Lomatia is a storage manager for the AIP and DIP store of the Kentucky Digital Library. It is used to move AIPs and DIPs across various storage nodes to prevent any particular node from getting too full. It is policy-agnostic and is intended to be directed by higher-level tools to manage the nodes. In return, Lomatia allows the higher-level tools to ignore some of the low-level details of the storage nodes.
In particular, Lomatia provides the following commands:
replant --path <pairtree_path> --source <source> --target <target>
This command determines whether its path argument is the root of a BagIt bag or just a directory, and enqueues an appropriate worker into a job queue to handle the move later.
The bag handler rsyncs the given bag from one storage node to another, moves the original out of the way, creates a symlink to the new copy, and finally deletes the original bag.
The path handler runs the command replant on each of the
path's children, using the same <source> and <target>
arguments as it received.
check_fixity --log <log_file> --path <pairtree_path> --node <node>
This command runs a BagIt validity check on each bag in the indicated part of the tree, logging the results in a log file.
This software is still in development and is closely tied to a particular institution's needs. I'm offering it under the MIT license in case you find anything in it useful, but I don't expect to scratch any universal itches with this program.