Thaum siv Aggregator hloov pauv, koj yuav tsum kuaj xyuas pab pawg raws li cov txiaj ntsig rov qab txhua kab los ntawm ua kev sib sau ua ke ib los ntawm ib qho thiab hla mus rau cov kav dej. Yog tias tsis muaj pawg los ntawm kev txheeb xyuas, kab kawg yuav raug ua tiav thiab nws yuav rov qab tsuas yog ib kab (kab kawg) vim nws tsis muaj lus txib kom sau cov ntaub ntawv.
Yuav ua li cas koj thiaj li tau txais cov ntaub ntawv thawj zaug thiab zaum kawg uas siv kev sib sau ua ke?
Los ntawm kev siv kev hloov pauv hloov pauv, ua ntej thiab zaum kawg kev sib sau
- Jitendra. Teb rau: Aug 23, 2013.
- Koj tuaj yeem tau txais Thawj & kawg Cov Ntaub Ntawv los ntawm Rank T / R bcz hauv Rank T / R nws yuav lim cov lej thiab cov ntaub ntawv.
Puas yog aggregator a transformation?
Aggregator transformation is an active transformation Thiab nws yog siv los ua kev suav ntawm cov ntaub ntawv xws li suav, qhov nruab nrab, suav, thiab lwm yam. kab cov ntaub ntawv nyob rau hauv lub aggregate cache. … Peb tuaj yeem siv cov nqe lus raws cai los lim kab.
Yuav ua li cas sib sau ua ke kev hloov pauv txhim kho kev ua tau zoo?
Siv cov lus qhia hauv qab no txhawm rau txhim kho qhov ua tau zoo ntawm kev hloov pauv Aggregator:
- Pab los ntawm kab lus yooj yim.
- Siv sorted input.
- Siv incremental aggregation.
- Lim cov ntaub ntawv ua ntej koj sau nws.
- txwv kev sib txuas chaw nres nkoj.
Yuav ua li cas kom tau txais cov ntaub ntawv kawg hauv cov ntaub ntawv xov xwm?
Yuav ua li cas kom tau txais thawj zaug thiab zaum kawg cov ntaub ntawv los ntawm lub rooj / cov ntaub ntawv? Kev daws: Kauj Ruam 1: Nag thiab tso cov chaw nres nkoj los ntawm qhov chaw tsim nyog rau ob qib kev hloov pauv. Kauj Ruam 2: Tsim ib lub tshuab hluav taws xob rov siv tau rov qab siv tau pib tus nqi pib 1 thiab txuas tus nqi tom ntej rau ob qho kev hloov pauv qib.
