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Cloudera Enterprise 5.8.x | Other versions

Impala GuideSQL ReferenceSQL StatementsSETQuery Options for the SET Statement
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  • Cloudera Introduction
    • CDH Overview
      • Apache Impala Overview
      • Cloudera Search Overview
        • Understanding Cloudera Search
        • Cloudera Search and Other Cloudera Components
        • Cloudera Search Architecture
        • Cloudera Search Tasks and Processes
      • Apache Sentry Overview
      • Apache Spark Overview
      • File Formats and Compression
        • Parquet
        • Avro
        • Data Compression
          • Snappy Compression
      • External Documentation
    • Cloudera Manager 5 Overview
      • Cloudera Manager Admin Console
        • Cloudera Manager Admin Console Home Page
        • Displaying Cloudera Manager Documentation
        • Displaying the Cloudera Manager Server Version and Server Time
        • Automatic Logout
      • EMC DSSD D5 Storage Appliance Integration for Hadoop DataNodes
      • Cloudera Manager API
        • Using the Cloudera Manager API for Cluster Automation
      • Extending Cloudera Manager
      • Cloudera Manager 5 Frequently Asked Questions
    • Cloudera Navigator 2 Overview
      • Cloudera Navigator Data Management Overview
      • Cloudera Navigator 2 Frequently Asked Questions
    • Cloudera Navigator Data Encryption
      • Cloudera Navigator Key Trustee Server Overview
      • Cloudera Navigator Key HSM Overview
      • Cloudera Navigator Encrypt Overview
    • Frequently Asked Questions About Cloudera Software
    • Getting Support
  • Cloudera Release Notes
  • Cloudera QuickStart
    • Cloudera QuickStart VM
      • QuickStart VM Software Versions and Documentation
      • QuickStart VM Administrative Information
    • Cloudera Manager and CDH QuickStart Guide
    • CDH 5 QuickStart Guide
      • Before You Install CDH 5 on a Single Node
      • Installing CDH 5 on a Single Linux Node in Pseudo-distributed Mode
        • MapReduce 2.0 (YARN)
        • Installing CDH 5 with MRv1 on a Single Linux Host in Pseudo-distributed mode
        • Installing CDH 5 with YARN on a Single Linux Host in Pseudo-distributed mode
        • Components That Require Additional Configuration
        • Next Steps After QuickStart
    • Cloudera Search QuickStart Guide
      • Prerequisites for Cloudera Search QuickStart Scenarios
      • Load and Index Data in Search
      • Using Search to Query Loaded Data
  • Installation Guide
    • Installation Requirements for Cloudera Manager, Cloudera Navigator, and CDH 5
      • Cloudera Manager 5 Requirements and Supported Versions
        • Single User Mode Requirements
      • Permission Requirements for Package-based Installations and Upgrades of CDH
      • Cloudera Navigator 2 Requirements and Supported Versions
      • CDH 5 Requirements and Supported Versions
      • Supported Virtualization and Cloud Platforms
      • Cluster Hosts and Role Assignments
      • Ports
        • Ports Used by Cloudera Manager and Cloudera Navigator
        • Ports Used by Cloudera Navigator Encryption
        • Ports Used by Components of CDH 5
        • Ports Used by Impala
        • Ports Used by Cloudera Search
        • Ports Used by DistCp
        • Ports Used by Third-Party Components
        • Ports Used by Apache Flume and Apache Solr
    • Managing Software Installation Using Cloudera Manager
      • Parcels
      • Migrating from Packages to Parcels
      • Migrating from Parcels to Packages
    • Installing Cloudera Manager and CDH
      • Java Development Kit Installation
      • Single User Mode Requirements
      • Cloudera Manager and Managed Service Datastores
        • Embedded PostgreSQL Database
        • External PostgreSQL Database
        • MariaDB Database
        • MySQL Database
        • Oracle Database
        • Configuring an External Database for Oozie
        • Configuring an External Database for Sqoop
        • Backing Up Databases
        • Data Storage for Monitoring Data
        • Storage Space Planning for Cloudera Manager
      • Installation Path A - Automated Installation by Cloudera Manager (Non-Production Mode)
      • Installation Path B - Installation Using Cloudera Manager Parcels or Packages
        • (Optional) Manually Install CDH and Managed Service Packages
      • Installation Path C - Manual Installation Using Cloudera Manager Tarballs
      • Installing Impala
      • Installing Search
      • Installing Spark
      • Installing the GPL Extras Parcel
      • Understanding Custom Installation Solutions
        • Creating and Using a Parcel Repository for Cloudera Manager
        • Creating and Using a Package Repository for Cloudera Manager
        • Configuring a Custom Java Home Location
        • Installing Lower Versions of Cloudera Manager 5
        • Creating a CDH Cluster Using a Cloudera Manager Template
      • Deploying Clients
      • Testing the Installation
      • Uninstalling Cloudera Manager and Managed Software
      • Uninstalling a CDH Component From a Single Host
      • Installing the Cloudera Navigator Data Management Component
      • Installing Cloudera Navigator Key Trustee Server
      • Installing Cloudera Navigator Key HSM
      • Installing Key Trustee KMS
      • Installing Cloudera Navigator Encrypt
    • Installing and Deploying CDH Using the Command Line
      • Before You Install CDH 5 on a Cluster
      • Creating a Local Yum Repository
      • Installing the Latest CDH 5 Release
      • Installing an Earlier CDH 5 Release
      • CDH 5 and MapReduce
      • Migrating from MapReduce (MRv1) to MapReduce (MRv2)
      • Deploying CDH 5 on a Cluster
        • Configuring Dependencies Before Deploying CDH on a Cluster
          • Enable an NTP Service
          • Configuring Network Names
          • Disabling SELinux
          • Disabling the Firewall
        • Deploying HDFS on a Cluster
        • Deploying MapReduce v2 (YARN) on a Cluster
        • Deploying MapReduce v1 (MRv1) on a Cluster
        • Configuring Hadoop Daemons to Run at Startup
      • Installing CDH 5 Components
        • Crunch Installation
          • Crunch Prerequisites
          • Crunch Packaging
          • Installing and Upgrading Crunch
          • Crunch Documentation
        • Flume Installation
          • Upgrading Flume
          • Flume Packaging
          • Installing the Flume Tarball
          • Installing the Flume RPM or Debian Packages
          • Flume Configuration
          • Verifying the Flume Installation
          • Running Flume
