With wordpress it is always advisable to backup your database, and not just rely on your hosting company to have a backup.
However, I have had experience where for some reason uploading database doesn’t work quite as it should.
As a triple back up, you can export your blog as an XML file. This offers a second way to back up all your posts, categories, tags and images. Also, with an XML file, you can easily import to another blogging platform. Whearas with just a database, you’re stuck with wordpress.
It is very easy to get an XML file, just go to tools and export.
Vasudeva Server has various backup policies. But, there is no harm in getting your own XML backup.