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.