          • Files Installed by the Flume RPM and Debian Packages
          • Supported Sources, Sinks, and Channels
          • Viewing the Flume Documentation
        • HBase Installation
          • New Features and Changes for HBase in CDH 5
          • Upgrading HBase
          • Installing HBase
          • Configuration Settings for HBase
          • Starting HBase in Standalone Mode
          • Configuring HBase in Pseudo-Distributed Mode
          • Deploying HBase on a Cluster
          • Accessing HBase by using the HBase Shell
          • HBase Online Merge
          • Using MapReduce with HBase
          • Troubleshooting HBase
          • Viewing the HBase Documentation
        • HCatalog Installation
          • HCatalog Prerequisites
          • Installing and Upgrading the HCatalog RPM or Debian Packages
          • Configuration Change on Hosts Used with HCatalog
          • Starting and Stopping the WebHCat REST server
          • Accessing Table Information with the HCatalog Command-line API
          • Accessing Table Data with MapReduce
          • Accessing Table Data with Pig
          • Accessing Table Information with REST
          • Viewing the HCatalog Documentation
        • Impala Installation
          • Requirements
          • Installing Impala without Cloudera Manager
          • Upgrading Impala
          • Starting Impala
            • Modifying Impala Startup Options
        • Hive Installation
          • Installing Hive
          • Upgrading Hive
          • Configuring the Hive Metastore
          • Configuring HiveServer2
          • Starting the Metastore
          • File System Permissions
          • Starting, Stopping, and Using HiveServer2
          • Starting HiveServer1 and the Hive Console
          • Using Hive with HBase
          • Using the Hive Schema Tool
          • Installing the Hive JDBC Driver on Clients
          • Setting HADOOP_MAPRED_HOME
          • Configuring the Metastore to Use HDFS High Availability
          • Troubleshooting Hive
          • Viewing the Hive Documentation
        • HttpFS Installation
          • About HttpFS
          • HttpFS Packaging
          • HttpFS Prerequisites
          • Installing HttpFS
          • Configuring HttpFS
          • Starting the HttpFS Server
          • Stopping the HttpFS Server
          • Using the HttpFS Server with curl
        • Hue Installation
          • Supported Browsers for Hue
          • Upgrading Hue
          • Installing Hue
          • Configuring CDH Components for Hue
          • Hue Configuration
          • Administering Hue
            • Using an External Database for Hue Using the Command Line
          • Viewing the Hue User Guide
        • KMS Installation and Upgrade
        • Mahout Installation
          • Upgrading Mahout
          • Installing Mahout
          • The Mahout Executable
          • Getting Started with Mahout
          • Viewing the Mahout Documentation
        • Oozie Installation
          • About Oozie
          • Oozie Packaging
          • Oozie Prerequisites
          • Upgrading Oozie
          • Installing Oozie
          • Configuring Oozie
          • Starting, Stopping, and Accessing the Oozie Server
          • Viewing the Oozie Documentation
        • Pig Installation
          • Upgrading Pig
          • Installing Pig
          • Using Pig with HBase
          • Installing DataFu
          • Viewing the Pig Documentation
        • Search Installation
          • Preparing to Install Cloudera Search
          • Installing Cloudera Search
            • Installing Cloudera Search without Cloudera Manager
            • Deploying Cloudera Search
            • Installing the Spark Indexer
            • Installing MapReduce Tools for use with Cloudera Search
            • Installing the Lily HBase Indexer Service
          • Upgrading Cloudera Search
          • Installing Hue Search
            • Updating Hue Search
        • Sentry Installation
        • Snappy Installation
        • Spark Installation
          • Spark Packages
          • Spark Prerequisites
          • Installing and Upgrading Spark
        • Sqoop 1 Installation
          • Upgrading Sqoop 1 from an Earlier CDH 5 release
          • Sqoop 1 Packaging
          • Sqoop 1 Prerequisites
          • Installing the Sqoop 1 RPM or Debian Packages
          • Installing the Sqoop 1 Tarball
          • Installing the JDBC Drivers for Sqoop 1
          • Setting HADOOP_MAPRED_HOME
          • Viewing the Sqoop 1 Documentation
        • Sqoop 2 Installation
          • Upgrading Sqoop 2 from an Earlier CDH 5 Release
          • Installing Sqoop 2
          • Configuring Sqoop 2
          • Starting, Stopping, and Accessing the Sqoop 2 Server
          • Viewing the Sqoop 2 Documentation
          • Feature Differences - Sqoop 1 and Sqoop 2
        • Whirr Installation
          • Upgrading Whirr
          • Installing Whirr
          • Generating an SSH Key Pair for Whirr
          • Defining a Whirr Cluster
          • Managing a Cluster with Whirr
          • Viewing the Whirr Documentation
        • ZooKeeper Installation
          • Upgrading ZooKeeper from an Earlier CDH 5 Release
          • Installing the ZooKeeper Packages
          • Maintaining a ZooKeeper Server
          • Viewing the ZooKeeper Documentation
      • Building RPMs from CDH Source RPMs
        • Prerequisites
        • Setting Up an Environment for Building RPMs
        • Building an RPM
      • Apache and Third-Party Licenses
        • Apache License
        • Third-Party Licenses
      • Uninstalling CDH Components
      • Viewing the Apache Hadoop Documentation
    • Installation with the EMC DSSD D5
      • DSSD D5 Installation Path A - Automated Installation by Cloudera Manager Installer (Non-Production)
      • DSSD D5 Installation Path B - Installation Using Cloudera Manager Parcels
      • DSSD D5 Installation Path C - Manual Installation Using Cloudera Manager Tarballs
      • DSSD D5 and Short-Circuit Reads
      • Tuning the HDFS Block Size for DSSD Mode
      • Adding an Additional DSSD D5 to a Cluster
    • Troubleshooting Installation and Upgrade Problems
  • Upgrade
  • Cloudera Administration
    • Managing CDH and Managed Services
      • Managing CDH and Managed Services Using Cloudera Manager
        • Configuration Overview
          • Modifying Configuration Properties Using Cloudera Manager
          • Modifying Configuration Properties (Classic Layout)
          • Autoconfiguration
          • Custom Configuration
          • Stale Configurations
          • Client Configuration Files
          • Viewing and Reverting Configuration Changes
