DQ2 is queried to obtain the the numbers of files registered for each dataset and a simple check is done to verify that the registered GUID and logical names appear to be correct.
Follow the above links to see tables giving information about the jobs or files associated with tasks or datasets. Each of those pages provides an input box where users can provide a wildcard pattern (e.g. *AOD*) to filter the list using the task or dataset name.
The start and stop times posted at the top of this page indicate when the data was collected.
For datasets at selected sites (only BNL at present), the local replica catalog is queried to check if files are present at the site.