Saddex lakab oo kayd ah oo u dhexeeya xulashada iyo diskka
Saddex lakab oo kayd ah oo u dhexeeya xulashada iyo diskka Sahankan waxa uu u qaybsan yahay saddex, iyada oo la eegayo muhiimada iyo saamaynta uu yeelan karo. Fikradaha Muhiimka ah ayaa daboolay Nuxurkani wuxuu sahaminayaa: Mabaadi'da aasaasiga ah iyo aragtiyaha Dhaqan ahaan...
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Marka codsigaagu soo saaro bayaan Dooro, waydiintaasi weligeed ma taaban saxanka wareegta ama xitaa kaydinta fiilada ceeriin - waxay dhex martaa saddex lakab oo kayd ah oo si aamusnaan ah u go'aaminaya in jawaabtaadu ku imanayso microsecond ama millise seconds. Fahamka lakabyadan waa faraqa u dhexeeya meherad ganacsi oo si dedaalla'aan ah u miisaanaysa iyo mid ku xidhan culayska dhabta ah ee dunida.
Maxaa dhacaya xiliga ay su'aal-doorashadu ka baxdo codsigaaga?
Marka uu dalabkaagu soo diro waydiinta Doctor, waxa ay gashaa dhuumaha inta badan horumariyayaashu weligood ma eegaan. Matoorka kaydka xogta ayaa ka hortagaya codsiga ka hor intaysan dhicin I/O kasta, isaga oo u eegaya SQL qorshaha fulinta gudaha oo isla markiiba la tashanaya difaaciisa koowaad: kaydka natiijada weydiinta. Haddii su'aal isku mid ah oo leh halbeegyo isku mid ah la fuliyay dhawaan, matoorku wuxuu soo celin karaa natiijada la kaydiyay isagoon taaban hal bog oo xog ah. Tan waxa mararka qaarkood loo yaqaancache-ka su'aashaama natiijada khasnadda, iyo akhris-sare, qoraal-hooseeya culaysyo shaqo - sida dashboards-ka falanqaynta iyo qaybaha warbixinta - waxay meesha ka saari kartaa inta ugu badan ee akhriska gebi ahaanba.
geli, Cusbooneysii, ama Tirtir oo liddi ku ah shaxda hoose waxay burinaysaa natiijooyinka la kaydiyay. Tani waa sababta hababka wax kala iibsiga culus ee qorista ay inta badan u joojiyaan kaydka weydiinta oo dhan oo ay ku tiirsanaadaan lakabyada qoto dheer.
Waa maxay barkadda kaydka ah maxayse uga muhimsan tahay intaad u malaynayso?
Lakabka labaad ee kaydinta - oo lagu doodi karo kan ugu muhiimsan ee nidaamyada wax-soo-saarka - waabarkadda kaydinta(oo loo yaqaan kaydiyaha la wadaago ee PostgreSQL, barkada kaydinta InnoDB ee MySQL). Kani waa gobol RAM ka mid ah matoorka xog ururinta uu isticmaalo si uu u hayo bogag xogta dhawaan la helay. Marka su'aasha aan laga keeni karin khasnadda natiijada, matoorku waxa uu eegayaa in boggaga xogta loo baahan yahay ay hore u deggan yihiin barkadda kaydka ka hor inta aan la soo saarin wax akhris ah.
Barkadda kaydinta waxay ku shaqeysaa mabda'a ku meel gaar ah iyo meel bannaan: xogta dhowaan la helay waxay u badan tahay in mar kale la galo, iyo xogta lagu kaydiyay xogta la helay waxay u badan tahay in dhawaan la galo. Maamulayaasha kaydka xogtu waxay hagaajiyaan cabbirka barkada kaydinta sida mid ka mid ah go'aamada isku xidhka ugu sarreeya ee ay gaadhaan. Barkadda kaydinta oo aad u yar ayaa sababta bogga ka saarista joogtada ah, soo saarta ifafaale loo yaqaan thrashing, halkaas oo nidaamku ku bixiyo wakhti badan maaraynta kaydinta kaydka halkii uu fulin lahaa su'aalaha.Aragtida Furaha: Inta badan culaysyada shaqada ee OLTP, barkadda kaydka ee si fiican loo cabbiray waxay ka dhigan tahay 95-99% dhammaan xogta la akhriyo waxaa laga keenay RAM. Qalabka shaqada - qayb ka mid ah xogtaada ee su'aalaha badanaa taabto - badanaa aad ayay uga yar yihiin wadarta cabbirka xogta. Inaad cabbirto barkadda kaydintaada si ay ugu habboonaato shaqadaada, ma aha dhammaan xogtaada, waa tallaabada kaliya ee hagaajinta soo celinta ugu sareysa ee aad qaadi karto.