          • Exporting and Importing Cloudera Manager Configuration
        • Managing Clusters
          • Adding and Deleting Clusters
          • Starting, Stopping, Refreshing, and Restarting a Cluster
          • Renaming a Cluster
          • Cluster-Wide Configuration
          • Moving a Host Between Clusters
        • Managing Services
          • Adding a Service
          • Comparing Configurations for a Service Between Clusters
          • Add-on Services
          • Starting, Stopping, and Restarting Services
          • Rolling Restart
          • Aborting a Pending Command
          • Deleting Services
          • Renaming a Service
          • Configuring Maximum File Descriptors
        • Managing Roles
          • Role Instances
          • Role Groups
        • Managing Hosts
          • Viewing Host Details
          • Using the Host Inspector
          • Adding a Host to the Cluster
          • Specifying Racks for Hosts
          • Host Templates
          • Decommissioning and Recommissioning Hosts
          • Deleting Hosts
        • Maintenance Mode
        • Cloudera Manager Configuration Properties
      • Managing CDH Using the Command Line
        • Starting CDH Services Using the Command Line
          • Configuring init to Start Hadoop System Services
          • Starting and Stopping HBase Using the Command Line
        • Stopping CDH Services Using the Command Line
        • Migrating Data between Clusters Using distcp
          • Copying Cluster Data Using DistCp
          • Copying Data between a Secure and an Insecure Cluster using DistCp and WebHDFS
          • Post-migration Verification
        • Decommissioning DataNodes Using the Command Line
      • Managing Individual Services
        • Managing Flume
        • Managing the HBase Service
          • Managing HBase
          • Managing HBase Security
          • Starting and Stopping HBase
          • Accessing HBase by using the HBase Shell
          • Using HBase Command-Line Utilities
          • Configuring HBase Garbage Collection
          • Configuring the HBase Canary
          • Checking and Repairing HBase Tables
          • Hedged Reads
          • Configuring the Blocksize for HBase
          • Configuring the HBase BlockCache
          • Configuring the HBase Scanner Heartbeat
          • Limiting the Speed of Compactions
          • Reading Data from HBase
          • HBase Filtering
          • Writing Data to HBase
          • Importing Data Into HBase
          • Configuring and Using the HBase REST API
          • Configuring HBase MultiWAL Support
          • Storing Medium Objects (MOBs) in HBase
          • Configuring the Storage Policy for the Write-Ahead Log (WAL)
          • Exposing HBase Metrics to a Ganglia Server
          • Using HashTable and SyncTable Tool
        • Managing HDFS
          • NameNodes
            • Backing Up and Restoring HDFS Metadata
            • Moving NameNode Roles
            • Sizing NameNode Heap Memory
            • Backing Up and Restoring NameNode Metadata
          • DataNodes
            • Configuring Storage Directories for DataNodes
            • Configuring Storage Balancing for DataNodes
            • Performing Disk Hot Swap for DataNodes
          • JournalNodes
          • Configuring Short-Circuit Reads
          • Configuring HDFS Trash
          • HDFS Balancers
          • Enabling WebHDFS
          • Adding HttpFS
          • Adding and Configuring an NFS Gateway
          • Setting HDFS Quotas
          • Configuring Mountable HDFS
          • Configuring Centralized Cache Management in HDFS
          • Configuring Proxy Users to Access HDFS
          • Using CDH with Isilon Storage
          • Configuring Heterogeneous Storage in HDFS
        • Managing Hive
          • Managing Hive Using Cloudera Manager
          • Running Hive on Spark
          • HiveServer2 Web UI
          • Hive Table Statistics
          • Managing User-Defined Functions (UDFs) with HiveServer2
        • Managing Hue
          • Adding a Hue Service and Role Instance
          • Hue and High Availability
          • Managing Hue Analytics Data Collection
          • Enabling Hue Applications Using Cloudera Manager
          • Using an External Database for Hue
            • Using an External Database for Hue Using Cloudera Manager
            • Using an External Database for Hue Using the Command Line
        • Managing Impala
          • The Impala Service
          • Post-Installation Configuration for Impala
          • Configuring Impala to Work with ODBC
          • Configuring Impala to Work with JDBC
        • Managing Key-Value Store Indexer
        • Managing Oozie
          • Oozie High Availability
          • Adding the Oozie Service Using Cloudera Manager
          • Redeploying the Oozie ShareLib
          • Configuring Oozie Data Purge Settings Using Cloudera Manager
          • Dumping and Loading an Oozie Database Using Cloudera Manager
          • Adding Schema to Oozie Using Cloudera Manager
          • Enabling the Oozie Web Console
          • Enabling Oozie SLA with Cloudera Manager
          • Setting the Oozie Database Timezone
          • Scheduling in Oozie Using Cron-like Syntax
        • Managing Solr
        • Managing Spark
          • Managing Spark Using Cloudera Manager
          • Managing Spark Standalone Using the Command Line
          • Managing the Spark History Server
        • Managing the Sqoop 1 Client
        • Managing Sqoop 2
        • Managing YARN (MRv2) and MapReduce (MRv1)
          • Managing YARN
          • Managing YARN ACLs
          • Managing MapReduce
        • Managing ZooKeeper
        • Configuring Services to Use the GPL Extras Parcel
    • Performance Management
      • Optimizing Performance in CDH
      • Choosing and Configuring Data Compression
      • Tuning Hive
      • Tuning Hive on Spark
      • Tuning the Solr Server
      • Tuning Spark Applications
      • Tuning YARN
    • Resource Management
      • Static Service Pools
        • Linux Control Groups (cgroups)
      • Dynamic Resource Pools
      • YARN (MRv2) and MapReduce (MRv1) Schedulers
        • Configuring the Fair Scheduler
        • Enabling and Disabling Fair Scheduler Preemption
      • Resource Management for Impala
        • Admission Control and Query Queuing
        • Managing Impala Admission Control
      • Cluster Utilization Reports
    • High Availability
      • HDFS High Availability
        • Introduction to HDFS High Availability
        • Configuring Hardware for HDFS HA
        • Enabling HDFS HA
        • Disabling and Redeploying HDFS HA
        • Configuring Other CDH Components to Use HDFS HA
