Earning Points. Starwood's Preferred Guest program is fairly straightforward: the more nights you spend at participating hotels, the faster you'll earn a free night.
As seen in the EXECUTING phase, the map will write (using Mapper.Context.write()) its output into a circular in-memory buffer (MapTask.MapOutputBuffer). The size of this buffer is fixed and determined by the configuration parameter mapreduce.task.io.sort.mb (default: 100MB).
Navigation system, updating and care. Contents of the main unit All map information is stored on the main unit's hard drive. There is no DVD in the unit when it is delivered. The DVDs are used for any updates to system or map information, see the instructions of the DVD's cover.