Sidee buu u buuxiyaa farqiga u dhexeeya RAM iyo diskka?
Xitaa marka kaydka kaydka kaydka ee kaydka kaydka ahi uu seego, waydiinta wali looma qorshayn akhrinta saxanka runta ah. Nidaamka hawlgalka waxa uu ilaaliyaabog cache(sidoo kale loo yaqaan cache filesystem), waa gobol RAM-ka kernel-maareeyo oo kaydiya waxna akhriya oo u qoraa si uu u xannibo aaladaha. Marka matoorka xog ururinta uu codsado bog ka maqan barkada kaydinta, OS kernel-ku waxa uu hubinayaa khasnadda boggiisa ka hor inta aanu soo saarin amarka I/O jirka ee kantaroolaha kaydinta.
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Start Free →Lakabkan saddexaad waa mid aan la arki karin soosaarayaasha arjiyada laakiin aad muhiim ugu ah nidaamyada halka kaydka kaydinta xogta aan la bixin. Kaydinta bogga OS waxa la wadaagaa dhammaan geeddi-socodyada oo dhan, si ay ula tartanto adeegahaaga codsiga, server-ka shabakadda, iyo software kasta oo ku shaqeeya isla martigeliyaha. Serveryada xog ururinta ee u go'an, tartankani waa mid aad u yar, iyo kaydka OS-gu waxa uu bixiyaa fursad labaad oo macno leh. Martigeliyaha la wadaago ama weelasha leh xaddidaadaha xusuusta adag, khasnadda OS aad ayuu u yaryahay inta badan si loo caawiyo.
Lakabkee Cache Ka Mas'uul Ka ah Guuleysiga ugu Badan ee Layliska?
Nidaamyada wax-soo-saarka-dhabta ah ee dunida, barkadda wax-soo-saarka ayaa u sarraysa natiijooyinka waxqabadka marka loo eego xad ballaaran. Waa kan sababta lakab kastaa si kala duwan ugu qayb qaato xaaladaha isticmaalka:- Natiijooyinka su'aasha: Faa'iidada ugu badan ee akhris-culus, inta badan xog-ururinta - wargelinta weydiimaha, dashboards-ka la kaydiyay, nuxurka guud ee dhammaadka. Wax aan faa'iido lahayn miisaska qoraalka-culus.
- Database buffer pool:Faraska shaqada caalamiga ah. Soosaar kasta oo xog ururin ah waa in marka hore halkan lagu hagaajiyaa. Waxay u qabataa qaababka gelitaanka random iyo taxanaha labadaba si hufan.
- Bogga khasnadda OS: Wuxuu bixiyaa shabagga badbaadada marka barkadda wax kaydisa la yareeyo. Sido kale si weyn ayey u caawisaa inta lagu guda jiro baaritaanada isdaba jooga ee miisaska waaweyn ee haddii kale ka saari kara boggaga kulul barkadda kaydinta.
- Khasiyaha kontoroolka kaydinta (lakabka qalabka):Lakabka afraad, oo inta badan la ilduufo - NVMe SSDs iyo kontaroolayaasha RAID waxay dusha sare ku hayaan kaydka qoritaanka batteriga ama kaydka tamarta. Tani waxay ilaalinaysaa adkeysiga iyada oo aan la hurin wax-soo-saarka qoraalka iyadoo kharashka fsync latency.
- Application-Layer cache (Redis, Memcached): Wuxuu fadhiyaa meel ka sarreeya xogta xogta oo dhan, isagoo kaydinaya natiijooyinka weydiimaha ama walxaha la xisaabiyay si looga fogaado garaacida xogta gabi ahaanba - ku habboon aaladaha SaaS-kirayste badan oo u adeegaya kumanaan isticmaale oo isku mid ah.
Sidee Mashruucyada Ganacsiga Casriga ah uga faa'iidaysan karaan naqshadaynta kaydinta kaydinta si loogu kalsoonaan karo miisaanka?
