Filesystem storage of BLOBs for Kotti.

Find out more about BLOB storage in Kotti

You only need to add an option to tell Kotti to use the kotti_filestore add-on and to configure the location where the BLOBs will be stored on the filesystem. The line in your [app:main] (or [app:kotti], depending on how you setup Fanstatic) section could then look like this:

kotti.blobstore = kotti_filestore.filestore://%(here)s/filestore

The kotti_filestore.filestore part will cause Kotti to delegate the storage of BLOBs to this class. The %(here)s/filestore is an example configuration for the storage which will cause all BLOBs to be stored in a directory named filestore which will be automatically created in the same directory where your config file resides.

Currently a single configuration option exists. The absolute path of the directory where kotti_filestore stores the BLOBs can be specified with the path segment of the configuration URL.

To overcome limitations w.r.t. the maximum number of files within a directory on some filesystems, kotti_filestore generates a directory tree with a depth of 16, where each directory has a maximum of 256 children (either subdirectories or files).

• kotti_filestore tries to be fully transaction aware.

  It does so by using repoze.filesafe for filesystem operation on files. Unfortunately repoze.filesafe doesn't provide functions for directories. That's why kotti_filestore may leave some empty directories on your filesystem. Files are removed properly on deletion of the corresponding content items though.

  As a workaround you are encouraged to setup a cronjob that scans for empty directories periodically and removes them.