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.
Bottom line: 2GB for dual monitor, 4GB for more than 2 monitors. Find the best GPU chipset from benchmark test sites. To answer what is the role of memory, it is where all your vertex (geometry), terrain, mesh , texture data of your game is stored and GPU does computations on that. If there isn't enough space in GPU memory modern GPUs are capable of juggling data between VRAM (a dedicated memory portion of CPU RAM) and GPU RAM.