OLAP

Zone Maps: Netezza’s Answer to Indexes in Big Data

There are no indexes in Netezza. This is an intentional design choice. Indexes are effective in an OLTP system, where transactions affect a single row or two, but not in an OLAP system, where transactions affect large sets of data. Netezza is designed to be a fully OLAP-focused system, in both hardware and software, and indexes did not meet that goal. (more…)