Ahịa-nkesa technology

ahịa-nkesa technology na-enye abụọ nọọrọ onwe ha inwe mmekọrịta Filiks - ihe nkesa na-na inweta, njikọ dị n'etiti ha a na netwọk.

Servers na-akpọ usoro maka nkwado nke nchekwa data na faịlụ usoro, na ndị ahịa - na Filiks na-eziga arịrịọ ma chere maka a nzaghachi site na ihe nkesa.

Client-nkesa nlereanya na-eji na iwu usoro ọmụma nhazi na ndabere nke nchekwa data, nakwa dị ka ndị ozi nzi usoro. E nwere ndị na-akpọ file-nkesa ije na bụ nnọọ iche na ahịa-nkesa.

Data na faịlụ nkesa usoro echekwara na a file nkesa (Novell NetWare ma ọ bụ WindowsNT Server), na ha na-esichara site na ime ihe nke workstations "desktọọpụ database", dị ka Access, Nsogbu, FoxPro, wdg

Database emi odude ke workstation, na data mkpachapụ rụrụ site ọtụtụ onwe ya ma uncoordinated usoro. All data otú ebute site ná a netwọk nkesa na workstation, nke slows ala ọsọ nke ozi nhazi.

ahịa-nkesa technology na-emejuputa atumatu ịrụ ọrụ nke abụọ (dịkarịa ala) ngwa - ahịa na sava nke na-eso ndị ọrụ n'etiti ha. Maka nchekwa na kpọmkwem mkpachapụ nke data nkesa emegharị, ihe atụ nke nke nwere ike ịbụ SQLServer, Iha, Sybase, na ndị ọzọ.

The ọrụ interface na-enye a ahịa dabeere ewu nke nke na-eji pụrụ iche ngwaọrụ ma ọ bụ nelu ihuenyo database. Ezi uche data nhazi na-gburu obere na ndị ahịa, na obere na a nkesa. Na-eme ka a arịrịọ ka nkesa na-rụrụ site ahịa, na-emekarị na SQL asụsụ. Natara arịrịọ esichara site nkesa na ahịa (s), na n'ihi na-laghachi.

The data na-esichara na otu ebe ebe ha na-echekwara - na ihe nkesa, otú a nnukwu ego nke ha na-adịghị zitere gafee netwọk.

The uru nke a ahịa-nkesa ije

ahịa-nkesa technology na-eweta ozi dị mma usoro:

• pụrụ ịdabere

Data mgbanwe a rụrụ nchekwa data nkesa na iji na azụmahịa usoro na-enye nchịkọta Njirimara ndị dị otú arụmọrụ dị ka: 1) atomicity, nke na-enye data ike n'ezi maka ọ bụla azụmahịa enwezu; 2) onwe nke azụmahịa nke dị iche iche ọrụ; 3) uta ndidi na - azọpụta pụta nke azụmahịa.

• Scalability, ie, System ike bụ na ọ bụghị na ọnụ ọgụgụ nke ndị ọrụ na ego nke ọmụma na-enweghị na-agbanwe agbanwe software eji.

ahịa-nkesa technology na-akwado ọtụtụ puku ndị ọrụ na gigabytes nke ozi kwesịrị ekwesị ngwaike n'elu ikpo okwu.

• Security, ie, pụrụ ịdabere na data nchedo site n'enweghị ikike ohere.
• Mgbanwe. Na ngwa na-arụ ọrụ na-data, igbunye ezi uche n'ígwé: a ọrụ interface; iwu nke mgbagha nhazi; data management.

Dị ka e kwuworo, a file-nkesa technology, ha atọ n'ígwé na-jikọtara otu monolithic ngwa na-agba ọsọ na a workstation, na mgbanwe nile na n'ígwé abụrụ na-edu a mgbanwe nke ngwa, nsụgharị dị iche iche nke ahịa na ihe nkesa, na na ị chọrọ na-ebu software upgrades na niile workstations .

Client-nkesa technology na a abụọ-EBIONITISM ngwa na-enye niile na ọrụ e guzobere nke onye ọrụ interface na ahịa, na niile na ọrụ nke ozi database management - na a na ihe nkesa, a azụmahịa na-achị nwere ike ime eme ma ndị nkesa na ahịa.

Atọ-larịị ngwa na-enye ohere onye n'etiti larịị, nke implements azụmahịa iwu, nke bụ ihe ndị kasị agbanwe mmiri.

Multiple etoju ekwe mgbanwe, na-eri-irè imeghari ẹdude ngwa mgbe niile updatable azụmahịa chọrọ.