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.
Before we get started letâs take a look at how Pig and Hive data models differ. In the case of Pig all data objects exist and are operated on in the script. Once the script is complete all data objects are deleted unless you stored them. In the case of Hive we are operating on the Apache Hadoop data store. Any query you make, table that you create, data that you copy persists from query to query. You can think of Hive as providing a data workbench where you can examine, modify and manipulate the data in Apache Hadoop.