Lub koom haum cov ntaub ntawv thiab cov ntaub ntawv yog dab tsi?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

Lub koom haum ua ntaub ntawv yog hais txog kev sib raug zoo ntawm ntau cov ntaub ntawv uas tsim cov ntaub ntawv , tshwj xeeb tshaj yog hais txog kev txheeb xyuas thiab nkag mus rau ib qho ntaub ntawv tshwj xeeb. Hauv cov ntsiab lus yooj yim, Khaws cov cov ntaub ntawv nyob rau hauv tej yam kev txiav txim yog hu ua file Organization.

Yog li ntawd, lub koom haum cov ntaub ntawv yog dab tsi thiab hom ntaub ntawv koom haum?

Qhov tseeb, koom haum ua ntaub ntawv yog siv los piav qhia txog yuav ua li cas cov ntaub ntawv tshwj xeeb hauv ib ntaub ntawv yog muab tso rau hauv nws thiab nkag tau raws li xav tau. Txawm tias ntau hom ntaub ntawv koom haum yog tam sim no nyob rau hauv kev siv, qee qhov nrov tshaj plaws yog sequential, indexed thiab txheeb ze koom haum.

Tsis tas li ntawd, lub koom haum serial file yog dab tsi? Lub koom haum Serial Hom no koom haum ua ntaub ntawv txhais tau hais tias cov ntaub ntawv nyob rau hauv tsis muaj kev txiav txim thiab yog li ntawd mus retrieve ib zaug xwb cov ntaub ntawv tag nrho ntaub ntawv yuav tsum tau nyeem los ntawm kev thov kom kawg. Serial lub koom haum feem ntau yog cov txheej txheem siv los tsim cov ntaub ntawv Transaction (unsorted), Ua haujlwm thiab cov ntaub ntawv pov tseg.

Ib yam li ntawd, cov koom haum ua ntaub ntawv yog dab tsi?

Hom ntaub ntawv koom haum yog raws li nram no:

• Sequential file organization.
• Heap file organization.
• Hash file organization.
• B+ ntaub ntawv koom haum.
• Indexed sequential access method (ISAM)
• Cluster file organization.

Lub koom haum txawv li cas?

Hom . Muaj ntau yam kev cai lij choj hom koom haum , suav nrog cov tuam txhab, tsoomfwv, tsis yog tsoomfwv cov koom haum , kev nom kev tswv cov koom haum , thoob ntiaj teb cov koom haum , cov tub rog, cov koom haum pab txhawb nqa, cov koom haum tsis muaj txiaj ntsig, kev sib koom tes, kev koom tes, thiab cov tsev kawm ntawv.