Meheradaha ka shaqeeya qaybo badan oo shaqaynaya - CRM, maaraynta mashruuca, ganacsiga e-commerce, falanqaynta - qaab dhismeedka kaydinta ayaa si toos ah u go'aamisa ka jawaabida goobta marka ay kooxuhu koraan. Platforms lagu dhisay istaraatijiyad khasnado si fiican loo dahaadhay waxay u adeegi kartaa tobanaan kun oo isticmaalayaasha isku xidhan iyada oo aan kharash kaabayaal la siman ahayn. Furaha ayaa ah qaabaynta qaababka gelitaanka xogta ee ixtiraamaya xuduudaha kaydinta: ilaalinta xogta kulul ee yaryar iyo qaababka gelitaanka la saadaalin karo, iyadoo la isticmaalayo akhrinta akhrin si loo qaybiyo culayska barkada, iyo meelaynta kaydka lakabka arji sida Redis horteeda kaydka dhamaadka dhibcaha u adeega xogta isku midka ah isticmaalayaasha badan isku mar. Mewayz waxa loo qaabeeyey iyadoo falsafadan maskaxda lagu hayo. Iyada oo 207 qaybood oo ganacsi oo isku dhafan ay awood u leeyihiin in ka badan 138,000 isticmaale, lakabka xogta madal waxaa loo qaabeeyey si inta badan akhristayaasha looga adeego kaydka - ilaalinta waqtiyada jawaabta degdega ah iyo kharashka kaabayaasha la saadaalin karo haddii aad ku socoto qorshaha bilawga $19/bishii ama $49/bishii heerka xirfadeed.Su'aalaha Inta badan La Isweydiiyo
Dib-u-dhigista kaydka waydiinta had iyo jeer ma horumarisaa waxqabadka xogta?
Had iyo jeer ma aha, laakiin culeysyada shaqada ee qoraalka-culus waxay caadi ahaan qabataa. Kaydinta weydiintu waxay u baahan tahay mutex caalami ah si loo ilaaliyo joogtaynta, taas oo noqonaysa dhalo hoos timaada isdhaafsiga sare. MySQL 8.0 ayaa gabi ahaanba meesha ka saartay kaydkii su'aasha sababtan awgeed. PostgreSQL waligeed ma hirgelin kayd su'aal ku dhex dhisan, iyada oo ku tiirsanayd barkada kaydinta iyo kaydinta lakabka codsiga. Haddii saamigaaga wax-akhris-ku-qorista uu sarreeyo oo su'aalahaagu ay yihiin kuwo aad u soo noqnoqda, kaydka weydiintu waxay keeni kartaa faa'iidooyin dhab ah - haddii kale, ku maalgeli dadaalka hagaajinta barkadda kaydinta.Sideen ku ogaan karaa in barkadayda kaydka ahi ay si sax ah u cabbiran tahay?
U fiirso saamiga garaaca barkadda kaydintaada: boqolleyda codsiyada bogga laga keenay barkadda iyo kuwa u baahan akhriska saxanka. Saamiga garaaca ee ka hooseeya 95% ee culeyska shaqada OLTP waa calaamad lagu kordhinayo cabbirka barkadda. MySQL dhexdeeda, weydiiSHOW ENGINE INNODB STATUS oo eeg heerka garaaca barkadda. Gudaha PostgreSQL, pg_statio_user_tables araggu waxay daaha ka qaadaysaa baloogyada laga akhriyay saxanka oo ka soo horjeeda barkadda kaydka ah. Ujeedo inaad ku hayso dhammaan shaqadaada shaqada - ma aha xogtaada buuxda - inay ku jirto RAM.
Waa maxay xidhiidhka ka dhexeeya lakabyada kaydka iyo isku halaynta SaaS-kirayste badan?
SaaS-kirayste badan, lakabyada kaydka ayaa ka hortagaya dhibaatooyinka "deriska buuqa badan" halkaasoo culeyska weydiinta culus ee hal kireyste hoos u dhigto waxqabadka dhammaan kireystayaasha kale. Codsiga ka warhaynta kiraystaha ee ku salaysan TTL waxay ilaalinaysaa xogta kulul ee kirayste kasta gudaha Redis, si wayn u yaraynaysa cadaadiska barkada kaydinta ee xisaabaadka waaweyn. Isku xirka heerka-database-ka oo lagu daray barkada kaydinta diirran waxay xaqiijisaa in dhaqdhaqaaqa dilaaca akoon kasta aanu ka soo daadin boggaga la wadaago khasnadda oo ay keento dib u dhac ku yimaad goobta oo dhan.
Lakabyada kaydka ma aha xog-ururin - waa aasaaska qaab dhismeedka ee kala saara dhufto ee sida ugu dhakhsaha badan ee u baahan dab-damiska kaabayaasha joogtada ah. Haddii aad dhisayso ama aad wado ganacsi u baahan goob mar horeba loo hagaajiyay xaqiiqooyinkan,ka baadh Mewayz at app.mewayz.com — 207 modules, hal madal isku xidhan, oo loo dhisay si ay u qabato si la isku halayn karo laga bilaabo isticmaalehaaga koowaad ilaa boqol kun iyo kun.
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