It would be nice to be able to utilize more than one dbpath. This is for ease of expansion, but also for optimization where we want to put indexes on SSD. Each collection, and index should be able to be placed into a specific dbpath

dbpath=[/mount1, /mount2, /mount3]

• We should be able to add a new dbpath entry on a running DB.
• Allow for objects to be allocated to a specific datadir (collection creation, index creation, capped collection creation, gridFS)

These options allow for flexible growth because OPS folks can add more storage and allow MongoDB to keep growing without interruption. This is also great for putting indexes on fast storage like SSD's.