An ediscovery system filters a document corpus to identify a filtered document set. The filtered document set is further analyzed to identify a production document set. Documents of the document corpus are stored in one of online storage and nearline storage, nearline storage providing slower access times. Documents added to the production set and/or filtered document set are moved to online storage if not already present. A countdown is associated with each document in the online storage and the document is moved to nearline storage on expiration of the counter. For each document moved, a placeholder file is retained in online storage that includes searchable text of the document. Documents in the production set may have a countdown that is longer for documents in the filtered document set. Documents in the filtered document set may have a countdown that is longer than remaining documents in the document corpus.