Momwe DSQL imatsimikizira kuti zotsatizana zimakula

DSQL imawonetsetsa kuchuluka kwa magawo m'malo omwe amagawidwa posiya kugwirizanitsa kwachikhalidwe chamtundu umodzi m'malo mokomera kugawika kwamitundu yosiyanasiyana komanso kupanga ma ID oyendetsedwa ndi mgwirizano - kuchotsa zopinga popanda kusiya kusiyanasiyana. Kumvetsetsa momwe izi zimagwirira ntchito ndikofunikira pagulu lililonse lomwe likumanga mapulogalamu otengera deta omwe akuyenera kukula popanda kugunda denga lopweteka la zomangamanga.

Kodi Ma Database Sequence ndi Chifukwa Chiyani Amaphwanya Pamlingo?

Kutsatizana munkhokwe yolumikizana ndi kauntala yomwe imapanga manambala apadera, osankhidwa - omwe amagwiritsidwa ntchito kwambiri pamakiyi oyambira. M'dziko la seva imodzi, izi ndi zazing'ono: node imodzi imakhala ndi kauntala, imakulitsa ma atomu, ndikupereka mtengo kwa aliyense amene wafunsa. Chosavuta, chodalirika, komanso chosatheka kukhalabe ndi moyo mukangowonjezera nodi yachiwiri.

Vuto limawonekera mukangogawa database yanu m'malo angapo kapena zigawo. Node iliyonse yomwe ikufunika mtengo watsopano wotsatizana iyenera kugwirizanitsa ndi akuluakulu apakati kuti atsimikizire kuti palibe node ziwiri zomwe zimapereka nambala yomweyo. Pansi pa katundu wopepuka, kugwirizanitsa kumeneko sikuwoneka. Pansi pa katundu wolemetsa - mamiliyoni oyika pa sekondi iliyonse m'magulu am'malo omwe amakhala - olamulira apakati amakhala chokopa chomwe chimasokoneza njira yanu yonse yolembera.

Mainjini azosungira zakale amaphatikiza izi ndi njira zogwirira ntchito: zosamvetseka/ngakhale kugawa pa node, kugawa pamanja kagawo, kapena kusiya kutsata kwathunthu kwa ma UUID. Kuyang'ana kulikonse kumabweretsa zovuta zogwirira ntchito, kupereka zitsimikizo zoyitanitsa, kapena kusinthanitsa vuto limodzi ndi lina. DSQL imatenga njira yosiyana kwambiri.

Kodi DSQL Imagwiritsira Ntchito Bwanji Range Allocation Kuchepetsa Kugwirizana?

Chidziwitso chachikulu chakutsata kutsata kwa DSQL ndikuti ma node safunikira kugwirizanitsa pamtengo umodzi - amangofunika kugwirizanitsa pamagulu. M'malo moti choyika chilichonse chiyambitse ulendo wobwerera kudera lapakati, mfundo iliyonse imanena kuti manambala angapo amatsatizana patsogolo ndikuwapereka komweko mpaka chipikacho chitatheratu.

Njira iyi, yomwe imadziwika kuti kugawa kwamitundu kapena kusungitsa magulu, imachepetsa kwambiri kuchuluka kwa zochitika zolumikizana. Node yomwe imanena zamitundu yosiyanasiyana ya 1,000 imalowa m'malo mwa maulendo 1,000 olumikizana ozungulira ndi amodzi. Masamu owerengera amawonekera nthawi yomweyo: kutsatizana kumasiya kukhala cholepheretsa ndipo kuwerengera kapena kusungirako kumakhala denga lenileni m'malo mwake.

"Cholinga cha mapangidwe otsatizana sikupangitsa kuti kugwirizanitsa kukhale kofulumira - ndikupangitsa kuti kugwirizana kusakhale kosowa. DSQL imapindula kwambiri osati mwa kufulumizitsa botolo, koma kuchotsa mwadongosolo kufunikira kwake."

Node ikatha, imapempha chipika chatsopano. Node ikasokonekera pakati, zikhalidwe zomwe sizinagwiritsidwe ntchito zimangolumphidwa - DSQL imalekerera mipata motsatizana chifukwa chotsimikizika chotsimikizika chimafunika kuposa kupitiliza kotsimikizika. Malingaliro amakono ogwiritsira ntchito pafupifupi safuna kutsata kopanda malire; zimafuna kuti pasakhale mizere iwiri yogawana kiyi yofanana.

Kodi Kugwirizana Kwamagawo Kumagwira Ntchito Yanji mu Chitetezo Chotsatira?

Kugawika kwamitundu kumathetsa kuchulukirachulukira, koma kumadzetsa vuto linanso: kuletsa ma node awiri kuti asatchule mitundu yofanana nthawi imodzi. Apa ndipamene ma protocol ogwirizana omwe amagawidwa - omwe nthawi zambiri amasiyana a Paxos kapena Raft - amakhala ofunikira kwambiri pazotsimikizira zolondola za DSQL.

Node iliyonse isanayambe kutulutsa zikhalidwe kuchokera kumtundu watsopano, kugawa kwamtunduwu kuyenera kuperekedwa kudzera mugawo logwirizana. Mamembala ambiri amgulu akuyenera kuvomereza kusungitsa malo omwe apempha asanapitirire. Izi zimatsimikizira kuti ngakhale pakakhala magawo a netiweki, kulephera kwa ma node, kapena kufunsira nthawi imodzi, palibe nodi ziwiri zomwe zimagwira ntchito kuchokera kumagawo otsatizana.

