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.
The mapper output (intermediate data) is stored on the Local file system (NOT HDFS) of each individual mapper nodes. This is typically a temporary directory location which can be setup in config by the hadoop administrator. The intermediate data is cleaned up after the Hadoop Job completes.
JPA 2.0 allows for a Map where the key is not part of the target object to be persisted. The Map key can be any of the following: 1  A Basic value, stored in the target's table or join table. 2  An Embedded object, stored in the target's table or join table.