TwoStore comes packaged with a utility to split an FSBlobStore into two. The purpose of this tool is to allow you to migrate a storage configuration into a new configuration with one of the leaf nodes of your store-tree made into a parent node with the two new FSBlobStores as children. This allows you to insert a TwoStore above them and thus expand your tree.
Execute it with
java -jar target/TwoStore-1.0-jar-with-dependencies.jar
and the following parameters:
-h,--help Get this help
-l,--left <arg> Left-hand output BlobStore filepath (required)
-o,--original <arg> Original (input) BlobStore filepath (required)
-r,--right <arg> Right-hand output BlobStore filepath (required)
This utility does not write to the original FSBlobStores, so it may be used while a repository is in operation. Of course, switching to the new configuration will require a repository restart.