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Manages data storage for CKAN/DCOR (import, symlink, etc.)

Project description

This plugin manages how data are stored in DCOR. There are two types of files in DCOR:

  1. Resources uploaded by users, imported from figshare, or imported from a data archive
  2. Ancillary files that are generated upon resource creation, such as condensed DC data, preview images (see ckanext-dc_view).

This plugin implements:

  • Data storage management. All resources uploaded by a user are moved to /data/users-HOSTNAME/USERNAME-ORGNAME/PK/ID/PKGNAME_RESID_RESNAME and symlinks are created in /data/ckan-HOSTNAME/resources/RES/OUR/CEID. CKAN itself will not notice this. The idea is to have a filesystem overview about the datasets of each user.

  • Import datasets from figshare. Existing datasets from figshare are downloaded to the /data/depots/figshare directory and, upon resource creation, symlinked there from /data/ckan-HOSTNAME/resources/RES/OUR/CEID (Note that this is an exemption of the data storage management described above). When running the following command, the “figshare-import” organization is created and the datasets listed in figshare_dois.txt are added to CKAN:

    ckan -c /etc/ckan/default/ckan.ini import-figshare
    
  • Import datasets from an internal depot. The depot should be present at data/depots/internal/ and follow the directory structure 201X/2019-08/20/2019-08-20_1126_c083de* where the allowed file names in this case are

    • 2019-08-20_1126_c083de.sha256sums a file containing SHA256 sums
    • 2019-08-20_1126_c083de_v1.rtdc the actual measurement
    • 2019-08-20_1126_c083de_v1_condensed.rtdc the condensed dataset
    • 2019-08-20_1126_c083de_ad1_m001_bg.png an ancillary image
    • 2019-08-20_1126_c083de_ad2_m002_bg.png another ancillary image
    ckan -c /etc/ckan/default/ckan.ini import-internal
    

Please make sure that the necessary file permissions are given in /data.

Installation

pip install ckanext-dcor_depot

Add this extension to the plugins and defaul_views in ckan.ini:

ckan.plugins = [...] dcor_depot
ckan.storage_path=/data/ckan-HOSTNAME
ckanext.dcor_depot.depots_path=/data/depots
ckanext.dcor_depot.users_depot_name=users-HOSTNAME

This plugin stores resources to /data:

mkdir -p /data/depots/users-$(hostname)
chown -R www-data /data/depots/users-$(hostname)

Project details


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