Chotsatira chothandiza ndi dongosolo lomwe limapereka zitsimikizo zotsatizana za ndondomeko yamtundu umodzi wamtundu umodzi pamene akuthandizira zolemba zopingasa za zomangamanga zogawidwa. Mapulogalamu amawona zozindikiritsa zapadera, zopanda mikangano popanda kufunikira kudziwa chilichonse chokhudza cluster topology yomwe imawapanga.

Ndi Njira Zotsatizana Zotani Zomwe DSQL Imaphatikiza Kuti Muthe Kupititsa Patsogolo?

Njira ya DSQL yochulukirachulukira si njira imodzi koma kuphatikiza njira zowonjezera:

• Kusungitsa ma batch: Ma Node amatengera midadada yotsatizana kupyola mugawo logwirizana, kuchepetsa kulumikizana pafupipafupi potengera kukula kwake.
• Zowerengera zokumbukira m'deralo: M'malo osungika, mindandanda yotsatizana imaperekedwa kuchokera ku kauntala ya atomiki yapafupi - palibe netiweki ya I/O yofunikira mpaka kuchuluka kwatha.
• Kutsatizana kwanthawi yayitali: Mawotchi omveka omangidwa kumagulu ambiri amalola kutsatizana mosalekeza kuti apulumuke zisankho za atsogoleri ndi zochitika zomwe zalephereka popanda kuseweretsanso kulumikizana kwazinthu zomwe zidatulutsidwa kale.
• Gap tolerance by design: Dongosololi limavomereza momveka bwino mipata yobwera chifukwa cha michira yosagwiritsidwa ntchito kuchokera kumalo osweka, kuchotsa kufunikira kwa malingaliro ovuta obwezeretsa omwe angayambitsenso kulumikizana.
• Kukula kosinthika: Pansi pa zolemba zambiri, DSQL imatha kukulitsa kukula kwa magawo omwe aperekedwa kuti zochitika zolumikizana zikhale zosowa kwambiri pamene zofuna za magwiritsidwe ntchito zikukulirakulira.

Palimodzi, njirazi zimapanga injini yotsatizana yomwe imayenda mopingasa ndi gulu - kuwonjezera ma node kumawonjezera kuchulukana kwanthawi zonse m'malo mopanga opikisana nawo ambiri pa bajeti yolumikizana yokhazikika.

Kodi Sequence Model ya DSQL Imakhudza Bwanji Kamangidwe ka Ntchito?

Kwa omanga, makulitsidwe otsatizana a DSQL ali ndi tanthauzo lachindunji pa momwe mapulogalamu amayenera kupangidwira. Popeza kuti manambala amatsatana amalola kuti pakhale kusiyana, malingaliro ogwiritsira ntchito sayenera kuganiza kuti ma ID otsatizana amatanthauza zochitika zotsatizana. Mfundo zotsatizana zomwe zimadalira ma ID otsatizana, mwachitsanzo, akuyenera kugwiritsa ntchito mizere yolowera m'malo motengera masamu.

Kumbali yabwino, kutsatizana kwa DSQL kumakhalabe kokhazikika mkati mwa node imodzi yomwe yagawika, zomwe zikutanthauza kuti kuyika dongosolo mkati mwa gawo kumasungidwa. Uwu ndi mwayi wopindulitsa kwambiri kuposa njira zozikidwa pa UUID, pomwe kuyitanitsa malexicographic kumasinthidwa kuchoka pa nthawi yoyika - zomwe zimapangitsa kugawika kwa index, malo osungidwa bwino, ndi kutsika kwamafunso osiyanasiyana pamlingo.

Kwa magulu a mainjiniya omwe ali ndi nsanja zovuta, zopangira zinthu zambiri, kumvetsetsa kwazinthu izi pamlingo wa zomangamanga kumamasulira molunjika m'mapangidwe abwino kwambiri a schema, magwiridwe antchito odziwikiratu, komanso zodabwitsa zochepa pomwe kuchuluka kwa data kukukula.

Mafunso Ofunsidwa Kawirikawiri

Kodi DSQL imatsimikizira kuti manambala amatsatana nthawi zonse?

Ayi - DSQL imalekerera mipata motsatizana. Node ikaphwanyidwa isanathe kuthera nthawi yomwe idaperekedwa, mfundozo zimasiyidwa m'malo mobwezeredwa. Mapulogalamu ayenera kuona madongosolo a DSQL ngati apadera komanso akuwonjezeka mokhazikika mkati mwa gawo, koma musaganize kuti kusiyana pakati pa ma ID awiri oyandikana ndi amodzi ndendende.

Kodi matsatidwe a DSQL angagwiritsidwe ntchito m'madera ambiri?

Inde. DSQL's range allocation model imadziwika ndi dera ndi mapangidwe. Chigawo chilichonse chikhoza kukhala ndi mindandanda yakeyake, ndi mgwirizano womwe umapangitsa kuti dziko lonse likhale lapadera m'madera onse omwe akutenga nawo mbali. Zotsatira zake ndi kutulutsa katsatidwe kamene kamakhala kochepa kwambiri koletsa mikangano yapadziko lonse - popanda kufunikira maulendo ozungulira madera pakuyika kulikonse.

Kodi DSQL imagwira bwanji ntchito yotopa ngati kuchuluka kwa data kumafika mizere mabiliyoni?

Kutsatizana kwa DSQL nthawi zambiri kumatanthauzidwa ndi 64-bit integer ranges, kupereka denga mu quintillions - mopanda malire pa ntchito iliyonse yeniyeni yopangira. Kwa magulu omwe afika pachiwopsezo, DSQL imathandiziranso njira zazikuluzikulu zophatikizika ndi magawo otsatizana a mayina omwe amagawa malo a ID pamadomeni omveka bwino, kulepheretsa kauntala iliyonse kukhala yodetsa nkhawa kwa nthawi yayitali.

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