        • Administering an HDFS High Availability Cluster
        • Changing a Nameservice Name for Highly Available HDFS Using Cloudera Manager
      • MapReduce (MRv1) and YARN (MRv2) High Availability
        • YARN (MRv2) ResourceManager High Availability
        • Work Preserving Recovery for YARN Components
        • MapReduce (MRv1) JobTracker High Availability
      • Cloudera Navigator Key Trustee Server High Availability
      • Key Trustee KMS High Availability
      • High Availability for Other CDH Components
        • HBase High Availability
          • HBase Read Replicas
        • Hive Metastore High Availability
        • Configuring HS2 HA
        • Hue High Availability
        • Oozie High Availability
        • Search High Availability
      • Configuring Cloudera Manager for High Availability With a Load Balancer
        • Introduction to Cloudera Manager Deployment Architecture
        • Prerequisites for Setting up Cloudera Manager High Availability
        • Cloudera Manager Failover Protection
        • High-Level Steps to Configure Cloudera Manager High Availability
          • Step 1: Setting Up Hosts and the Load Balancer
          • Step 2: Installing and Configuring Cloudera Manager Server for High Availability
          • Step 3: Installing and Configuring Cloudera Management Service for High Availability
          • Step 4: Automating Failover with Corosync and Pacemaker
        • Database High Availability Configuration
        • TLS and Kerberos Configuration for Cloudera Manager High Availability
    • Backup and Disaster Recovery
      • Port Requirements for Backup and Disaster Recovery
      • Data Replication
        • Designating a Replication Source
        • HDFS Replication
          • HDFS Replication Tuning
        • HBase Replication
        • Hive Replication
        • Impala Metadata Replication
        • Using Snapshots with Replication
        • Enabling Replication Between Clusters in Different Kerberos Realms
        • Replication of Encrypted Data
      • Snapshots
        • Cloudera Manager Snapshot Policies
        • Managing HBase Snapshots
        • Managing HDFS Snapshots
    • Cloudera Manager Administration
      • Starting, Stopping, and Restarting the Cloudera Manager Server
      • Configuring Cloudera Manager Server Ports
      • Moving the Cloudera Manager Server to a New Host
      • Managing the Cloudera Manager Server Log
      • Cloudera Manager Agents
        • Starting, Stopping, and Restarting Cloudera Manager Agents
        • Configuring Cloudera Manager Agents
        • Managing Cloudera Manager Agent Logs
      • Changing Hostnames
      • Configuring Network Settings
      • Alerts
        • Managing Alerts
          • Configuring Alert Email Delivery
          • Configuring Alert SNMP Delivery
          • Configuring Custom Alert Scripts
      • Managing Licenses
      • Sending Usage and Diagnostic Data to Cloudera
      • Exporting and Importing Cloudera Manager Configuration
      • Backing up Cloudera Manager
      • Other Cloudera Manager Tasks and Settings
      • Cloudera Management Service
    • Cloudera Navigator Data Management Component Administration
      • Cloudera Navigator Audit Server
        • Configuring Service Audit Collection and Log Properties
        • Configuring Service Auditing Properties
        • Publishing Audit Events
      • Cloudera Navigator Metadata Server
        • Managing Hive and Impala Lineage Properties
        • Managing Metadata
        • Managing Metadata Policies
    • How To Create a Multitenant Enterprise Data Hub
  • Cloudera Data Management
    • Cloudera Navigator Metadata Architecture
      • Metadata Extraction and Indexing
      • Metadata Search Syntax and Properties
      • Accessing Metadata
      • Defining Managed Metadata
      • Adding and Editing Metadata
      • Performing Actions on Entities
      • Cloudera Navigator Provenance Use Case
    • Cloudera Navigator Auditing Architecture
      • Cloudera Navigator Auditing
      • Cloudera Navigator Audit Event Reports
      • Downloading HDFS Directory Access Permission Reports
      • Cloudera Navigator Auditing Use Cases
    • Cloudera Navigator Analytics
    • Metadata Policies
      • Metadata Policy Expressions
    • Cloudera Navigator Lineage Diagrams
      • Schema
  • Cloudera Operation
    • Monitoring and Diagnostics
      • Introduction to Cloudera Manager Monitoring
        • Time Line
        • Health Tests
        • Cloudera Manager Admin Console Home Page
        • Viewing Charts for Cluster, Service, Role, and Host Instances
        • Configuring Monitoring Settings
      • Monitoring Clusters
      • Monitoring Multiple CDH Deployments Using the Multi Cloudera Manager Dashboard
        • Installing and Managing the Multi Cloudera Manager Dashboard
        • Using the Multi Cloudera Manager Status Dashboard
      • Monitoring Services
        • Monitoring Service Status
        • Viewing Service Status
        • Viewing Service Instance Details
        • Viewing Role Instance Status
          • The Processes Tab
        • Running Diagnostic Commands for Roles
        • Periodic Stacks Collection
        • Viewing Running and Recent Commands
        • Monitoring Resource Management
      • Monitoring Hosts
        • Host Details
        • Host Inspector
      • Monitoring Activities
        • Monitoring MapReduce Jobs
          • Viewing and Filtering MapReduce Activities
          • Viewing the Jobs in a Pig, Oozie, or Hive Activity
          • Task Attempts
          • Viewing Activity Details in a Report Format
          • Comparing Similar Activities
          • Viewing the Distribution of Task Attempts
        • Monitoring Impala Queries
          • Query Details
        • Monitoring YARN Applications
        • Monitoring Spark Applications
      • Events
      • Triggers
        • Cloudera Manager Trigger Use Cases
      • Lifecycle and Security Auditing
      • Charting Time-Series Data
        • Dashboards
        • tsquery Language
        • Metric Aggregation
      • Logs
        • Viewing the Cloudera Manager Server Log
        • Viewing the Cloudera Manager Agent Logs
        • Managing Disk Space for Log Files
      • Reports
        • Directory Usage Report
        • Disk Usage Reports
        • Activity, Application, and Query Reports
        • The File Browser
        • Downloading HDFS Directory Access Permission Reports
      • Troubleshooting Cluster Configuration and Operation
    • Cloudera Manager Entity Types
    • Cloudera Manager Entity Type Attributes
    • Cloudera Manager Events
      • LOG_MESSAGE Category
