Bvuta Array - nekugadzirisa matambudziko pamwe iverengwe / nyora nokukurumidza uye rakavimbika wegadziriro

Bvuta kuko - iri wandei kungoreva akazvimiririra Zvifambiso, ayo interconnected ne migero uchishanda panguva zvakakwana kumhanya. The Hurongwa anotora kushamwaridzana ichi sezvo rimwe dhisiki kuko. Managing kugovera kuverenga uye kunyora muitiro riri kuitwa controller.

Bvuta kuko rinoshandiswa kuti maximize kurekodha nokukurumidza kana rakavimbika dhisiki okuchengetera. Kugadzirisa Nyaya idzi dzinogona yekudyidzana kuvandudza zvinonyatsorehwa kunyatsoshanda yose yezvinhu.

Pakutanga, kusika bvuta-siyana kunosanganisira pooling pamusoro chipa Disks. Muchirongwa ichi chainyatsoratidza iri rokuti (ane chidimbu zvinoreva zvinotevera: "Array wandisa pamusoro chipa Disks"). Asi zvino, zvigadzirwa ichi chakava unhu uye yakavimbika, kushandurwa. Modern bvuta kuko akasikwa, ave mutemo, pahwaro zvokushandisa nokururamisira zvinodhura. Izviwo, iri zvakare zvinoratidzwa rokuti (zvino rinomirira "wandisa Array kuti Independent Disks").

Kukura kuva vanhu mashoko kunetseka kwazvo zvinodiwa kuti kuisa mberi kuti Hardware, kusanganisira mashoko zvitoro. Naizvozvo, sokuvapo bvuta-siyana akasikwa, mave dzakasiyana podtehnology, zvakanga okurega anyorere zvakananga compartmentalized mabasa.

All siyana matambudziko kugadziriswa makombiyuta kunoda siyana zvikuru zvigadzirwa mhinduro. Types bvuta arrays:

• Bvuta-0. In nyore Implementation inoda Zvifambiso maviri. Info kuuya kutsikisa chikwata Anovhura vose Zvifambiso. Reading kunosanganisira neizvi muitiro. Izvi zvinooneka ukurumidze zvinyorwa, asi haripi kuvimbwa yakakwana, nekuti chikanganiso rimwe discs kunotungamirira kurasikirwa umboo iri yose hondo.
• Bvuta-1. In nyore Implementation inoda Zvifambiso maviri. Mashoko pamusoro discs zvakanyorwa pamusoro pavo zvizere. Izvi DZEMUNHU DZINODZORA kurekodha muitiro, asi nokuda kumhedziso redundancy kunopa refu azvipire rakavimbika. The chikuru mukana chiitiko ichi - mukuru kuwanikwa nokutsanya iverengwe (nekuti zvichibvira kuverenga kubva Zvifambiso maviri panguva imwe chete).
• Bvuta-5. A mhosva-bvumidza nguvo. In nyore Implementation, unofanira kuva disks matatu. Chero mashoko kutsikisa kunoitika nokuputsa date parukova kupinda inoperera, imwe neimwe iyo akatumirwa kune checksum. In zvinoitirwawo mashoko sokurasikirwa rimwe discs, unogona ovadzorera kushandisa checksums hwakanyorwa mumwe. Recovery kunoda yavaive hombe okuita, saka vazhinji Implementation ichi rinoshandiswa musi Server Hardware.

Bvuta kuko wechishanu Kuzadziswa ndicho. Izvi imhaka rakavimbika uye kumhanya kubudiswa mashoko, sezvo rimwe siyana zvinogona kuitwa panguva imwe chete dzakawanda akazvimirira pezvakaitwa achinyora uye kuverenga mashoko.