How much disk space for MongoDB
<p>I am about to setup MongoDB on AWS EC2 (Amazon Linux HVM 64bits) and implement RAID 10.</p>

<p>I am expecting a couple of millions of records for a system of videos on demand.</p>

<p>I could not find any good advice on how much disk space I should use for that instance.</p>

<p>The dilemma is that I can't spend too much on EBS volume right now, but if I have to add a new bigger volume in less than a year and turn the db off to move the data to that new volume, that is a problem.</p>

<p>For the initial stage, I was thinking 16Gb (available after RAID 10 implementation) on a t2.medium, with plan of upgrading to m4.medium and adding replica sets later.
Any thoughts on this?</p>