Video: Glue crawler ua haujlwm li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
2 Teb. Cov CRAWLER tsim cov metadata uas tso cai GLUE thiab cov kev pabcuam xws li ATHENA los saib cov ntaub ntawv S3 raws li cov ntaub ntawv nrog cov ntxhuav. Ntawd yog, nws tso cai rau koj los tsim cov Kua nplaum Catalog. Txoj kev no koj tuaj yeem pom cov ntaub ntawv uas s3 muaj raws li cov ntaub ntawv muaj li ntawm ntau lub rooj.
Tom qab ntawd, AWS nplaum crawler ua haujlwm li cas?
Ib AWS Glue crawler txuas mus rau lub khw muag ntaub ntawv, nce qib los ntawm cov npe tseem ceeb ntawm cov khoom lag luam kom rho tawm cov schema ntawm koj cov ntaub ntawv thiab lwm yam kev txheeb cais, thiab tom qab ntawd populates lub Kua nplaum Cov ntaub ntawv Catalog nrog cov metadata no.
Tom qab, lo lus nug yog, yog AWS kua nplaum qhib qhov chaw? Amazon Qhib Qhov Chaw Python Library rau AWS Glue . Amazon muaj qhib -sourced lub tsev qiv ntawv Python hu ua Athena Kua nplaum Kev Pabcuam Logs (AGSlogger) uas ua rau nws yooj yim dua los txheeb xyuas cov ntawv sau rau hauv AWS Glue rau kev tsom xam thiab yog npaj rau siv nrog AWS kev pabcuam log.
Tsuas yog, tuaj yeem teeb tsa hauv AWS kua nplaum?
AWS Glue yog serverless, yog li tsis muaj infrastructure rau teeb nce los yog tswj. Koj ua tau kuj siv cov AWS Glue API ua haujlwm rau kev sib txuas nrog AWS Glue kev pabcuam. Kho kom raug, debug, thiab sim koj tus Python lossis Scala Apache Spark ETL code siv qhov chaw paub txog kev txhim kho.
AWS Glue Free?
Ib yam khoom hauv AWS Glue Data Catalog yog ib lub rooj, rooj version, muab faib, los yog database. Thawj lab nkag thov rau lub AWS Glue Cov ntaub ntawv Catalog ib hlis twg dawb . Yog tias koj tshaj li ib lab thov hauv ib hlis, koj yuav raug them $ 1.00 ib lab thov tshaj thawj lab.
Pom zoo:
Kuv tuaj yeem qhia tau li cas yog tias lub sijhawm ua haujlwm tau ua haujlwm?
Txhawm rau kom paub meej tias txoj haujlwm tau ua haujlwm thiab ua haujlwm tau zoo, ua raws li cov kauj ruam no: 1 Qhib lub qhov rais Task Scheduler. 2 Los ntawm sab laug ntawm lub qhov rais, qhib lub nplaub tshev uas muaj cov haujlwm. 3 Xaiv ib txoj haujlwm los ntawm qhov chaw saum toj kawg nkaus ntawm Task Scheduler qhov rais. 4 Nyob rau hauv qab-hauv nruab nrab ntawm lub qhov rais, nyem qhov Keeb kwm tab
Nws txhais li cas rau kev ua haujlwm kom rov ua haujlwm dua?
Ib txoj haujlwm yog rov ua dua yog tias nws tuaj yeem raug hu thaum twb nyob rau hauv tus txheej txheem ntawm kev ua. Ntawd yog, kev ua haujlwm yog rov ua dua yog tias nws tuaj yeem cuam tshuam hauv nruab nrab ntawm kev ua tiav (piv txwv li, los ntawm lub teeb liab lossis cuam tshuam) thiab rov hais dua ua ntej kev cuam tshuam kev ua tiav
Koj ua haujlwm ntau npaum li cas tom haujlwm?
Yuav ua li cas Multitask ua kom tiav Kev Npaj. Thawj kauj ruam kom ua tau zoo multitasking shaving ib txoj kev npaj los yog teem lub hom phiaj. Muab cov haujlwm zoo sib xws los ua haujlwm rau tib lub sijhawm. Tshem tawm kev cuam tshuam. Ua tib zoo txheeb xyuas koj cov haujlwm thiab cov hom phiaj. Siv sijhawm los tshuaj xyuas koj txoj haujlwm
JMeter ua haujlwm li cas rau kev ntsuas kev ua haujlwm?
Nws tuaj yeem siv los txheeb xyuas tag nrho cov server ua haujlwm hauv qab hnyav. JMeter tuaj yeem siv los ntsuas qhov ua tau zoo ntawm ob qho tib si cov peev txheej xws li JavaScript thiab HTML, nrog rau cov peev txheej muaj zog, xws li JSP, Servlets, thiab AJAX. JMeter muab ntau yam kev txheeb xyuas duab ntawm cov ntawv ceeb toom ua haujlwm
Koj tuaj yeem ua dab tsi nrog lub web crawler?
Web crawlers feem ntau yog siv los tsim cov ntawv luam ntawm tag nrho cov nplooj ntawv tuaj xyuas tom qab ua tiav los ntawm lub tshuab tshawb nrhiav, uas yuav ntsuas cov nplooj ntawv rub tawm los muab kev tshawb nrhiav sai.Crawlers kuj tseem siv tau rau kev tswj xyuas kev ua haujlwm ntawm lub vev xaib, xws li tshawb xyuas cov ntawv txuas lossis siv tau. HTMLcode