      • HBASE Category
      • HEALTH_CHECK Category
      • SYSTEM Category
      • AUDIT_EVENT Category
      • ACTIVITY_EVENT Category
    • Cloudera Manager Health Tests
      • Active Database Health Tests
      • Active Key Trustee Server Health Tests
      • Activity Monitor Health Tests
      • Alert Publisher Health Tests
      • Beeswax Server Health Tests
      • Cloudera Management Service Health Tests
      • DSSD DataNode Health Tests
      • DataNode Health Tests
      • Event Server Health Tests
      • Failover Controller Health Tests
      • Flume Health Tests
      • Flume Agent Health Tests
      • Garbage Collector Health Tests
      • HBase Health Tests
      • HBase REST Server Health Tests
      • HBase Thrift Server Health Tests
      • HDFS Health Tests
      • History Server Health Tests
      • Hive Health Tests
      • Hive Metastore Server Health Tests
      • HiveServer2 Health Tests
      • Host Health Tests
      • Host Monitor Health Tests
      • HttpFS Health Tests
      • Hue Health Tests
      • Hue Server Health Tests
      • Impala Health Tests
      • Impala Catalog Server Health Tests
      • Impala Daemon Health Tests
      • Impala Llama ApplicationMaster Health Tests
      • Impala StateStore Health Tests
      • JobHistory Server Health Tests
      • JobTracker Health Tests
      • JournalNode Health Tests
      • Kafka Broker Health Tests
      • Kafka MirrorMaker Health Tests
      • Kerberos Ticket Renewer Health Tests
      • Key Management Server Health Tests
      • Key Management Server Proxy Health Tests
      • Key-Value Store Indexer Health Tests
      • Lily HBase Indexer Health Tests
      • Load Balancer Health Tests
      • Logger Health Tests
      • MapReduce Health Tests
      • Master Health Tests
      • Monitor Health Tests
      • NFS Gateway Health Tests
      • NameNode Health Tests
      • Navigator Audit Server Health Tests
      • Navigator Metadata Server Health Tests
      • NodeManager Health Tests
      • Oozie Health Tests
      • Oozie Server Health Tests
      • Passive Database Health Tests
      • Passive Key Trustee Server Health Tests
      • RegionServer Health Tests
      • Reports Manager Health Tests
      • ResourceManager Health Tests
      • SecondaryNameNode Health Tests
      • Sentry Health Tests
      • Sentry Server Health Tests
      • Service Monitor Health Tests
      • Solr Health Tests
      • Solr Server Health Tests
      • Sqoop 2 Health Tests
      • Sqoop 2 Server Health Tests
      • Tablet Server Health Tests
      • TaskTracker Health Tests
      • Tracer Health Tests
      • WebHCat Server Health Tests
      • Worker Health Tests
      • YARN (MR2 Included) Health Tests
      • ZooKeeper Health Tests
      • ZooKeeper Server Health Tests
    • Cloudera Manager Metrics
      • Accumulo Metrics
      • Accumulo 1.6 Metrics
      • Active Database Metrics
      • Active Key Trustee Server Metrics
      • Activity Metrics
      • Activity Monitor Metrics
      • Agent Metrics
      • Alert Publisher Metrics
      • Attempt Metrics
      • Beeswax Server Metrics
      • Cloudera Management Service Metrics
      • Cloudera Manager Server Metrics
      • Cluster Metrics
      • DSSD DataNode Metrics
      • DataNode Metrics
      • Directory Metrics
      • Disk Metrics
      • Event Server Metrics
      • Failover Controller Metrics
      • Filesystem Metrics
      • Flume Metrics
      • Flume Channel Metrics
      • Flume Sink Metrics
      • Flume Source Metrics
      • Garbage Collector Metrics
      • HBase Metrics
      • HBase REST Server Metrics
      • HBase RegionServer Replication Peer Metrics
      • HBase Thrift Server Metrics
      • HDFS Metrics
      • HDFS Cache Directive Metrics
      • HDFS Cache Pool Metrics
      • HRegion Metrics
      • HTable Metrics
      • History Server Metrics
      • Hive Metrics
      • Hive Metastore Server Metrics
      • HiveServer2 Metrics
      • Host Metrics
      • Host Monitor Metrics
      • HttpFS Metrics
      • Hue Metrics
      • Hue Server Metrics
      • Impala Metrics
      • Impala Catalog Server Metrics
      • Impala Daemon Metrics
      • Impala Daemon Resource Pool Metrics
      • Impala Llama ApplicationMaster Metrics
      • Impala Pool Metrics
      • Impala Pool User Metrics
      • Impala Query Metrics
      • Impala StateStore Metrics
      • Isilon Metrics
      • Java KeyStore KMS Metrics
      • JobHistory Server Metrics
      • JobTracker Metrics
      • JournalNode Metrics
      • Kafka Metrics
      • Kafka Broker Metrics
      • Kafka Broker Topic Metrics
      • Kafka MirrorMaker Metrics
      • Kafka Replica Metrics
      • Kerberos Ticket Renewer Metrics
      • Key Management Server Metrics
      • Key Management Server Proxy Metrics
      • Key Trustee KMS Metrics
      • Key Trustee Server Metrics
      • Key-Value Store Indexer Metrics
      • Lily HBase Indexer Metrics
      • Load Balancer Metrics
      • Logger Metrics
      • MapReduce Metrics
      • Master Metrics
      • Monitor Metrics
      • NFS Gateway Metrics
      • NameNode Metrics
      • Navigator Audit Server Metrics
      • Navigator Metadata Server Metrics
      • Network Interface Metrics
      • NodeManager Metrics
      • Oozie Metrics
      • Oozie Server Metrics
      • Passive Database Metrics
      • Passive Key Trustee Server Metrics
      • RegionServer Metrics
      • Reports Manager Metrics
      • ResourceManager Metrics
      • SecondaryNameNode Metrics
      • Sentry Metrics
      • Sentry Server Metrics
      • Server Metrics
      • Service Monitor Metrics
      • Solr Metrics
      • Solr Replica Metrics
      • Solr Server Metrics
      • Solr Shard Metrics
      • Spark Metrics
      • Spark (Standalone) Metrics
      • Spark 2 Metrics
      • Sqoop 1 Client Metrics
      • Sqoop 2 Metrics
      • Sqoop 2 Server Metrics
      • Tablet Server Metrics
      • TaskTracker Metrics
      • Time Series Table Metrics
      • Tracer Metrics
      • User Metrics
      • WebHCat Server Metrics
      • Worker Metrics
      • YARN (MR2 Included) Metrics
      • YARN Pool Metrics
      • YARN Pool User Metrics
      • ZooKeeper Metrics
  • Cloudera Security
    • Security Overview for an Enterprise Data Hub
      • Authentication Overview
      • Data Protection Overview
      • Authorization Overview
      • Data Management Overview
    • How to Configure TLS Encryption for Cloudera Manager
    • Configuring Authentication
      • Configuring Authentication in Cloudera Manager
        • Cloudera Manager User Accounts
        • Configuring External Authentication for Cloudera Manager
