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).
SQL Data Warehouse supports these sharding patterns: Hash; Round Robin; Replicate; Control node. The Control node is the brain of the data warehouse. It is the front end that interacts with all applications and connections. The MPP engine runs on the Control node to optimize and coordinate parallel queries. When you submit a T-SQL query to SQL Data Warehouse, the Control node transforms it into queries that run against each distribution in parallel. Compute nodes