FREESPACE(CI-feem pua, CA-feem pua) qhia meej feem pua ntawm txhua lub sijhawm tswj thiab tswj cheeb tsam uas yuav tsum tau muab tso tseg ua qhov chaw dawb thaum pawg thawj zaug thauj, thaum lub sij hawm ib tug loj ntxig, thiab tom qab ib tug sib cais ntawm kev tswj ncua sij hawm (CI-feem pua) thiab tswj cheeb tsam (CA-feem pua).
Kev siv Freespace hauv KSDS yog dab tsi?
Qhov chaw pub dawb txhim kho kev ua tau zoo los ntawm kev txo qis qhov tshwm sim ntawm kev tswj lub sijhawm thiab tswj cheeb tsam sib cais. Qhov no, nyob rau hauv lem, txo qhov muaj feem ntawm VSAM tsiv ib txheej ntawm cov ntaub ntawv mus rau ib tug txawv lub tog raj kheej deb ntawm lwm cov ntaub ntawv nyob rau hauv lub ntsiab ntu ntu.
Pib pawg hauv VSAM yog dab tsi?
Lub hauv paus pawg muaj ntawm cov ntaub ntawv tivthaiv thiab qhov ntsuas qhov ntsuas rau thawj qhov ntsuas ntawm KSDS. … Qhov Alternate Index yog dab tsi? AIX yog ib cov ntaub ntawv uas tso cai rau kev nkag mus rau VSAM cov ntaub ntawv los ntawm tus yuam sij uas tsis yog qhov tseem ceeb.
Qhov chaw dawb hauv mainframe yog dab tsi?
Re: Qhov chaw dawb
Ntawm lub ntsiab, "qhov chaw dawb" hais txog rau qhov chaw tsis siv ntawm lub pob disk. Yog li yog tias 3390 mod 3 nrog 3, 335 lub tog raj kheej ntawm nws muaj 17 cov ntaub ntawv teeb tsa uas tag nrho 2, 235 lub tog raj kheej ntawm qhov chaw faib tawm ces qhov chaw dawb yuav yog 1, 100 lub tog raj kheej - rau lub pob ntawd.
peb hu ua VSAM KSDS file?
Kev tshaj tawm. KSDS hu ua Key Sequenced Data Set. Cov ntaub ntawv tseem ceeb-sequenced set (KSDS) yog qhov nyuaj dua li ESDS thiab RRDS tab sis muaj txiaj ntsig thiab ntau yam. Peb yuav tsum codeINDEXED hauv DEFINE CLUSTER hais kom ua rau KSDS datasets.
