Video: Qhov Performance index Elasticsearch yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv Elasticsearch , Cov Ntaub Ntawv yog qhov chaw tshawb nrhiav thiab qhov ntsuas . Ib qhov ntsuas muaj ib lossis ntau Cov Ntaub Ntawv, thiab Cov Ntaub Ntawv muaj ib lossis ntau daim teb. Hauv database terminology, Cov Ntaub Ntawv sib raug rau kab lus, thiab Field sib raug rau kab lus.
Tib neeg kuj nug, qhov ntsuas thiab hom hauv Elasticsearch yog dab tsi?
Yog li ntawd muaj ob lub tswv yim nyob rau hauv lub ntsiab txhais. Ua ntej, ib qhov ntsuas yog ib co hom ntawm cov ntaub ntawv koom haum mechanism, tso cai rau tus neeg siv los faib cov ntaub ntawv ib txoj kev. Qhov thib ob lub tswv yim hais txog replicas thiab shards, lub mechanism Elasticsearch siv los faib cov ntaub ntawv nyob ib ncig ntawm pawg.
Qhov thib ob, Kuv yuav tshawb xyuas qhov ntsuas hauv Elasticsearch li cas? Thaum koj tau noj qee cov ntaub ntawv rau hauv ib qho Elasticsearch Index , koj ua tau nrhiav nws los ntawm kev xa cov lus thov mus rau _search endpoint. Nkag mus rau tag nrho suite ntawm nrhiav muaj peev xwm, koj siv cov Elasticsearch Nug DSL los qhia qhov nrhiav cov txheej txheem hauv lub cev thov.
Kuj paub, Elasticsearch document yog dab tsi?
A ntaub ntawv yog JSON ntaub ntawv uas yog khaws cia rau hauv Elasticsearch . Nws zoo li ib kab hauv ib lub rooj hauv cov ntaub ntawv sib raug zoo. Daim ntawv qhia rau txhua daim teb muaj ib hom teb (tsis txhob totaub nrog ntaub ntawv type) uas qhia txog hom ntaub ntawv uas tuaj yeem khaws cia hauv qhov chaw ntawd, xws li integer, string, object.
Muaj pes tsawg qhov ntsuas tau Elasticsearch tuav?
Lucene ntu Shards yog ob qho laj thawj thiab kev faib lub cev ntawm ib qho qhov ntsuas . Txhua Elasticsearch shard yog Lucene qhov ntsuas . Cov ntaub ntawv ntau tshaj koj ua tau muaj nyob rau hauv Lucene qhov ntsuas yog 2, 147, 483, 519.
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