Java File IO vs Local database

Question

I am working on a project that involves parsing through a LARGE amount of data rapidly. Currently this data is on disk and broken down into a directory hierarchy:

Answer 1

The issue could be solved both ways but it depends on few factors

go for FileIO.

1. if the volume is < millons of rows
2. if your dont do a complicated query like Jon Skeet said
3. if your referance for fetching the row is by using hte Folder Name: "DataSource" as the key

go for DB

1. if you see your program reading through millions of records
2. you can do complicated selection, even multiple rows using a single select.
3. if you have knowledge of creating a basic table structure for DB