        • Kerberos Concepts - Principals, Keytabs and Delegation Tokens
        • Enabling Kerberos Authentication Using the Wizard
          • Step 1: Install Cloudera Manager and CDH
          • Step 2: If You are Using AES-256 Encryption, Install the JCE Policy File
          • Step 3: Get or Create a Kerberos Principal for the Cloudera Manager Server
          • Step 4: Enabling Kerberos Using the Wizard
          • Step 5: Create the HDFS Superuser
          • Step 6: Get or Create a Kerberos Principal for Each User Account
          • Step 7: Prepare the Cluster for Each User
          • Step 8: Verify that Kerberos Security is Working
          • Step 9: (Optional) Enable Authentication for HTTP Web Consoles for Hadoop Roles
        • Enabling Kerberos Authentication for Single User Mode or Non-Default Users
        • Configuring a Cluster with Custom Kerberos Principals
        • Managing Kerberos Credentials Using Cloudera Manager
        • Using a Custom Kerberos Keytab Retrieval Script
        • Mapping Kerberos Principals to Short Names
        • Moving Kerberos Principals to Another OU Within Active Directory
        • Using Auth-to-Local Rules to Isolate Cluster Users
        • Enabling Kerberos Authentication Without the Wizard
          • Step 1: Install Cloudera Manager and CDH
          • Step 2: If You are Using AES-256 Encryption, Install the JCE Policy File
          • Step 3: Get or Create a Kerberos Principal for the Cloudera Manager Server
          • Step 4: Import KDC Account Manager Credentials
          • Step 5: Configure the Kerberos Default Realm in the Cloudera Manager Admin Console
          • Step 6: Stop All Services
          • Step 7: Enable Hadoop Security
          • Step 8: Wait for the Generate Credentials Command to Finish
          • Step 9: Enable Hue to Work with Hadoop Security using Cloudera Manager
          • Step 10: (Flume Only) Use Substitution Variables for the Kerberos Principal and Keytab
          • Step 11: Start All Services
          • Step 12: Deploy Client Configurations
          • Step 13: Create the HDFS Superuser Principal
          • Step 14: Get or Create a Kerberos Principal for Each User Account
          • Step 15: Prepare the Cluster for Each User
          • Step 16: Verify that Kerberos Security is Working
          • Step 17: (Optional) Enable Authentication for HTTP Web Consoles for Hadoop Roles
      • Configuring Authentication in the Cloudera Navigator Data Management Component
        • Configuring External Authentication for the Cloudera Navigator Data Management Component
        • Managing Users and Groups for the Cloudera Navigator Data Management Component
      • Configuring Authentication in CDH Using the Command Line
        • Enabling Kerberos Authentication for Hadoop Using the Command Line
          • Step 1: Install CDH 5
          • Step 2: Verify User Accounts and Groups in CDH 5 Due to Security
          • Step 3: If you are Using AES-256 Encryption, Install the JCE Policy File
          • Step 4: Create and Deploy the Kerberos Principals and Keytab Files
          • Step 5: Shut Down the Cluster
          • Step 6: Enable Hadoop Security
          • Step 7: Configure Secure HDFS
          • Optional Step 8: Configuring Security for HDFS High Availability
          • Optional Step 9: Configure secure WebHDFS
          • Optional Step 10: Configuring a secure HDFS NFS Gateway
          • Step 11: Set Variables for Secure DataNodes
          • Step 12: Start up the NameNode
          • Step 12: Start up a DataNode
          • Step 14: Set the Sticky Bit on HDFS Directories
          • Step 15: Start up the Secondary NameNode (if used)
          • Step 16: Configure Either MRv1 Security or YARN Security
            • Configuring MRv1 Security
            • Configuring YARN Security
        • FUSE Kerberos Configuration
        • Using kadmin to Create Kerberos Keytab Files
        • Configuring the Mapping from Kerberos Principals to Short Names
        • Enabling Debugging Output for the Sun Kerberos Classes
      • Flume Authentication
        • Configuring Flume's Security Properties
        • Configuring Kerberos for Flume Thrift Source and Sink Using Cloudera Manager
        • Configuring Kerberos for Flume Thrift Source and Sink Using the Command Line
        • Flume Account Requirements
        • Testing the Flume HDFS Sink Configuration
        • Writing to a Secure HBase Cluster
      • HBase Authentication
        • Configuring Kerberos Authentication for HBase
        • Configuring Secure HBase Replication
        • Configuring the HBase Client TGT Renewal Period
      • HCatalog Authentication
      • Hive Authentication
        • HiveServer2 Security Configuration
        • Hive Metastore Server Security Configuration
        • Using Hive to Run Queries on a Secure HBase Server
      • HttpFS Authentication
      • Hue Authentication
        • Configuring Kerberos Authentication for Hue
        • Integrating Hue with LDAP
        • Configuring Hue for SAML
      • Impala Authentication
        • Enabling Kerberos Authentication for Impala
        • Enabling LDAP Authentication for Impala
        • Using Multiple Authentication Methods with Impala
        • Configuring Impala Delegation for Hue and BI Tools
      • Llama Authentication
      • Oozie Authentication
        • Configuring Kerberos Authentication for the Oozie Server
        • Configuring Oozie HA with Kerberos
      • Solr Authentication
        • Using Kerberos with Solr
      • Spark Authentication
        • Configuring Spark on YARN for Long-Running Applications
      • Sqoop 2 Authentication
      • ZooKeeper Authentication
      • Hadoop Users in Cloudera Manager and CDH
      • Configuring a Cluster-dedicated MIT KDC with Cross-Realm Trust
      • Integrating Hadoop Security with Active Directory
      • Integrating Hadoop Security with Alternate Authentication
      • Authenticating Kerberos Principals in Java Code
      • Using a Web Browser to Access an URL Protected by Kerberos HTTP SPNEGO
      • Troubleshooting Authentication Issues
    • Configuring Encryption
      • TLS/SSL Certificates Overview
        • Creating Certificates
        • Creating Java Keystores and Truststores
        • Private Key and Certificate Reuse Across Java Keystores and OpenSSL
      • Configuring TLS Security for Cloudera Manager
        • Configuring TLS Encryption Only for Cloudera Manager
        • Level 1: Configuring TLS Encryption for Cloudera Manager Agents
        • Level 2: Configuring TLS Verification of Cloudera Manager Server by the Agents
        • Level 3: Configuring TLS Authentication of Agents to the Cloudera Manager Server
