Major Description
Provide a way to partition data directories into multiple "bucket" directories. For example, instead of creating 10,000 data directories inside one base data directory, Solr can assign a core to one of 4 base directories, thereby distributing them.
The underlying problem is that with large number of indexes, we see slower and slower system performance as one goes on increasing the number of cores, thereby increasing the number of directories in the single data directory.
