. We recommend changing the
pkgs_dirs setting in ~/.condarc to point to another filesystem e.g.
pkgs_dirs: - /blue/gators/albert/conda/pkgs
Here is an example ~/.condarc. Change 'GROUP' and USER to the name of your group and username or type the exact path.
channels: - conda-forge - bioconda - defaults envs_dirs: - /blue/GROUP/USER/conda/envs pkgs_dirs: - /blue/GROUP/USER/conda/pkgs auto_activate_base: false auto_update_conda: false always_yes: false show_channel_urls: false
UF Research Computing Applications Team uses conda for many application installs behind the scenes. We are happy to install applications on request for you. However, if you would like to use conda to create multiple environments for your personal projects we encourage you to do so. Here are some recommendations for successful conda use on HiPerGator.
- We suggest not installing your own copy of miniconda or anaconda, but using one of our conda or mamba environment modules (
module load conda) to get the 'conda engine' for free. A personal miniconda3 install will overwrite your ~/.bashrc into your ~/.conda/envs directory, which could fill up your home_quota very fast.
See https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html for the original documentation on managing conda environments.
We recommend using '-p' argument to create environments by 'path', so they wouldn't fill up your home directory (check quota with home_quota). The resulting environment should be located in the project(s) directory tree in /blue for better tracking of installs and better filesystem performance compared to home.
conda create -yp /path/to/the/environment
command instead of 'conda create -n name_of_the_env'
We would also like to point out that there is a clear distinction between using conda environments to install packages and using applications installed in those environments. To use a conda environment you need to add its 'bin' directory to your shell $PATH whether in an interactive session or a job script submitted to the scheduler. To modify a conda environment by installing or removing packages you need to 'activate' the environment. Because of that distinction we strongly recommend against allowing miniconda to insert its activation code into your shell initialization file ~/.bashrc. If you already let it do so please remove the offending code from ~/.bashrc. It's the text within and including the
# >>> conda initialize >>> ... # <<< conda initialize <<<
Instead, load our conda environment module, which we keep up-to-date with conda releases any time you need to create conda environments and to install packages in them. The difference is that 'conda activate' command will not be available, so you will have to use 'source activate' command instead.
$ module load conda $ conda activate /path/to/the/environment
Once you are done installing packages inside the environment you can use
$ conda deactivate
We do not recommend activating conda environments when _using_ them i.e. running programs installed in the environments. Please prepend the path to that environment to your $PATH instead.
E.g. If you have a project-specific conda environment at '/home/myuser/envs/project1/' add the following into your job script before executing any commands