Impala Doc Reorg - January 2014

When Impala started, many of the early adopters were experts in HiveQL, so the Impala documentation assumed some familiarity with Hive SQL syntax and behavior. The Impala SQL reference info was relatively low-volume, more of a quick reference. Now there's more functionality to talk about, and more users are starting with Impala straight from an RDBMS background and need the full details from the ground up. So the Impala docs are reorganized a little, to set the stage for further expansion. No pages are going away, so you won't get any 404 errors. Large pages (particularly in the SQL reference and Security areas) are being split up, making the navigation tree in the left sidebar more useful for jumping between related subtopics. Here's the current layout, with bold indicating topics that were recently split out into their own separate pages:

• Cloudera Impala Release Notes
  • New Features in Impala
  • Incompatible Changes
  • Known Issues and Workarounds in Impala
• Installing and Using Cloudera Impala
  • Impala Concepts and Architecture
  • Installing Impala
    • Cloudera Impala Requirements
    • Installing Impala with Cloudera Manager
    • Installing Impala without Cloudera Manager
  • Configuring Impala
    • Post-Installation Configuration for Impala
    • Configuring Impala to Work with ODBC
    • Configuring Impala to Work with JDBC
  • Upgrading Impala
  • Starting Impala
    • Modifying Impala Startup Options
  • Impala Tutorial
  • Administering Impala / Impala Administration
  • Impala Security
    • Enabling Sentry Authorization with Impala
    • Enabling Kerberos Authentication for Impala
    • LDAP Authentication
    • Auditing Impala Operations
  • Impala SQL Language Reference
    • Comments
    • Impala Data Types
    • Literals
    • SQL Operators
    • Schema Objects and Object Names
    • SQL Statements
    • Built-in Functions
    • Aggregate Functions
    • User-Defined Functions
    • SQL Differences Between Impala and Hive
  • Using the Impala Shell
    • impala-shell Command-Line Options
    • Connecting to impalad
    • Running Commands
    • impala-shell Command Reference
    • Query Options for the SET Command
  • Tuning Impala for Performance
    • Understanding Impala Query Performance
  • Partitioning
  • How Impala Works with Hadoop File Formats
    • Using Text Data Files with Impala Tables
    • Using the Parquet File Format with Impala Tables
    • Using the Avro File Format with Impala Tables
    • Using the RCFile File Format with Impala Tables
    • Using the SequenceFile File Format with Impala Tables
  • Using Impala to Query HBase Tables
  • Using Impala Logging
  • Appendix A - Ports Used by Impala
  • Appendix B - Troubleshooting Impala
  • Appendix C - Impala Reserved Words
• Cloudera Impala Version and Download Information
• Cloudera Impala Frequently Asked Questions