Disamba 3, 2019

Menene RAID? - Ma'anoni, Mahimmanci, Aiki

definition

hari (a yau an san shi da Redundant Array na Independent Disks) fasaha ce ta ƙwarewar bayanai wanda ke haɗuwa da motsa jiki da yawa a cikin mahimmin abu don sakewa da ƙara haɓaka. Ainihi, yana ba mu damar haɓaka ƙimar aiki gaba ɗaya da haɓaka amincin bayanan da aka adana.

Tarihi

Asali, hari tsararru aka koma zuwa Redundant Array na M Fayafai - kamar yadda suka maye gurbinsu SOL (Single Large Expensive Drive), fasahar da aka yi amfani da ita a baya, wanda, kamar yadda sunan ya nuna, ya dogara da amfani da babbar faifai ɗaya tare da manufar haɓaka aminci. Koyaya, saboda tasirin farashi mai sauƙi, masu siyar da masana'antu ba da daɗewa ba sun dage don gyara mai bayanin.

Kodayake an riga an ambaci fasahar da ke nuni da amfani da faya-fayai da yawa a cikin samfuran daban-daban kafin a fitar da takardar, amma David Patterson, Garth Gibson da Randy Katz ne suka ƙirƙiro da ra'ayin RAID ajiyar kanta. rahoton fasaha "Shari'a don forididdigar raididdigar Fayafai Mai Raha (RAID)", wanda aka rubuta a cikin 1988.

Kayan yau da kullum

Kamar yadda aka fada a sama, RAID tana wakiltar haɗin haɗin diski na jiki da yawa a cikin ɗaya (ko fiye) na ma'ana don rarraba bayanai a duk faɗin. Matakan RAID daban-daban, ko makirci, tura dabaru daban-daban don tunkarar bayanan da aka adana ta ɗayan hanyoyi da yawa (ƙwanƙwasawa, mirginawa, daidaito, ko haɗuwa da su), wanda ke ba da daidaito tsakanin abin dogaro, kasancewa, aiki, da ƙarfin - dangane da matuƙar bukatun. Lambar da ke bin kalmar "RAID" tana nufin sanyi (matakin), wanda ake amfani da shi don aiki da bayanan da aka adana.

Anan akwai abubuwan daidaita RAID guda uku:

  • Tsiri: yana raba bayanai zuwa bulo, yana rarraba gudan tsakanin magudanar;
  • Mirroring: adana kwafin bayanai iri ɗaya a lokaci guda a cikin tubala daban-daban.
  • Parity: yana kirga batan da ya ɓace don hana tsarin zuwa ƙasa a cikin yanayin ɓoyayyen motsi ko ɓacewar bayanai.

rumbun kwamfutarka, faifai, adanawa

Matsayin RAID

Da farko, matakan RAID guda biyar ne kawai. Koyaya, bisa ga ci gaban da suka samu tsawon shekaru, ƙungiyoyi da yawa sun kirkiro nasu daidaitattun daidaitattun abubuwa kuma sun shirya tsararrun (matasan) don biyan buƙatun musamman na ƙaramin rukuni. Don bincika bambance-bambance a cikin zaɓuɓɓukan da aka bayar, duba www.salvagedata.com/raid-configuration.

A ƙasa zaku iya samun manyan matakan RAID guda huɗu.

RAID 0. Ya ƙunshi ratsi; yana rarraba bayanan da aka adana a faifan diski biyu ko sama, ba tare da mirroring, parity, ko redundancy ba. RAID 0 ba ya ba da haƙuri na kuskure, wanda ke nufin duk bayanan da ke cikin jeri za su ɓace kuma duk tsarin ya kasa aiki idan ɗayan tafiyar ya kasa.

Raid 0 yana ba da babban aiki kuma ba sama saboda ikon daidaito amma bai ba da komai ba. Mafi kyawun amfani lokacin da sauri yana da mahimmanci kuma amintacce shine na biyu.

RAID 1. Ya ƙunshi mirroring; bayanan da aka rubuta iri daya zuwa nau'i-nau'i na tafiyarwa. Ta hanyar ƙirƙirar "madubin saiti", RAID 1 na iya ba da haƙuri na kuskure: jeri ya ci gaba da aiki muddin aƙalla motar ta na aiki (ma'ana tsarin har yanzu yana iya samun damar bayanai daga ragowar diski). Sauya disk mara kyau tare da sabo zai kwafa bayanai zuwa gare shi, kuma sake gina tsararru.

RAID 1 yana ba da haɓaka cikin saurin aikin karantawa, amma ba a rubuce ba; yana da storagearfin ajiyar ajiya mai amfani tunda, saboda duk bayanan an rubuta sau biyu, kawai rabin adadin ƙarar motar yana samuwa. Mafi kyawun lokacin rashi bayanan bayanai da aminci suna da mahimmanci.

RAID 5. Ya ƙunshi yin yawo tare da rarrabuwa; yana buƙatar aƙalla masarufi 3 don aiki. Bayan gazawar guda ɗaya, ana iya lasafta karatun na gaba daga daidaitaccen rarraba, yana hana bayanai daga asara.

RAID 5 shine mafi kyawun zaɓi a yanzu kamar yadda yake ba da sauri (tunda ana samun bayanai daga fayafai da yawa) da kuma babban abin dogaro, saboda haka ana ɗaukarsa ɗayan tsare tsare masu aminci. Mafi kyawun amfani da fayilolin fayil da aikace-aikacen waɗanda ke da iyakantaccen adadi na bayanan bayanai.

RAID 6. Ya ƙunshi tsiri tare da rarrabuwa biyu; RAID 6 yana buƙatar aƙalla direbobi 4 kuma yana samar da mafi girman aiki tare da ingantaccen abin dogaro yayin da yake amfani da ƙarin ƙarin toshiyar parity. Bayar da ƙimar karantawa, amma aikin rubutu ya fi na RAID 5 jinkiri.

Rarraba biyu yana tabbatar da haƙuri har zuwa gazawar da aka kasa biyu - wanda ke sa manyan rukunin RAID su zama masu amfani, musamman don tsarin wadatarwa mai yawa (kodayake gazawar tuki na iya shafar kayan aiki). Mafi dacewa don babban adana fayil ko / da sabobin aikace-aikace.

karshe

Aiki na RAID tsararru na iya zama da taimako ƙwarai a cikin yanayi da yawa, saboda yana biyan buƙatu da yawa a cikin farashi mai sauƙi kuma abin dogaro, mafi mahimmanci daga cikinsu shine yiwuwar hana keɓaɓɓen bayananku ko mahimmancin kasuwancinku ɓacewa saboda katsewar wutan lantarki, gazawar tuki, ko wasu hadurran da ba za ku iya magance su ba.

Game da marubucin 

Imran Uddin

Imran Uddin ƙwararren mai rubutun ra'ayin yanar gizo ne daga Indiya da kan All Tech Buzz, yana rubutu game da Blogging, Yadda ake tukwici, Samun kuɗi akan layi, da dai sauransu.


{"email": "Adireshin imel ba daidai ba ne", "url": "Adireshin gidan yanar gizo ba shi da inganci", "required": "Filin da ake buƙata ya ɓace"}