Cov txheej txheem:

Cov phiaj xwm twg yog npua tsim tom qab ua qhov yooj yim parsing thiab tshawb xyuas semantic?
Cov phiaj xwm twg yog npua tsim tom qab ua qhov yooj yim parsing thiab tshawb xyuas semantic?

Video: Cov phiaj xwm twg yog npua tsim tom qab ua qhov yooj yim parsing thiab tshawb xyuas semantic?

Video: Cov phiaj xwm twg yog npua tsim tom qab ua qhov yooj yim parsing thiab tshawb xyuas semantic?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
Anonim

Npua undergo qee cov kauj ruam thaum a Npua Cov ntawv Latin tau hloov mus rau hauv MapReduce cov haujlwm. Tom qab ua qhov yooj yim parsing thiab semantic checking , nws tsim tawm ib qho laj thawj npaj . Qhov laj thawj npaj piav qhia txog cov neeg ua haujlwm logical uas yuav tsum tau ua los ntawm Npua thaum ua tiav.

Ib yam li ntawd, puas yog lub hauv paus rau kev sau thiab khaws cov ntawv qib kev txheeb cais rau npua Latin?

Pig Statistics yog lub hauv paus rau kev sau thiab khaws cov ntawv - qib kev txheeb cais rau npua Latin . Yam ntxwv ntawm Pig Latin scripts thiab qhov tshwm sim MapReduce cov hauj lwm raug sau thaum lub tsab ntawv raug tua.

Ib yam li ntawd, lub neej ntawd hom npua yog dab tsi? Txoj kev ua hom hauv Apache Npua yog: MapReduce Hom : Qhov no yog default hom , uas yuav tsum tau nkag mus rau Hadoop pawg thiab HDFS installation. Txij li thaum, qhov no yog a default hom , nws tsis tas yuav qhia meej -x chij (koj tuaj yeem ua tiav npua LOSSIS npua -x mapreduce). Input thiab output nyob rau hauv no hom muaj nyob rau hauv HDFS.

Tsis tas li ntawd, tus neeg teb xov tooj twg yog siv los tshuaj xyuas qhov schema ntawm kev sib raug zoo?

Tus piav tus neeg teb xov tooj siv saib cov schema ntawm kev sib raug zoo.

Dab tsi yog cov khoom ntawm npua tua ib puag ncig?

Cia peb saib cov khoom tseem ceeb

  • Parser. Thaum xub thawj cov Pig Scripts yog ua los ntawm Parser.
  • Optimizer. Txoj kev npaj kom muaj kev sib haum xeeb (DAG) raug xa mus rau qhov kev ua kom zoo tshaj plaws, uas ua rau kev ua kom zoo dua qub xws li kev kwv yees thiab kev thawb.
  • Compiler.
  • Execution cav.
  • Atom.
  • Tuple.
  • Hnab.
  • Daim ntawv qhia.

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