Index management and rollover

I have setup ILM and everything was going good until the index didn't roll over like I thought it would. I have it set to 30Gbs or 60 days. My first question is do both requirements have to be met before it will roll over or just one? If it is only one requirement how do I figure out why it isn't rolling over?

Thanks in advance

Are there logs for ILM to see what is going with the rollover?

Thanks

Does anyone have any thoughts?