Video: Qhov zoo ntawm RAID yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Nws txhim kho qhov kev ua tau zoo los ntawm kev tso cov ntaub ntawv ntawm ntau lub disks. Lub tswv yim / tso zis (I / O) kev ua haujlwm tuaj yeem sib tshooj hauv kev sib npaug thiab nws txo qhov kev pheej hmoo ntawm kev poob tag nrho cov ntaub ntawv yog tias ib lub tsav tsis ua haujlwm. RAID cia siv ntau lub disks txhawm rau muab qhov ua txhaum cai thiab nws ua rau kom muaj peev xwm khaws cia ntawm qhov system.
Ntawm no, qhov txiaj ntsig ntawm RAID yog dab tsi?
RAID (Redundant Array of Inexpensive Disks) yog ib lub kaw lus tsim los ntawm ob lossis ntau lub disks yog lub cev sib txuas ua ke los tsim ib qho laj thawj, muaj peev xwm loj uas muaj ntau yam khoom siv. qhov zoo tshaj li cov khoom siv hard disk cia: kev ua tau zoo dua. txhim kho resilience. tus nqi qis dua.
Ib yam li ntawd, qhov zoo ntawm RAID 5 yog dab tsi? Cov Cov txiaj ntsig ntawm RAID 5 Feem ntau yog los ntawm nws kev sib xyaw siv disk striping thiab parity. Striping yog cov txheej txheem ntawm kev khaws cov ntu sib law liag ntawm cov ntaub ntawv sib txawv ntawm cov khoom siv sib txawv, thiab tso cai rau kev ua haujlwm zoo dua thiab ua haujlwm tau zoo. Disk striping ib leeg tsis ua rau array txhaum, txawm li cas los xij.
Ib yam li ntawd, qhov zoo thiab qhov tsis zoo ntawm RAID 1 yog dab tsi?
RAID 1 – Mirroring
| Qhov zoo thiab qhov tsis zoo ntawm RAID 1 | |
|---|---|
| Qhov zoo | Qhov tsis zoo |
| Nws yog ib qho yooj yim thiab yooj yim rau kev siv tshuab | Siv tau cov ntaub ntawv cia muaj peev xwm tsuas yog ib nrab ntawm tag nrho cov muaj peev xwm tsav vim cov ntaub ntawv rov ua dua. |
Qhov zoo ntawm RAID 0 yog dab tsi?
Lub ntsiab kom zoo dua ntawm RAID 0 thiab disk striping yog txhim kho kev ua tau zoo . Piv txwv li, striping cov ntaub ntawv hla peb lub hard disks yuav muab peb npaug ntawm bandwidth ntawm ib lub drive. Yog hais tias txhua lub tsav khiav ntawm 200 input / output ua haujlwm ib ob, disk striping yuav ua rau muaj txog 600 IOPS rau cov ntaub ntawv nyeem thiab sau.
Pom zoo:
Dab tsi yog qhov piv txwv ntawm qhov zoo nrog rau qhov zoo network sab nraud cuam tshuam?
Cov piv txwv classic yog xov tooj, qhov twg ntau tus neeg siv nce tus nqi rau txhua tus. Qhov zoo sab nraud yog tsim thaum lub xov tooj tau yuav yam tsis muaj nws tus tswv xav tsim kom muaj txiaj ntsig rau lwm tus neeg siv, tab sis ua li ntawd txawm tias
Dab tsi yog qhov txawv ntawm kev sib raug zoo unary kev sib raug zoo binary thiab kev sib raug zoo ternary?
Kev sib raug zoo tsis sib xws yog thaum ob tus neeg koom hauv kev sib raug zoo yog tib lub koom haum. Piv txwv li: Cov ncauj lus yuav yog qhov yuav tsum tau ua ua ntej rau lwm yam kev kawm. Kev sib raug zoo ternary yog thaum peb lub koom haum koom nrog kev sib raug zoo
Dab tsi yog sparse kem Dab tsi yog qhov zoo thiab qhov tsis zoo?
Koj poob 4 bytes tsis yog ib zaug ib kab; tab sis rau txhua lub cell hauv kab uas tsis yog null. Qhov zoo ntawm SPARSE kem yog: Qhov tsis zoo ntawm SPARSE kem yog: SPARSE kem tsis tuaj yeem siv rau ntawm cov ntawv, ntext, duab, timestamp, geometry, geography lossis cov neeg siv cov ntaub ntawv teev tseg
Dab tsi yog qhov qub txeeg qub teg Dab tsi yog qhov sib txawv ntawm qhov qub txeeg qub teg piav nrog piv txwv?
Inheritance yog ib txoj hauv kev kom tau txais cov yam ntxwv thiab kev coj cwj pwm ntawm ib chav kawm los ntawm lwm chav kawm. Cov chav kawm uas cov tswv cuab tau txais qub txeeg qub teg yog hu ua chav kawm hauv paus, thiab chav kawm uas tau txais cov tswv cuab tam sim no hu ua chav derived. Inheritance siv IS-A kev sib raug zoo
Dab tsi yog qhov zoo sib xws thiab qhov txawv ntawm relays thiab PLC yog dab tsi?
Relays yog electro-mechanical keyboards uas muaj coil thiab ob hom kev sib cuag uas tsis yog NO & NC. Tab sis Programmable Logic Controller, PLC yog lub khoos phis tawj me uas tuaj yeem txiav txim siab raws li qhov kev zov me nyuam thiab nws cov tswv yim & tso tawm