https://community.hortonworks.com/questions/82148/actual-use-of-fsimage-and-edits-log.html , Now if the a.txt was changed to b.txt and during the same time a checkpoint occurred and a new fsimage with the information of b.txt exists, by this time the editlogs are truncated and now you dont do any change. So this would mean that the new fsimage has info for b.txt(but this is not in the NN memory as of now, the NN continues to have a.txt in the fsimage it has loaded in the start) but the editlog has no information about it now. So how would the NN recognize this file ? ... View more