{"id":83153,"date":"2020-05-29T01:42:10","date_gmt":"2020-05-28T23:42:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-raspredelyonnoj-subd-tidb-4-0"},"modified":"2020-05-29T01:42:10","modified_gmt":"2020-05-28T23:42:10","slug":"vypusk-raspredelyonnoj-subd-tidb-4-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/vypusk-raspredelyonnoj-subd-tidb-4-0","title":{"rendered":"L\u00ebshimi i DBs distribuget TiDB 4.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/pingcap\/tidb\/releases\/tag\/v4.0.0\">I verf\u00fcsh\u00ebm<\/a><\/noindex> l\u00ebshimi i DB t\u00eb shp\u00ebrndar\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/pingcap.com\/index\">TiDB 4.0<\/a><\/noindex>, i zhvilluar n\u00ebn ndikimin e teknologjive Google <noindex><a rel=\"nofollow\" href=\"http:\/\/research.google.com\/archive\/spanner.html\">Spanner<\/a><\/noindex> dhe <noindex><a rel=\"nofollow\" href=\"http:\/\/research.google.com\/pubs\/pub38125.html\">F1<\/a><\/noindex>. TiDB i p\u00ebrket kategoris\u00eb s\u00eb sistemeve hibride HTAP (Hybrid Transactional\/Analytical Processing), t\u00eb cilat jan\u00eb n\u00eb gjendje t\u00eb sigurojn\u00eb realizimin e transaksioneve n\u00eb koh\u00eb reale (OLTP) dhe t\u00eb realizojn\u00eb p\u00ebrpunimin e pyetjeve analitike. Projekti \u00ebsht\u00eb shkruar n\u00eb gjuh\u00ebn Go dhe <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/pingcap\/tidb\">distribuohet<\/a><\/noindex> n\u00ebn licenc\u00ebn Apache 2.0.<\/p>\n<p>Karakteristikat e TiDB:\n<\/p>\n<ul>\n<li class=\"l\"> Mb\u00ebshtetje p\u00ebr SQL dhe ofrimi i nj\u00eb nd\u00ebrfaqeje klienti, p\u00ebrputhsh\u00ebm me protokollin MySQL, \u00e7ka e b\u00ebn adaptimin p\u00ebr TiDB t\u00eb aplikacioneve ekzistuese q\u00eb jan\u00eb shkruar p\u00ebr MySQL m\u00eb t\u00eb leht\u00eb, si dhe lejon p\u00ebrdorimin e bibliotekave t\u00eb njohura t\u00eb klient\u00ebve. P\u00ebrve\u00e7 protokollit MySQL, mund t\u00eb p\u00ebrdoret API me baz\u00eb JSON dhe nj\u00eb lidh\u00ebs p\u00ebr Spark p\u00ebr t\u00eb aksesuar DB.\n<\/li>\n<li class=\"l\"> Nga mund\u00ebsit\u00eb e SQL mb\u00ebshteten indekset, funksionet agregate, shprehjet GROUP BY, ORDER BY, DISTINCT, bashk\u00ebtit\u00eb (LEFT JOIN \/ RIGHT JOIN \/ CROSS JOIN), pamjet, funksionet e dritarave dhe n\u00ebnpyetjet. Mund\u00ebsit\u00eb e ofruara jan\u00eb t\u00eb mjaftueshme p\u00ebr t\u00eb organizuar pun\u00ebn me TiDB t\u00eb aplikacioneve web si PhpMyAdmin, <noindex><a rel=\"nofollow\" href=\"https:\/\/gogs.io\/\">Gogs<\/a><\/noindex> dhe WordPress;\n<\/li>\n<li class=\"l\"> Mund\u00ebsia p\u00ebr skalim horizontal dhe sigurimin e q\u00ebndrueshm\u00ebris\u00eb: madh\u00ebsia e magazin\u00ebs dhe fuqia llogarit\u00ebse mund t\u00eb zgjaten thjesht duke lidhur nyje t\u00eb reja. T\u00eb dh\u00ebnat shp\u00ebrndahen n\u00ebp\u00ebr nyje me tep\u00ebrsi, duke lejuar vazhdimin e pun\u00ebs n\u00eb rastin e d\u00ebshtimeve t\u00eb nyjeve t\u00eb ve\u00e7anta. D\u00ebshtimet trajtohen automatikisht.\n<\/li>\n<li class=\"l\"> Sistemi garanton konsistenc\u00ebn dhe p\u00ebr softuerin e klientit duket si nj\u00eb baz\u00eb e dh\u00ebnash e madhe, ndon\u00ebse n\u00eb t\u00eb v\u00ebrtet\u00eb p\u00ebr ekzekutimin e transaksioneve p\u00ebrfshihen t\u00eb dh\u00ebna nga shum\u00eb nyje.