Zhvilluesit e projektit SQLite kan\u00eb filluar testimin e backend-it eksperimental HCtree, i cili mb\u00ebshtet bllokimin n\u00eb nivelin e rreshtave dhe ofron nj\u00eb nivel t\u00eb lart\u00eb paralelizimi gjat\u00eb p\u00ebrpunimit t\u00eb pyetjeve. Backend-i i ri \u00ebsht\u00eb orientuar p\u00ebr t\u00eb rritur efikasitetin e p\u00ebrdorimit t\u00eb SQLite n\u00eb sistemet klient-server, ku duhet t\u00eb p\u00ebrpunohen nj\u00eb num\u00ebr i madh k\u00ebrkesash t\u00eb p\u00ebrs\u00ebritura p\u00ebr shkrim n\u00eb baz\u00ebn e t\u00eb dh\u00ebnave. <\/p>\n
Strukturat b-tree, t\u00eb cilat initially jan\u00eb p\u00ebrdorur n\u00eb SQLite p\u00ebr ruajtjen e t\u00eb dh\u00ebnave, nuk jan\u00eb dizajnuar p\u00ebr llojin e till\u00eb t\u00eb ngarkes\u00ebs, duke kufizuar SQLite n\u00eb shkrimin vet\u00ebm n\u00eb nj\u00eb rrjedh\u00eb. Si nj\u00eb eksperiment, zhvilluesit kan\u00eb filluar t\u00eb zhvillojn\u00eb nj\u00eb zgjidhje alternative q\u00eb p\u00ebrdor struktur\u00ebn HC-tree p\u00ebr ruajtje, m\u00eb t\u00eb p\u00ebrshtatshme p\u00ebr paralelizimin e operacioneve t\u00eb shkrimit. <\/p>\n
P\u00ebr t\u00eb organizuar ekzekutimin paralel t\u00eb disa operacioneve n\u00eb HCtree, regjistrimet p\u00ebrdorin nj\u00eb mekaniz\u00ebm ndarjeje transaksionesh, i cili p\u00ebrdor bllokime n\u00eb nivelin e faqeve dhe \u00ebsht\u00eb i ngjash\u00ebm me MVCC (menaxhimi shum\u00eb-versional i aksesit konkurrues), por p\u00ebrdor kontrollin e transaksioneve n\u00eb baz\u00eb t\u00eb \u00e7el\u00ebsave dhe intervaleve t\u00eb \u00e7el\u00ebsave n\u00eb vend t\u00eb grupeve t\u00eb faqeve. Operacionet e leximit dhe shkrimit ekzekutohen n\u00eb lidhje me snapshot-in e baz\u00ebs s\u00eb t\u00eb dh\u00ebnave, ndryshimi i t\u00eb cilit b\u00ebhet i duksh\u00ebm n\u00eb baz\u00ebn e t\u00eb dh\u00ebnave kryesore vet\u00ebm pas p\u00ebrfundimit t\u00eb transaksionit. <\/p>\n
Klient\u00ebt mund t\u00eb p\u00ebrdorin tre operacione p\u00ebr hapjen e transaksioneve: <\/p>\n
HCtree mb\u00ebshtet replikimin n\u00eb stilin \u00abmaster-slave\u00bb, duke lejuar transferimin e transaksioneve n\u00eb nj\u00eb Baza t\u00eb Dh\u00ebnash tjet\u00ebr dhe duke mbajtur bazat e dyta n\u00eb nj\u00eb gjendje t\u00eb sinkronizuar me Bazen kryesore t\u00eb Dh\u00ebnash. HCtree gjithashtu heq kufizimin mbi madh\u00ebsin\u00eb e Baz\u00ebs s\u00eb Dh\u00ebnash \u2014 n\u00eb vend t\u00eb identifikuesve t\u00eb dh\u00ebnash 32-bit\u00ebsh, HCtree p\u00ebrdor 48-bit\u00eb, duke rritur madh\u00ebsin\u00eb maksimale t\u00eb Baz\u00ebs s\u00eb Dh\u00ebnash nga 16 tebibajt n\u00eb 1 eksbibajt (nj\u00eb milion tebibajt). Pritet q\u00eb performanca e SQLite me backend-in HCtree t\u00eb jet\u00eb jo m\u00eb e ul\u00ebt se backend-i klasik me nj\u00eb nx\u00ebn\u00ebs. Klient\u00ebt SQLite me mb\u00ebshtetje p\u00ebr HCtree do t\u00eb mund t\u00eb qasen si n\u00eb Baz\u00ebn e Dh\u00ebnash t\u00eb bazuar n\u00eb struktur\u00ebn HC-tree, ashtu edhe n\u00eb Bazat e Dh\u00ebnash t\u00eb vjetra SQLite. \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 SQLite \u043d\u0430\u0447\u0430\u043b\u0438 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0431\u044d\u043a\u0435\u043d\u0434\u0430 HCtree, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0443 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u0441\u0442\u0440\u043e\u043a (row) \u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u0440\u0430\u0441\u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u0438\u0432\u0430\u043d\u0438\u044f \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432. \u041d\u043e\u0432\u044b\u0439 \u0431\u044d\u043a\u0435\u043d\u0434 \u043d\u0430\u0446\u0435\u043b\u0435\u043d \u043d\u0430 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u0435 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f SQLite \u0432 \u043a\u043b\u0438\u0435\u043d\u0442-\u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u0440\u0438\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0442\u044c \u0431\u043e\u043b\u044c\u0448\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043a \u0411\u0414 \u043d\u0430 \u0437\u0430\u043f\u0438\u0441\u044c. \u0421\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b b-tree, \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0435 \u0432 SQLite \u0434\u043b\u044f \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445, \u043d\u0435 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\u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432.","og:url":"https:\/\/prohoster.info\/sq\/blog\/news\/razrabotchiki-sqlite-razvivayut-bekend-hc-tree-s-podderzhkoj-parallelnyh-operaczij-zapisi","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2023-01-19T16:48:11+00:00","article:modified_time":"2023-01-24T11:52:43+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/posts\/106417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/comments?post=106417"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/posts\/106417\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/media?parent=106417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/categories?post=106417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sq\/wp-json\/wp\/v2\/tags?post=106417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"