An area on your arm will be cleaned, and a sterile needle put into a vein (usually where your elbow bends). Removing a unit of whole blood usually takes about 10 to 15 minutes. Apheresis donation (described in the next section called â Types of donation â) may take 2 hours or longer.
Hadoop is a distributed computing (E.g. MapReduce) and storage (HDFS) framework. Hive is part of the hadoop ecosystem and provides an sql-like interface to hadoop. Redshift is a proprietary database system by Amazon. It's functionality is comparable with Hive on top of Hadoop: but lacking lots of options.
The list includes the HBase database, the Apache Mahout machine learning system, and the Apache Hive Data Warehouse system. Hadoop can in theory be used for any sort of work that is batch-oriented rather than real-time, is very data-intensive, and benefits from parallel processing of data.