\n<\/li>\n<li class=\"l\"> P\u00ebr ruajtjen fizike t\u00eb t\u00eb dh\u00ebnave n\u00eb nyje, mund t\u00eb p\u00ebrdoren backend t\u00eb ndryshme, t\u00eb tilla si motor\u00ebt e ruajtjes lokale GoLevelDB dhe BoltDB, ose motor\u00ebt e vet\u00eb ruajtjes t\u00eb shp\u00ebrndar\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/pingcap\/tikv\">TiKV<\/a><\/noindex> dhe TiFlash. TiKV ruan t\u00eb dh\u00ebnat n\u00eb formatin \u00e7el\u00ebs\/vler\u00eb n\u00eb p\u00ebrpjes\u00ebtim t\u00eb rreshtave dhe \u00ebsht\u00eb m\u00eb optimal p\u00ebr detyra t\u00eb p\u00ebrpunimit t\u00eb transaksioneve (OLTP). TiFlash ruan t\u00eb dh\u00ebnat n\u00eb lidhje me kolona dhe lejon arritjen e performanc\u00ebs m\u00eb t\u00eb lart\u00eb p\u00ebr zgjidhjen e detyrave analitike (OLAP).\n<\/li>\n<li class=\"l\"> Mund\u00ebsia p\u00ebr ndryshime asinkrone n\u00eb skem\u00ebn e ruajtjes, duke lejuar shtimin e kolonave dhe indekseve n\u00eb fluks pa ndaluar p\u00ebrpunimin e operacioneve aktuale.\n<\/li>\n<\/ul>\n<p>N\u00eb l\u00ebshimin e ri:<\/p>\n<ul>\n<li class=\"l\"> Me default aktivizohet mbledh\u00ebsi i shp\u00ebrndar\u00eb i mbetjeve Green GC, q\u00eb lejon nj\u00eb rritje t\u00eb konsiderueshme t\u00eb shpejt\u00ebsis\u00eb s\u00eb mbledhjes s\u00eb mbetjeve n\u00eb klaster\u00eb t\u00eb m\u00ebdhenj dhe rrit stabilitetin e funksionimit;\n<li class=\"l\">\u00cbsht\u00eb shtuar mb\u00ebshtetje p\u00ebr transaksione t\u00eb m\u00ebdha, t\u00eb cilat jan\u00eb t\u00eb kufizuara praktikisht nga madh\u00ebsia e memories fizike. Kufiri i madh\u00ebsis\u00eb s\u00eb nj\u00eb transaksioni \u00ebsht\u00eb rritur nga 100 MB n\u00eb 10 GB;\n<li class=\"l\"> \u00cbsht\u00eb shtuar mb\u00ebshtetje p\u00ebr komandat BACKUP dhe RESTORE p\u00ebr rezervimin e t\u00eb dh\u00ebnave;\n<li class=\"l\"> \u00cbsht\u00eb shtuar mund\u00ebsia p\u00ebr vendosjen e bllokimeve n\u00eb tabela;\n<li class=\"l\"> \u00cbsht\u00eb shtuar nj\u00eb mekaniz\u00ebm i izolimit t\u00eb transaksioneve t\u00eb p\u00ebrputhshme me MySQL n\u00eb nivelin e leximit (READ COMMITTED);\n<li class=\"l\"> Ekipes &#171;ADMIN SHOW DDL JOBS&#187; iu b\u00eb shtes\u00eb mb\u00ebshtetje p\u00ebr shprehjet LIKE dhe WHERE;\n<li class=\"l\"> \u00cbsht\u00eb shtuar parametri oom-use-tmp-storage, q\u00eb lejon p\u00ebrdorimin e skedar\u00ebve p\u00ebr t\u00eb p\u00ebrkohsh\u00ebm p\u00ebr ruajtjen e rezultateve t\u00eb nd\u00ebrmjetme n\u00eb kushte t\u00eb munges\u00ebs s\u00eb memories operative;\n<li class=\"l\"> \u00cbsht\u00eb shtuar fjala ky\u00e7e Random p\u00ebr t'i dh\u00ebn\u00eb atributeve vlera rast\u00ebsore;\n<li class=\"l\"> N\u00eb komand\u00ebn LOAD DATA \u00ebsht\u00eb shtuar mund\u00ebsia p\u00ebr t\u00eb p\u00ebrdorur shprehje t\u00eb gjasht\u00ebk\u00ebndshme dhe binar\u00eb;\n<li class=\"l\"> \u00cbsht\u00eb shtuar 15 parametra p\u00ebr menaxhimin e sjelljes s\u00eb optimizuesit;\n<li class=\"l\"> \u00cbsht\u00eb shtuar mjet p\u00ebr diagnostikimin e performanc\u00ebs s\u00eb k\u00ebrkesave SQL. \u00cbsht\u00eb shtuar nj\u00eb log i k\u00ebrkesave t\u00eb ngadalta, i aksesuesh\u00ebm p\u00ebrmes tabelave sistemike SLOW_QUERY \/ CLUSTER_SLOW_QUERY;\n<li class=\"l\"> \u00cbsht\u00eb shtuar mb\u00ebshtetje p\u00ebr funksione p\u00ebr pun\u00eb me sekuenca;\n<li class=\"l\"> Shtuar mund\u00ebsin\u00eb e ndryshimit dinamik t\u00eb parametrave t\u00eb konfigurimit, t\u00eb lexuar nga PD (Placement Driver, serveri i menaxhimit t\u00eb klasterit). Shtuar mund\u00ebsin\u00eb e p\u00ebrdorimit t\u00eb shprehjes &#171;SET CONFIG&#187; p\u00ebr t\u00eb ndryshuar cil\u00ebsimet e nyjeve PD\/TiKV.