What eDiscovery options are available on top of Glacier? Enterprise organizations often require eDiscovery. Or, must all information conforming a specific time period or meta-data be first transferred out of Glacier?

Seems like Glacier provides little meta-data, or even timestamps. The client is responsible for maintaining archive meta-data and linking the meta-data to retrieval systems: “Amazon Glacier does not support any additional metadata for the archives. The archive ID is an opaque sequence of characters from which you cannot infer any meaning about the archive. So you might maintain metadata about the archives on the client-side. “