Aster Basic Book
I read Aster Basic Book for the exam. It is easy to read and covers most of the basic.
Below are personal memo about the book.
Four key characteristics of Big Data?
Complexity, Variety, Velocity, Volume
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
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
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
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
Map/Row function must implement the
Reduce/Partition function must implement the
Rows returned in the RESULT operator are always?