Nodetool kho yog dab tsi?
Nodetool kho yog dab tsi?

Video: Nodetool kho yog dab tsi?

Video: Nodetool kho yog dab tsi?
Video: 00508 नाडो टूट गो रूसगी सलवार Imma singer new mewati song 2021_ #VarisRj05 2024, Kaum ib hlis
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Nodetool kho . kho - Cov txheej txheem uas khiav hauv keeb kwm yav dhau thiab synchronizes cov ntaub ntawv ntawm cov nodes, yog li thaum kawg, tag nrho cov replicas tuav tib cov ntaub ntawv. Cov kho hais kom ua yuav tsum tau ua rau tag nrho cov nodes hauv pawg.

Tsis tas li ntawd, Cassandra kho ua haujlwm li cas?

Cassandra yog tsim los kom nyob twj ywm muaj yog tias ib qho ntawm nws cov nodes poob los yog tsis tuaj yeem ncav cuag. Kho synchronizes cov ntaub ntawv ntawm nodes los ntawm kev sib piv lawv cov datasets rau lawv cov hom token ntau yam, thiab streaming qhov sib txawv rau ib qho tawm ntawm sync seem ntawm cov nodes.

Dab tsi yog nyeem kho hauv Cassandra? Nyeem - kho yog ib tug tub nkeeg mechanism nyob rau hauv Cassandra uas xyuas kom meej tias cov ntaub ntawv koj thov los ntawm cov ntaub ntawv yog qhov tseeb thiab zoo ib yam. Rau txhua tus nyeem thov, tus coordinator node thov rau tag nrho cov node muaj cov ntaub ntawv thov los ntawm tus neeg siv khoom. Tag nrho cov nodes rov qab cov ntaub ntawv uas tus neeg thov rau.

Tsis tas li lo lus nug yog, Kuv yuav ua li cas thiaj li nres Nodetool kho hauv Cassandra?

Qhov no tuaj yeem yog nres los ntawm, ua los ntawm kev hu rau forceTerminateAllRepairSessions hauv StorageServiceMBean ntawm JMX. Los ntawm qhov ntawd koj yuav tsum khiav lub " nodetool nres VALIDATION" ntawm txhua qhov rau tua cov validation compactions.

Dab tsi yog bootstrap hauv Cassandra?

Cov bootstrap feature hauv Apache Cassandra tswj lub peev xwm rau cov ntaub ntawv nyob rau hauv pawg kom tau txais kev faib rov qab thaum lub node tshiab tso. Cov node tshiab koom nrog pawg yog txhais tias yog ib qho khoob ntawm qhov tsis muaj kab lus lossis cov ntaub ntawv.

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