Hadoop: The Definitive Guide - Cdn.oreilly.com
Hadoop: The Definitive Guide - Cdn.oreilly.com
Hadoop: The Definitive Guide - Cdn.oreilly.com
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Parallelism 409<br />
Parameter Substitution 410<br />
12. Hive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413<br />
Installing Hive 414<br />
<strong>The</strong> Hive Shell 415<br />
An Example 416<br />
Running Hive 417<br />
Configuring Hive 417<br />
Hive Services 419<br />
<strong>The</strong> Metastore 421<br />
Comparison with Traditional Databases 423<br />
Schema on Read Versus Schema on Write 423<br />
Updates, Transactions, and Indexes 424<br />
HiveQL 425<br />
Data Types 426<br />
Operators and Functions 428<br />
Tables 429<br />
Managed Tables and External Tables 429<br />
Partitions and Buckets 431<br />
Storage Formats 435<br />
Importing Data 441<br />
Altering Tables 443<br />
Dropping Tables 443<br />
Querying Data 444<br />
Sorting and Aggregating 444<br />
MapReduce Scripts 445<br />
Joins 446<br />
Subqueries 449<br />
Views 450<br />
User-Defined Functions 451<br />
Writing a UDF 452<br />
Writing a UDAF 454<br />
13. HBase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459<br />
HBasics 459<br />
Backdrop 460<br />
Concepts 460<br />
Whirlwind Tour of the Data Model 460<br />
Implementation 461<br />
Installation 464<br />
Test Drive 465<br />
Clients 467<br />
Table of Contents | xi
Change language