Issue #322 wontfix
No sync operations in filedb
The whoosh filedb support don't include any calls to fsync or fdatasync. So the result of the writes and the rename is undefined if a crash happens and usually results in an empty file.
To properly write data to disk, it needs to:
- Call fdatasync before .close().
- Call fsync after rename on the directory if it cares about the new file to survive.