Video: Puas yog SQL ib ntus lossis random?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
SQL Server Database - Kev Ua Haujlwm yog Random lossis Sequential hauv xwm
| Hom | Thaiv | Kev piav qhia |
|---|---|---|
| Ua ntu zus | 256k ua | Tej load |
| Random | 32k ua | SSAS Workload |
| Ua ntu zus | 1 MB | Thaub qab |
| Random | 64 K-256 K | Cov chaw kuaj mob |
Sib tham, sau sequential yog dab tsi?
Sequential sau yog ib qho kev nkag mus rau disk uas yog cov ntaub ntawv sib txuas loj ntawm cov ntaub ntawv tau sau rau qhov chaw nyob ib sab ntawm qhov chaw ntawm lub cuab yeej ntawm qhov tob ntawm ib qho. Lub sij hawm yog siv feem ntau nyob rau hauv cov ntsiab lus ntawm benchmarking thiab qhov ceev yog feem ntau ntsuas nyob rau hauv MBps.
Qhov thib ob, dab tsi yog sequential I O? Peb hu rau hom kev ua haujlwm no ib qho random I / O . Tab sis yog tias qhov thaiv tom ntej no tshwm sim ncaj qha tom qab yav dhau los ntawm tib txoj kev, lub taub hau disk yuav ntsib nws tam sim ntawd tom qab, tshwm sim tsis muaj sijhawm tos (piv txwv li tsis muaj latency). Qhov no, ntawm chav kawm, yog a raws li I/O.
Ua li no, random sau dab tsi?
Ib qho kev ntsuas ntawm ntau npaum li cas cov ntaub ntawv me tuaj yeem sau rau hauv ib lub cuab yeej. 4 K random sau yog tus qauv nkag disk uas me me (4K) cov ntaub ntawv tau sau rau random qhov chaw nyob ntawm qhov chaw ntawm lub chaw cia khoom ntawm ib kab qhov tob ntawm ib qho.
Random nyeem IOPS yog dab tsi?
IOPS . Stands rau "Input/Output Operations Per Second." IOPS yog ib tug metric siv los ntsuas rau kev ua tau zoo ntawm ib tug cia khoom los yog cia network. Txawm li cas los xij, nws kuj tseem tuaj yeem ntsuas cov txiaj ntsig tshwj xeeb, xws li sequential nyeem IOPS , sequential sau IOPS , random nyeem IOPS , thiab random sau IOPS.
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