Some idea of how to upload images in a slider with Ajax jQuery making several requests to the Database (I'm going to use the .Net Web API and the requests to the database will be done every 2 minutes) when at the same time from another client are uploading other images to the same BD .. I would like to know of some algorithm that shows a number of times "just" the images in the slider taking into account the interval of 2 minutes of the request and that does not always start from the same Images like this show the latest uploads.