\n<li class=\"l\"> \u00cbsht\u00eb shtuar cil\u00ebsimi max-server-connections p\u00ebr t\u00eb kufizuar numrin maksimal t\u00eb lidhjeve t\u00eb nj\u00ebkohshme me serverin (me default 4096);\n<li class=\"l\"> \u00ebsht\u00eb rritur performanca n\u00eb situata kur kolona t\u00eb k\u00ebrkuara mbulohen plot\u00ebsisht nga indeksat;\n<li class=\"l\"> \u00cbsht\u00eb shtuar optimizimi i k\u00ebrkesave mbi baz\u00ebn e bashkimit t\u00eb indeksave;\n<li class=\"l\"> \u00ebsht\u00eb rritur performanca e operacioneve me intervale vlerash;\n<li class=\"l\"> \u00ebsht\u00eb zvog\u00ebluar ngarkesa n\u00eb CPU p\u00ebrmes ruajtjes n\u00eb cache t\u00eb rezultateve t\u00eb qasjes n\u00eb indekse dhe eliminimin e kopjeve t\u00eb dyfishta;\n<li class=\"l\"> \u00cbsht\u00eb shtuar mb\u00ebshtetje p\u00ebr format t\u00eb ri ruajtjeje t\u00eb rreshtave, q\u00eb lejon rritjen e performanc\u00ebs s\u00eb tabelave me numra t\u00eb m\u00ebdhenj kolonash;\n<li class=\"l\"> N\u00eb funksionin GROUP_CONCAT \u00ebsht\u00eb shtuar mb\u00ebshtetje p\u00ebr shprehjen &#171;ORDER BY&#187;;\n<li class=\"l\"> \u00ebsht\u00eb shtuar mund\u00ebsia e nxjerrjes s\u00eb t\u00eb dh\u00ebnave nga logu TiFlash p\u00ebrmes SQL;\n<li class=\"l\"> N\u00eb komand\u00ebn &#171;RECOVER TABLE&#187; \u00ebsht\u00eb realizuar mb\u00ebshtetje p\u00ebr rivendosjen e tabelave t\u00eb prera;\n<li class=\"l\"> \u00ebsht\u00eb shtuar tabela sistemike DDLJobs p\u00ebr t\u00eb k\u00ebrkuar detajet mbi realizimin e pun\u00ebve DDL;\n<li class=\"l\"> \u00ebsht\u00eb shtuar mund\u00ebsia e p\u00ebrdorimit t\u00eb komand\u00ebs SHOW CONFIG p\u00ebr t\u00eb treguar cil\u00ebsimet PD dhe TiKV;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/pingcap\/tidb\/pull\/16710\">E aktivizuar<\/a><\/noindex>  me default cache e coprocesor\u00ebve;\n<li class=\"l\"> Numri i goroutines n\u00eb faz\u00ebn e p\u00ebrpjekjeve t\u00eb p\u00ebrs\u00ebritura t\u00eb komitit tani mund t\u00eb kontrollohet p\u00ebrmes cil\u00ebsimit committer-concurrency;\n<li class=\"l\"> \u00ebsht\u00eb shtuar mund\u00ebsia e shfaqjes s\u00eb rajon\u00ebve t\u00eb ndarjes s\u00eb tabelave;\n<li class=\"l\"> N\u00eb tidb-server \u00ebsht\u00eb shtuar mund\u00ebsia p\u00ebr t\u00eb kufizuar madh\u00ebsin\u00eb e ruajtjes p\u00ebrkohshme;\n<li class=\"l\"> Shtuar mb\u00ebshtetje p\u00ebr operacionet &#171;insert into tbl_name partition(partition_name_list)&#187; dhe &#171;replace into tbl_name partition(partition_name_list)&#187;;\n<li class=\"l\"> N\u00eb hashin e p\u00ebrdorur p\u00ebr seksionim (particionim) \u00ebsht\u00eb shtuar mb\u00ebshtetje p\u00ebr filtrimin sipas kriterit &#171;is null&#187;;\n<li class=\"l\"> P\u00ebr tabelat e ndara \u00ebsht\u00eb shtuar mb\u00ebshtetje p\u00ebr operacionet e verifikimit, pastrimit dhe rikuperimit t\u00eb indeksave.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Burimi: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53045\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u0421\u0423\u0411\u0414 TiDB 4.0, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u043f\u043e\u0434 \u0432\u043f\u0435\u0447\u0430\u0442\u043b\u0435\u043d\u0438\u0435\u043c \u043e\u0442 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0439 Google Spanner \u0438 F1. 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