        • HTTPS Communication in Cloudera Manager
        • Troubleshooting TLS/SSL Issues in Cloudera Manager
        • Using Self-Signed Certificates for TLS
      • Configuring TLS/SSL for the Cloudera Navigator Data Management Component
      • Configuring TLS/SSL for Publishing Cloudera Navigator Audit Events to Kafka
      • Configuring TLS/SSL for Cloudera Management Service Roles
      • Configuring TLS/SSL Encryption for CDH Services
        • Configuring TLS/SSL for HDFS, YARN and MapReduce
        • Configuring TLS/SSL for HBase
        • Configuring TLS/SSL for Flume Thrift Source and Sink
        • Configuring Encrypted Communication Between HiveServer2 and Client Drivers
        • Configuring TLS/SSL for Hue
        • Configuring TLS/SSL for Impala
        • Configuring TLS/SSL for Oozie
        • Configuring TLS/SSL for Solr
        • Spark Encryption
        • Configuring TLS/SSL for HttpFS
        • Encrypted Shuffle and Encrypted Web UIs
      • Deployment Planning for Data at Rest Encryption
        • Data at Rest Encryption Reference Architecture
        • Data at Rest Encryption Requirements
        • Resource Planning for Data at Rest Encryption
      • HDFS Transparent Encryption
        • Optimizing Performance for HDFS Transparent Encryption
        • Enabling HDFS Encryption Using the Wizard
        • Managing Encryption Keys and Zones
        • Configuring the Key Management Server (KMS)
        • Securing the Key Management Server (KMS)
        • Migrating Keys from a Java KeyStore to Cloudera Navigator Key Trustee Server
        • Configuring CDH Services for HDFS Encryption
        • Troubleshooting HDFS Encryption
      • Cloudera Navigator Key Trustee Server
        • Backing Up and Restoring Key Trustee Server and Clients
        • Initializing Standalone Key Trustee Server
        • Configuring a Mail Transfer Agent for Key Trustee Server
        • Verifying Cloudera Navigator Key Trustee Server Operations
        • Managing Key Trustee Server Organizations
        • Managing Key Trustee Server Certificates
      • Cloudera Navigator Key HSM
        • Initializing Navigator Key HSM
        • HSM-Specific Setup for Cloudera Navigator Key HSM
        • Validating Key HSM Settings
        • Creating a Key Store with CA-Signed Certificate
        • Managing the Navigator Key HSM Service
        • Integrating Key HSM with Key Trustee Server
      • Cloudera Navigator Encrypt
        • Registering Cloudera Navigator Encrypt with Key Trustee Server
        • Preparing for Encryption Using Cloudera Navigator Encrypt
        • Encrypting and Decrypting Data Using Cloudera Navigator Encrypt
        • Migrating eCryptfs-Encrypted Data to dm-crypt
        • Navigator Encrypt Access Control List
        • Maintaining Cloudera Navigator Encrypt
      • Configuring Encryption for Data Spills
        • Configuring Encrypted On-disk File Channels for Flume
      • Configuring Encrypted HDFS Data Transport
      • Configuring Encrypted HBase Data Transport
    • Configuring Authorization
      • Cloudera Manager User Roles
      • Cloudera Navigator Data Management Component User Roles
      • HDFS Extended ACLs
      • Configuring LDAP Group Mappings
      • Authorization With Apache Sentry
        • The Sentry Service
          • Installing and Upgrading the Sentry Service
          • Migrating from Sentry Policy Files to the Sentry Service
          • Configuring the Sentry Service
          • Sentry Debugging and Failure Scenarios
          • Hive SQL Syntax for Use with Sentry
          • Synchronizing HDFS ACLs and Sentry Permissions
          • Using the Sentry Web Server
        • Sentry Policy File Authorization
          • Installing and Upgrading Sentry for Policy File Authorization
          • Configuring Sentry Policy File Authorization Using Cloudera Manager
          • Configuring Sentry Policy File Authorization Using the Command Line
        • Enabling Sentry Authorization for Impala
        • Configuring Sentry Authorization for Cloudera Search
      • Configuring HBase Authorization
    • Sensitive Data Redaction
    • Overview of Impala Security
      • Security Guidelines for Impala
      • Securing Impala Data and Log Files
      • Installation Considerations for Impala Security
      • Securing the Hive Metastore Database
      • Securing the Impala Web User Interface
    • Miscellaneous Topics
      • Jsvc, Task Controller and Container Executor Programs
        • MRv1 ONLY: Task-controller Error Codes
        • YARN ONLY: Container-executor Error Codes
      • Sqoop, Pig, and Whirr Security Support Status
      • Setting Up a Gateway Node to Restrict Cluster Access
      • Logging a Security Support Case
      • Using Antivirus Software on CDH Hosts
  • Hue Guide
    • Installation & Upgrade
    • Databases
      • Connect Hue to MySQL or MariaDB
      • Connect Hue to PostgreSQL
      • Connect Hue to Oracle (Parcel)
      • Connect Hue to Oracle (Package)
      • Migrate Hue Database
      • Hue Custom Database Tutorial
      • Populate the Hue Database
    • Administration
    • Security
    • Hue How-tos
      • Add a Hue Load Balancer
      • Run Hue Shell Commands
    • Troubleshooting
      • Potential Misconfiguration
  • Impala Guide
    • Concepts and Architecture
      • Components
      • Developing Applications
      • Role in the Hadoop Ecosystem
    • Deployment Planning
      • Requirements
      • Designing Schemas
    • Tutorials
    • Administration
      • How to Configure Resource Management for Impala
      • Setting Timeouts
      • Load-Balancing Proxy for HA
      • Managing Disk Space
      • Auditing
      • Viewing Lineage Info
    • SQL Reference
      • Comments
      • Data Types
        • ARRAY Complex Type (CDH 5.5 or higher only)
        • BIGINT
        • BOOLEAN
        • CHAR
        • DECIMAL
        • DOUBLE
        • FLOAT
        • INT
        • MAP Complex Type (CDH 5.5 or higher only)
        • REAL
        • SMALLINT
        • STRING
        • STRUCT Complex Type (CDH 5.5 or higher only)
        • TIMESTAMP
        • TINYINT
        • VARCHAR
        • Complex Types (CDH 5.5 or higher only)
      • Literals
      • SQL Operators
      • Schema Objects and Object Names
        • Aliases
        • Databases
        • Functions
        • Identifiers
        • Tables
        • Views
      • SQL Statements
        • DDL Statements
        • DML Statements
        • ALTER TABLE
        • ALTER VIEW
        • COMPUTE STATS
        • CREATE DATABASE
        • CREATE FUNCTION
        • CREATE ROLE
        • CREATE TABLE
        • CREATE VIEW
        • DESCRIBE
