Tam sim no, feem ntau cov keyboards ntawm kev ua lag luam, tshwj xeeb tshaj yog cov keyboards qub, tsuas yog siv ib lub hwj chim xwb. Yog hais tias lub hwj huam mov tsis ua hauj lwm (xws li lub hwj chim tsis ua hauj lwm), qhov hloov pauv tsis tuaj yeem ua haujlwm ib txwm, lossis txawm tias ua rau lub network tuag tes tuag taw.Redundant fais fab mov yog ib qho kev daws teeb meem zoo rau qhov teeb meem no. Cov keyboards tsim nrog cov khoom siv hluav taws xob tsis tu ncua tuaj yeem txhim kho kev ruaj ntseg network thiab xyuas kom tsis muaj kev cuam tshuam ntawm cov khoom siv. Yog li, dab tsi yog lub zog siv hluav taws xob rov ua dua thiab vim li cas thiaj li yuav tsum tau txais kev hloov pauv hloov hluav taws xob rov qab tsim?

Dab tsi yog qhov khoom siv hluav taws xob rov ua dua?

Redundant fais fab mov yog hais txog kev tsim ib qho khoom siv network siv ob lossis ntau lub zog siv lub cev, thiab txhua lub zog hluav taws xob tuaj yeem ua lub zog ntawm nws tus kheej. Lub sijhawm no, txawm tias lub zog tsis ua haujlwm, lwm yam khoom siv hluav taws xob yuav tam sim ntawd dais lub hwj huam mov ntawm cov khoom siv kom ntseeg tau tias cov khoom siv ua haujlwm zoo li qub. Cov servers lossis disk arrays feem ntau tau txais cov qauv siv hluav taws xob rov ua dua, uas tuaj yeem tiv thaiv hluav taws xob tsis zoo lossis lwm yam tsis ua haujlwm (xws li lub sijhawm poob) ntawm cov khoom siv. Tam sim no, kev tsim hluav taws xob rov ua dua tshiab tau dhau los ua neeg nyiam hauv kev hloov pauv network thiab lwm yam khoom siv vim nws qhov tshwj xeeb zoo.

Txheej txheem cej luam ntawm hloov redundant fais fab mov

Fais fab mov redundancy feem ntau siv cov khoom siv hluav taws xob xws li ua kom tiav redundancy thiab ib nrab redundancy. Tag nrho redundancy (tseem hu ua 1 + 1 redundancy) txhais tau hais tias qhov hloov pauv tau nruab nrog ob lub zog hluav taws xob. Yog tias ib lub hwj chim module tsis ua haujlwm, lwm lub hwj chim module tuaj yeem txuas ntxiv muab lub zog ib txwm tsis cuam tshuam rau kev ua haujlwm hauv lub network. Ib nrab redundancy (1 + N redundancy) txhais tau hais tias "1 ntxiv fais fab mov" muab lub zog rau "N" hloov. Thov nco ntsoov tias qhov tsis zoo ntawm cov khoom siv hluav taws xob tsis zoo hauv zos yog tias muaj lub sijhawm hloov pauv hluav taws xob, uas yog, cov khoom siv hluav taws xob rov qab yuav tsum tau muab lub zog rau lub cuab yeej tom qab qee lub sijhawm, uas yuav ua rau muaj kev cuam tshuam hauv network. Daim duab 1 qhia txog cov kev ua haujlwm sib txawv ntawm kev rov ua dua tshiab thiab ib nrab redundancy.

Feem ntau, lub zog hluav taws xob dual hauv lub network hloov tau txais kev tsim hluav taws xob tsis txaus siab. Thov nco ntsoov tias nyob rau hauv ib txwm muaj xwm txheej, ob qho khoom siv hluav taws xob yuav raug siv thiab ua haujlwm tib lub sijhawm. Txawm li cas los xij, vim muaj cov khoom siv sib txawv, cov khoom siv hluav taws xob thaub qab ntawm qee qhov kev hloov pauv tsis tau muab los ntawm cov tuam txhab kuj tseem tuaj yeem ua haujlwm.