Cov txheej txheem:
- Yuav ua li cas yog tias peb hloov pauv qhov hloov pauv hauv HDFS?
- Kuv yuav sau dua hauv HDFS li cas?
- Peb puas tuaj yeem hloov pauv qhov hloov pauv hauv Hadoop?
- Dab tsi yog qhov rov ua dua hauv Hadoop?
Video: Puas muab cov xwm txheej rov sau dua hauv hdfs?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
hdfs-site. … xml yuav hloov pauv qhov rov ua dua qub rau txhua cov ntaub ntawv muab tso rau hauv HDFS. Koj tuaj yeem hloov kho qhov rov ua dua tshiab ntawm ib-cov ntaub ntawv siv lub Hadoop FS Plhaub: [training@localhost ~] $ hadoopfs –setrep –w 3 /my/fileConversely, koj tuaj yeem hloov pauv qhov hloov pauv ntawm tag nrho cov ntaub ntawv hauv qab. directory.
Yuav ua li cas yog tias peb hloov pauv qhov hloov pauv hauv HDFS?
2 Teb. Tab sis kev hloov pauv qhov tseem ceeb rau daim ntawv teev npe tsuas yog cuam tshuam rau cov ntaub ntawv uas twb muaj lawm thiab cov ntaub ntawv tshiab nyob rau hauv phau ntawv qhia yuav tau tsim nrog lub neej hloov pauv(dfs. replication los ntawm hdfs-site. … Thov saib txuas rau configure replication factor rau HDFS.
Kuv yuav sau dua hauv HDFS li cas?
Luam cov ntaub ntawv los ntawm cov ntaub ntawv hauv zos rau HDFS, zoo ib yam li -put hais kom ua. Cov lus txib no yuav tsis ua haujlwm yog tias cov ntaub ntawv twb muaj lawm. Yuav overwrite lub lo lus uas peb yog cov ntaub ntawv twb muaj lawm, ntxiv -f chij rau command.
Peb puas tuaj yeem hloov pauv qhov hloov pauv hauv Hadoop?
Koj tuaj yeem hloov pauv qhov hloov pauv tau ntawm ib-cov ntaub ntawv siv Hadoop FS plhaub. Xwb, koj tuaj yeem hloov pauv qhov hloov pauv ntawm tag nrho cov ntaub ntawv hauv qab daim ntawv teev npe.
Dab tsi yog qhov rov ua dua hauv Hadoop?
Cov blocks ntau dhau yog blocks uas tshaj lawv lub hom phiaj rov ua dua rau cov ntaub ntawv uas lawv zwm rau. Feem ntau, over-replication tsis yog ib qho teeb meem, thiab HDFS yuav cia li rho tawm ntau dua replicas.
Pom zoo:
Vim li cas cov ntawv xov xwm pabcuam raug muab tso rau hauv cov txheej txheem tshuaj xyuas?
Lawv ceeb toom rau cov tswv dav hlau thiab cov tswv ntawm cov xwm txheej tsis zoo uas xav tau kev tshuaj xyuas tshwj xeeb, hloov pauv, lossis kho dua. Daim Ntawv Qhia Kev Pabcuam (S.B.) yog ib daim ntawv ceeb toom rau tus neeg tsav dav hlau los ntawm lub chaw tsim khoom qhia nws txog kev txhim kho cov khoom .
Dab tsi yog cov xwm txheej rau txheej txheem haber?
Cua yog 78 feem pua nitrogen thiab yuav luag tag nrho cov seem yog oxygen. Thaum hydrogen hlawv hauv huab cua, cov pa oxygen ua ke nrog hydrogen - tawm hauv nitrogen tom qab. a qhov kub siab - txog 450 ° C a siab siab - txog 200 cua(200 npaug li qub siab) Vim li cas cov xwm txheej siv hauv Haber txheej txheem?
Puas rov muab dua lossis rov muab dua?
yam uas tawm dua, ua ib phau ntawv lossis daim duab. ib tug nom reprinting ntawm ib tsab ntawv thwj tom qab tus thawj luam ntawv tau raug tso tseg. verb (siv nrog cov khoom), re·is·sued, re·is·su·ing . Qhov twg yog qhov teeb meem rov qab los yog rov ua dua?
Cov xwm txheej puas tuaj yeem rov qhib dua?
Ib tsab ntawv rov qhib hais kom lub tsev hais plaub rov tshuaj xyuas rooj plaub. Yuav kom ua tiav qhov no, yuav tsum muaj pov thawj tshiab uas tau tshawb pom tom qab qhov xaus ntawm rooj plaub. Hauv rooj plaub rov qhib dua, cov pov thawj tshiab yuav raug hnov los ntawm tib tus kws txiav txim plaub, leej twg yuav rov txiav txim dua tshiab.
Puas yog cov hlau hloov pauv pom tsis sib xyaw hauv cov xwm txheej?
Vim lawv yog cov hlau, cov kev hloov pauv feem ntau hu ua cov hlau hloov pauv. Raws li ib pab pawg, lawv pom cov khoom siv hlau zoo thiab tsis tshua muaj zog dua cov hlau hauv Pawg 1 thiab 2. Qee qhov paub ntau dua yog li unreactiveuas lawv tuaj yeem pom nyob rau hauv cov xwm txheej hauv lawv.