        • DROP DATABASE
        • DROP FUNCTION
        • DROP ROLE
        • DROP STATS
        • DROP TABLE
        • DROP VIEW
        • EXPLAIN
        • GRANT
        • INSERT
        • INVALIDATE METADATA
        • LOAD DATA
        • REFRESH
        • REVOKE
        • SELECT
          • Joins
          • ORDER BY Clause
          • GROUP BY Clause
          • HAVING Clause
          • LIMIT Clause
          • OFFSET Clause
          • UNION Clause
          • Subqueries
          • WITH Clause
          • DISTINCT Operator
          • Hints
        • SET
          • Query Options for the SET Statement
            • ABORT_ON_DEFAULT_LIMIT_EXCEEDED
            • ABORT_ON_ERROR
            • ALLOW_UNSUPPORTED_FORMATS
            • APPX_COUNT_DISTINCT
            • BATCH_SIZE
            • COMPRESSION_CODEC
            • DEBUG_ACTION
            • DEFAULT_ORDER_BY_LIMIT
            • DISABLE_CODEGEN
            • DISABLE_ROW_RUNTIME_FILTERING
            • DISABLE_STREAMING_PREAGGREGATIONS
            • DISABLE_UNSAFE_SPILLS
            • EXEC_SINGLE_NODE_ROWS_THRESHOLD
            • EXPLAIN_LEVEL
            • HBASE_CACHE_BLOCKS
            • HBASE_CACHING
            • LIVE_PROGRESS
            • LIVE_SUMMARY
            • MAX_ERRORS
            • MAX_IO_BUFFERS
            • MAX_SCAN_RANGE_LENGTH
            • MAX_NUM_RUNTIME_FILTERS
            • MEM_LIMIT
            • NUM_NODES
            • NUM_SCANNER_THREADS
            • OPTIMIZE_PARTITION_KEY_SCANS
            • PARQUET_COMPRESSION_CODEC
            • PARQUET_ANNOTATE_STRINGS_UTF8
            • PARQUET_FALLBACK_SCHEMA_RESOLUTION
            • PARQUET_FILE_SIZE
            • PREFETCH_MODE
            • QUERY_TIMEOUT_S
            • REQUEST_POOL
            • SCHEDULE_RANDOM_REPLICA
            • RESERVATION_REQUEST_TIMEOUT
            • RUNTIME_BLOOM_FILTER_SIZE
            • RUNTIME_FILTER_MAX_SIZE
            • RUNTIME_FILTER_MIN_SIZE
            • RUNTIME_FILTER_MODE
            • RUNTIME_FILTER_WAIT_TIME_MS
            • S3_SKIP_INSERT_STAGING
            • SCAN_NODE_CODEGEN_THRESHOLD
            • SUPPORT_START_OVER
            • SYNC_DDL
            • V_CPU_CORES
        • SHOW
        • TRUNCATE TABLE
        • USE
      • Built-In Functions
        • Mathematical Functions
        • Bit Functions
        • Type Conversion Functions
        • Date and Time Functions
        • Conditional Functions
        • String Functions
        • Miscellaneous Functions
        • Aggregate Functions
          • APPX_MEDIAN
          • AVG
          • COUNT
          • GROUP_CONCAT
          • MAX
          • MIN
          • NDV
          • STDDEV, STDDEV_SAMP, STDDEV_POP
          • SUM
          • VARIANCE, VARIANCE_SAMP, VARIANCE_POP, VAR_SAMP, VAR_POP
        • Analytic Functions
        • Impala User-Defined Functions (UDFs)
      • SQL Differences Between Impala and Hive
      • Porting SQL
    • The Impala Shell
      • Configuration Options
      • Connecting to impalad
      • Running Commands and SQL Statements
      • Command Reference
    • Performance Tuning
      • Performance Best Practices
      • Join Performance
      • Table and Column Statistics
      • Benchmarking
      • Controlling Resource Usage
      • Runtime Filtering
      • HDFS Caching
      • Testing Impala Performance
      • EXPLAIN Plans and Query Profiles
      • HDFS Block Skew
    • Scalability Considerations
    • Partitioning
    • File Formats
      • Text Data Files
      • Parquet Data Files
      • Avro Data Files
      • RCFile Data Files
      • SequenceFile Data Files
    • HBase Tables
    • S3 Tables
    • Isilon Storage
    • Logging
    • Troubleshooting Impala
      • Web User Interface
      • Breakpad Minidumps
    • Ports Used by Impala
    • Impala Reserved Words
    • Impala Frequently Asked Questions
  • HBase Guide
  • Hive Guide
  • Cloudera Search Guide
    • Cloudera Search User Guide
      • Cloudera Search Tutorial
        • Validating the Cloudera Search Deployment
        • Preparing to Index Sample Tweets with Cloudera Search
        • Using MapReduce Batch Indexing to Index Sample Tweets
        • Near Real Time (NRT) Indexing Tweets Using Flume
        • Using Hue with Cloudera Search
      • Managing Solr Using solrctl
        • solrctl Reference
        • Example solrctl Usage
      • Spark Indexing
      • MapReduce Batch Indexing Reference
        • MapReduceIndexerTool
          • MapReduceIndexerTool Metadata
        • HdfsFindTool
      • Flume Near Real-Time Indexing Reference
        • Flume Morphline Solr Sink Configuration Options
        • Flume Morphline Interceptor Configuration Options
        • Flume Solr UUIDInterceptor Configuration Options
        • Flume Solr BlobHandler Configuration Options
        • Flume Solr BlobDeserializer Configuration Options
      • Extracting, Transforming, and Loading Data With Cloudera Morphlines
        • Example Morphline Usage
      • Using the Lily HBase Batch Indexer for Indexing
        • HBaseMapReduceIndexerTool
      • Configuring the Lily HBase NRT Indexer Service for Use with Cloudera Search
        • Using the Lily HBase NRT Indexer Service
      • Schemaless Mode Overview and Best Practices
      • Using Search through a Proxy for High Availability
      • Migrating Solr Replicas
      • Using Custom JAR Files with Search
      • Cloudera Search Frequently Asked Questions
      • Troubleshooting Cloudera Search
        • Static Solr Log Analysis
  • Spark Guide
    • Running Your First Spark Application
    • Spark Application Overview
    • Developing Spark Applications
      • Developing and Running a Spark WordCount Application
      • Using Spark Streaming
      • Using Spark SQL
      • Using Spark MLlib
      • Accessing External Storage
        • Accessing Data Stored in Amazon S3 through Spark
        • Accessing Avro Data Files From Spark SQL Applications
        • Accessing Parquet Files From Spark SQL Applications
      • Building Spark Applications
      • Configuring Spark Applications
    • Running Spark Applications
      • Running Spark Applications on YARN
      • Using PySpark
        • Running Spark Python Applications
        • Spark and IPython and Jupyter Notebooks
      • Tuning Spark Applications
    • Spark and Hadoop Integration
      • Building and Running a Crunch Application with Spark
  • Cloudera Glossary

MAX_IO_BUFFERS Query Option

Deprecated query option. Currently has no effect.

Type: numeric

Default: 0

Categories: Data Analysts | Deprecated Features | Developers | Impala | Impala Query Options | All Categories

MAX_ERRORS
MAX_SCAN_RANGE_LENGTH
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