Personally, I don't use Revel but as it is a new platform for Adobe, you will be better off uploading your photos in batches so that you can keep a track of what is already uploaded and what is not.
For the future, I am assuming you won't have 6,000 photos in one batch again so I would say it should work normally. I guess I should say here that size of the batch matters when using the Cloud platform.
There is a Revel forum as well if you have Revel specific questions.
Hope this helps.
1 person found this helpful
You are right. Because I had to transfer to the new Elements 11, I had so
many photos. Thanks so much!
In a message dated 7/16/2013 7:51:41 P.M. Central Daylight Time,
Re: REVEL - missing files - question
created by mytaxsite.co.uk
(http://forums.adobe.com/people/mytaxsite.co.uk) in Photoshop Elements - View the full discussion
I am glad everything is sorted out for you and good luck for the future.