Video: Yuav ua li cas koj txo skew hauv Teradata?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Rau zam skewness , sim xaiv qhov Primary Index uas muaj ntau qhov tshwj xeeb raws li qhov ua tau. PI kab xws li lub hli, hnub, thiab lwm yam. yuav muaj qhov tshwj xeeb tsawg heev. Yog li thaum cov ntaub ntawv faib tsuas yog ob peb amps yuav tuav tag nrho cov ntaub ntawv uas tshwm sim skew ua.
Sib tham, dab tsi yog skew hauv Teradata?
Skewness nyob rau hauv Teradata . Txhais. Skewness yog cov lus txheeb cais, uas yog hais txog kab kev faib tawm ntawm AMPs. Yog hais tias cov ntaub ntawv yog skewed heev, nws txhais tau hais tias ib co AMPs muaj ntau kab thiab ib co tsawg heev piv txwv li cov ntaub ntawv tsis zoo / sib npaug. Qhov no cuam tshuam rau kev ua haujlwm / Teradata yog kev sib piv.
Tsis tas li ntawd, Table skew yog dab tsi? Cov Rooj Skew dialog tshawb nrhiav cov ntaub ntawv hauv qhov system uas muaj cov ntaub ntawv tsis sib xws (lossis skew ua ) raws li kev sib kis. Cov ntaub ntawv hlais thiab SPUs uas tswj lawv dhau los ua kev ua haujlwm tsis zoo rau koj cov lus nug. Tsis sib npaug ntawm cov ntaub ntawv hu ua skew ua . Qhov zoo rooj faib tsis muaj skew ua.
Raws li, CPU skew hauv Teradata yog dab tsi?
CPU skew tshwm sim thaum txoj haujlwm los ua cov lus nug tsis raug faib sib npaug ntawm cov ntu. Cov CPU metric yog qhov nruab nrab ntawm qhov CPU feem pua siv los ntawm txhua tus txheej txheem ua cov lus nug.
AMP yog dab tsi hauv Teradata?
DEFINITION. AMP , acronym rau "Access Module Processor," yog hom vproc (Virtual Processor) siv los tswj cov ntaub ntawv, tuav cov ntaub ntawv ua haujlwm thiab thiab tswj cov disk subsystem hauv ntau qhov ua haujlwm thiab muaj peev xwm ua haujlwm sib luag ntawm qhov Teradata Database.
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