1

I installed Hive 3.1.0 on top Hadoop 3.1.1(without using Ambari). How can I enable LLAP feature in Hive.

tk421
  • 5,775
  • 6
  • 23
  • 34
Nandu
  • 151
  • 1
  • 2
  • 12

2 Answers2

0

Configuring LLAP is covered in Hive Configuration Properties: LLAP section. To enable it you need to change hive.llap.execution.mode.

The document describes how to set hive.llap.execution.mode:

  • Default Value: none
  • Possible Values:
    • none: not tried
    • map: only map operators are considered for llap
    • all: every operator is tried; but falls back to no-llap in case of problems
    • only: same as "all" but stops with an exception if execution is not possible (as of 2.2.0 with HIVE-15135)
    • auto: conversion is controlled by hive

For more information about LLAP refer to https://cwiki.apache.org/confluence/display/Hive/LLAP.

tk421
  • 5,775
  • 6
  • 23
  • 34
  • 3
    Hive documentation has no information how to start LLAP containers in Yarn. All it says is "LLAP can be deployed via Slider". Slider project is outdated. Hive can create LLAP-app for Yarn. But I can't find how to properly configure and start LLAP-daemon on my Hadoop nodes. – sOliver Nov 22 '18 at 12:03
0

This is a documentation for setting up LLAP (Apache Hive Performance Tuning ) in hortonworks:

https://docs.hortonworks.com/HDPDocuments/HDP3/HDP-3.1.0/performance-tuning/content/hive_setting_up_llap.html

Ali AzG
  • 1,861
  • 2
  • 18
  • 28