Ua ntej, O_APPEND lossis qhov sib npaug FILE_APPEND_DATA ntawm Windows txhais tau tias increments ntawm qhov siab tshaj plaws ntawm cov ntaub ntawv (cov ntaub ntawv "ntev") yog atomic nyob rau hauv cov neeg sau ntawv. Qhov no tau lees paub los ntawm POSIX, thiab Linux, FreeBSD, OS X thiab Windows tag nrho siv nws kom raug.
Puas sau ntawv Atomic?
Atomically sau rau hauv cov ntaub ntawv ntawm POSIX-raws li tshuab thaum khaws cia tso cai. Ntawm feem ntau Unix systems, mv yog kev ua haujlwm atomic. Qhov no ua rau nws yooj yim los sau rau cov ntaub ntawv atomically tsuas yog siv cov haujlwm mv. Txawm li cas los xij, qhov no yuav rhuav tshem cov kev tso cai ntawm cov ntaub ntawv qub.
Python puas sau Atomic?
Ib qho yooj yim snippet uas siv atomic sau siv Python tempfile. Cov ntaub ntawv temp yuav tsum nyob rau tib cov ntaub ntawv system raws li cov ntaub ntawv yuav tsum tau hloov. Cov cai no yuav tsis ua haujlwm zoo rau cov kab ke nrog ntau lub tshuab ua ntaub ntawv. Lub npe hu ua TemporaryFile xav tau ib qho dir=paramter.
Atomic sau dab tsi?
Piv txwv li, atomic nyeem / sau ua haujlwm. … Piv txwv li, thaum nkag los yog hloov ib qho cuab yeej yog atomic, nws txhais tau tias uas tsuas yog ib qho kev nyeem lossis sau ntawv tuaj yeem ua tau ib zaug. Yog tias koj muaj ib qho kev pab cuam uas nyeem cov cuab yeej atomically, qhov no txhais tau tias cov cuab yeej hloov pauv tsis tau thaum lub sijhawm nyeem ntawv no.
Puas Linux sau Atomic?
Txij li thaum sau ntawv mus rau cov ntaub ntawv ib txwm muaj feem ntau ua tiav ntawm kernel buffers thiab ua tiav cov ntaub ntawv raulub cev cia khoom yog yeej tsis yog atomic, cov xauv tsim nyog los muab cov kev lees paub no tsis tas yuav kav ntev.
