Rarraba databases

Tarwatsa, ko, idan shi ne daidai kira, rarraba database - yana da irin wannan database, wanda ya hada da wani yawan kwamfutocin da alaka da wani cibiyar sadarwa, kowane daga wanda aiki a gida database. A totality of duk wadannan software da kuma hardware Halicci Shared database. Rarraba database waje look kamar talakawa na gida database, da hardware disposition ba su da bayyane ga masu amfani. Rarraba kula da tsarin iko da dukan ajiya nodes da kuma samar da bayanai connectivity.

Kristofer Deyt, da aka sani database gwani na duniya shahararru, ya gano goma sha biyu main siffofin da ya kamata da duk rarraba databases: 1) gida cin gashin, 2) ci gaba da aiki, 3) m nodes, 4) m fragmentation, 5) da nuna gaskiya da wuri, 6) sarrafa takamaiman queries, 7) m kwafi, 8) mai zaman kanta da kayan aiki, 9) rarraba ma'amala aiki, 10) cibiyar sadarwa nuna gaskiya, 11) mai zaman kanta da tsarin aiki 12) mai zaman kanta da aka zaba databases.

Ka yi la'akari da babban halaye da cewa, bisa ga Data, zã mu yi duk rarraba bayanai, a cikin mafi daki-daki.

Local cin gashin yana nufin cewa kowane naúrar da kansa da kulawa da data daga karkashi.

Ci gaba da aiki. A wannan lokaci K. Kwanan aka ce cewa daman amfani da data kamata a bayar ci gaba, da kuma la'akari da ko suna located a wani kumburi. Har ila yau, shi ya kamata ba kome cewa wani aiki ne da za'ayi a lokacin da gida database.

Independent nodes. A wani manufa tsarin, duk nodes ne daidai da m na juna. Kowane database is located a kan kumburi kai data a wani shared sarari tare da wannan hakkin. All databases cewa yin up a rarraba database, kai dauke da kuma kariya daga samun dama marar izini.

M fragmentation. Wannan fasalin bukatar da ciki database goyon bayan rarraba jeri na data cewa su ne a gaskiya daya.

wuri nuna gaskiya. Masu amfani wanda damar a rarraba bayanai, ya kamata su san wani abu game da abin da kumburi ne jiki samuwa ga shi da bayanai da ake bukata.

Rarraba Tambaya Processing. A database dole ne tabuka rarraba queries a SQL samfurin.

M kwafi. A general, da wurare dabam dabam - shi ne canja wuri na canza abubuwa daga daya database zuwa wani. A cikin mahallin da wannan abu da ake nufi da canja wurin bayanai tsakanin nodes a hanyoyi da tabbatar da invisibility daga wadannan ayyuka zuwa ga mai amfani.

Hardware 'yancin kai na nufin cewa mashigar rarraba database cibiyar sadarwa za su iya aiki da wani kwamfuta model.

Processing na rarraba ma'amaloli da aka bi da matsayin hanya ga Ana ɗaukaka a rarraba database ta amfani da dokokin UPDATE, share, saka, a lokacin da kisan wanda bai rasa da mutunci da daidaito da bayanai da aka adana a cikin database.

Independence daga tsarin aiki kwakwalwa gaba da cewa tsarin da aka gyara da za a iya guje wani tsarin aiki.

Cibiyar sadarwa nuna gaskiya yana nufin cewa samun duk abubuwa na rarraba database na bukatar kawai na hanyar sadarwa.

Independence daga database. Wannan shi ne wani muhimmin alama na tsarin bukatar da ikon yin aiki tare da dukkan rarraba databases daga daban-daban da masu aiki, ciki har da damar da ya zama samuwa ga search kuma updates.

Kamar yadda zamu iya gani, da definition K. Data ga rarraba database bayyana shi a matsayin wani tsarin da rauni shaidu, kunsha da m nodes cewa suna gida databases. Wadannan m LBD, da kuma samar da damar yin rarraba databases daga daban-daban masu aiki. A nodes samar da wata alaka tsakanin suke replicable data. A topology na rarraba database Forms da Gwargwadon bayanai tsarin da kuma bayanan kwafi gudana.