Below are personal memo about the book, Teradata Aster BASICS.
Chapter 1
Four key characteristics of Big Data?
Complexity, Variety, Velocity, Volume
Chapter 2
During Partition Splitting (Adding v-Workers), Aster Database is unavailable until the process is completed
Adding Worker Nodes (More processing power per v-Worker)
Adding v-Workers(Partition Splitting) More parallelism across the system
Queen node be RAID5
Worker and Loader be RAID0 for small configurations
Worker and Loader be RAID5 for large configurations
Chapter 3
What is QueryGrid?
is a client-based user interface that leverages the updates
manages optimization so that each platform does what it does best when resolving the query request
Chapter 5
MVCC: The result is that over time, the table can contain logically deleted (invisible) rows that are no longer used, but are consuming table space
Chapter 6
Multi-structured data: consists of files that contain a wide variety of different formats and data types in a non-fixed manner that must be parsed interpreted properly
Chapter 8
Map/Row function must implement the operateOnSomeRows method
Reduce/Partition function must implement the operateOnPartitionmethod
Chapter 10
Rows returned in the RESULT operator are always?
Aggregations