Cov txheej txheem:

Yuav ua li cas koj tawm ntawm Impala plhaub?
Yuav ua li cas koj tawm ntawm Impala plhaub?

Video: Yuav ua li cas koj tawm ntawm Impala plhaub?

Video: Yuav ua li cas koj tawm ntawm Impala plhaub?
Video: Tuag ua Dab los yuav cab kom tau 11/14/2018 2024, Kaum ib hlis
Anonim

Nws tsis tau tawm ntawm lub plhaub impala siv "Ctrl + D" thaum muaj ntau kab hais kom ua tiav. Cov kab lus ntau kab yuav tsum raug kaw siv ";" ua ntej nws yuav ua tau tawm tus plhaub.

Ua li no, ua li cas koj qhib lub plhaub Impala?

Txhawm rau txuas Impala plhaub tom qab lub plhaub pib:

  1. Pib lub plhaub Impala uas tsis muaj kev sib txuas: $ impala-plhaub.
  2. Nrhiav lub hostname ntawm DataNode nyob rau hauv pawg uas tab tom khiav ib qho piv txwv ntawm impalad daemon.
  3. Siv cov lus txib txuas txuas mus rau qhov piv txwv Impala.

Kuv yuav txuas Kerberos thiab Impala plhaub li cas? Txhawm rau pab Kerberos hauv Impala plhaub , pib lub impala - plhaub hais kom siv tus chij -k. Txhawm rau pab Impala ua haujlwm nrog Kerberos kev ruaj ntseg ntawm koj pawg Hadoop, xyuas kom tseeb tias koj ua qhov kev teeb tsa thiab teeb tsa cov kauj ruam hauv Kev lees paub hauv Hadoop.

Ntawm no, vim li cas Shell hais kom siv hauv Impala plhaub?

Siv cov Impala Plhaub ( impala - plhaub Command ) Koj tuaj yeem siv lub Impala plhaub cuab tam ( impala - plhaub ) txhawm rau teeb tsa cov ntaub ntawv thiab cov ntxhuav, ntxig cov ntaub ntawv, thiab teeb tsa cov lus nug. Qhov kev xaiv -f tso cai rau koj ua cov ntaub ntawv uas muaj ntau nqe lus SQL, xws li cov lus ceeb toom los yog DDL nqe lus los tsim ib pab pawg ntawm cov lus thiab kev pom.

Cov lus txib twg hauv Impala retrieves metadata rau txhua lub rooj?

Tus piav lus txib ntawm Impala muab cov metadata ntawm a rooj . Nws muaj cov ntaub ntawv zoo li kab thiab lawv hom ntaub ntawv. Tus piav lus txib muaj desc raws li ib tug luv luv txiav. Qhov poob lus txib yog siv los tshem tawm qhov tsim los ntawm Impala , qhov twg ib tug tsim yuav ua tau ib rooj , saib, lossis database muaj nuj nqi.

Pom zoo: