Luso kasitomala-Seva

kasitomala-Seva luso amapereka awiri palokha zimavuta njira - Seva ndi kasitomala, kugwirizana nawo pa Intaneti.

Zatsabola amatchedwa njira udindo thandizo la Nawonso achichepere ndi dongosolo file, ndi makasitomala - njira kuti tumizani pempho akudikira kuti ayankhe kuchokera pa makina.

Kasitomala-Seva chitsanzo ntchito popanga dongosolo processing zambiri pa maziko a Nawonso achichepere, komanso dongosolo positi. Pali otchedwa file-Seva zomangamanga kuti n'chosiyana kwambiri kasitomala-Seva.

Data mu dongosolo file Seva kusungidwa pa file Seva (Novell NetWare kapena WindowsNT Server), ndipo kukonzedwa mwa mphamvu ya workstations ndi "Nawonso achichepere kompyuta", monga Access, Zodzitsutsa, FoxPro, etc.

Nawonso achichepere ili pa kaphatikizidwe kamakompyuta, ndipo deta mpheto anachita ndi angapo palokha ndipo uncoordinated ndondomeko. deta onse motero opatsirana pa makina maukonde kuti kaphatikizidwe kamakompyuta, amene kubweza liwiro processing zambiri.

kasitomala-Seva luso akuyendera kugwira ntchito kwa awiri (osachepera) ofunsira - makasitomala ndi maseva kuti kugawana ntchito pakati pawo. Pakuti yosungirako ndi mpheto mwachindunji wa Seva deta Yankho, chitsanzo cha zimenezi SQLServer, Oracle, Sybase, ndi ena.

The mawonekedwe wosuta amapereka kasitomala zochokera yomanga yomwe ntchito zipangizo zapadera kapena Nawonso achichepere kompyuta. Kukamba deta processing ndi kuphedwa mwina pa kasitomala, mwina pa makina a. Kupanga pempho makina imagwiridwa ndi kasitomala, kawirikawiri mu chinenero SQL. zopempha analandira kukonzedwa ndi makina ndi kasitomala (s), chifukwa amagwanso.

deta ndi kukonzedwa mu pamalo zasungidwa - pa makina, kotero wambirimbiri a iwo anatumiza kudutsa maukonde.

Ubwino wa zomangamanga kasitomala-Seva

kasitomala-Seva luso kumabweretsa mfundo zina khalidwe dongosolo:

• kudalilika

Data kusinthidwa imagwiridwa Nawonso achichepere Seva ntchito ndikupeleka limagwirira opatsa katundu akaphatikiza ntchito monga: 1) atomicity, amene amathandiza deta umphumphu kumulipiritsa anamaliza; 2) ufulu wa wotuluka wa owerenga osiyana; 3) zifukwa kulolerana - kupulumutsa zotsatira za iwowo.

• Scalability, ie, System mphamvu sadalira chiwerengero cha owerenga ndi kuchuluka kwa mfundo popanda kusintha mapulogalamu ntchito.

kasitomala-Seva luso amathandiza zikwi owerenga gigabytes zinthu zambirimbiri pa yoyenera hardware nsanja.

• Security, ie, odalirika chitetezo kafukufuku mwayi wosaloleka.
• Kusinthasintha. Mafomu kuti ntchito deta, kuonetsetsa zigawo zomveka: wosuta mawonekedwe; malamulo a processing mfundo; deta kasamalidwe.

Monga tanenera kale, luso file-Seva, zigawo zonse zitatu amaphatikizidwa mu limodzi ntchito monolithic kuti amayendera kaphatikizidwe kamakompyuta, ndipo kusintha onse zigawo kumawachititsa ndi kusinthidwa wa ntchito Mabaibulo osiyanasiyana kasitomala ndi makina, ndipo mukufuna kuchita kukweza pulogalamu pa workstations onse .

Kasitomala-Seva luso mu ntchito ziwiri gawo amapereka ntchito zonse mapangidwe a wosuta mawonekedwe pa kasitomala, ndi ntchito zonse za kasamalidwe mudziwe Nawonso achichepere - pa makina ndi bizinezi ulamuliro akhoza kukhazikitsa onse polumikiza ndi kasitomala.

Atatu mlingo ntchito limalola mlingo wapakatikati, yomwe zipangizo malamulo malonda, ndiwo zigawo zikuluzikulu kwambiri variable.

misinkhu angapo kulola kugawa mtengo-bwino atengere ntchito alipo amafuna ntchito zonse updatable.