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.
What is mapper folder used for? Dev the linux documentation project. What do the device files in dev actually do? Unix & linux stack understanding what is mem? Super user. The most dev zero is an example of a 'special file' particularly, 'device node' some these have man pages (in section 4; Leave out the final digit(s) and in few cases such as sda letter). The dev directory the linux documentation project.