Release 3.1.0 of ELS adds the Hint Status Tracker and a new mode - the Hint Status Server (HSS). The Tracker coordinates hint completion status locally. The Server tracks hint completion status for remote operations. These are needed when two or more back-ups are being used with hints.
A few bugs were fixed and command-line options added. Note the -h option has been repurposed.
See the Release Notes for details.