{"id":120814,"date":"2024-12-02T09:45:59","date_gmt":"2024-12-02T07:46:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/sedmaya-beta-versiya-orioledb-vysokoproizvoditelnogo-dvizhka-hraneniya-dlya-postgresql"},"modified":"2024-12-02T09:45:59","modified_gmt":"2024-12-02T07:46:01","slug":"sedmaya-beta-versiya-orioledb-vysokoproizvoditelnogo-dvizhka-hraneniya-dlya-postgresql","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/sedmaya-beta-versiya-orioledb-vysokoproizvoditelnogo-dvizhka-hraneniya-dlya-postgresql","title":{"rendered":"Sedm\u00e1 beta verze OrioleDB, vysoce v\u00fdkonn\u00e9ho \u00falo\u017ei\u0161t\u011b pro PostgreSQL","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byla p\u0159edstavena beta verze \u00falo\u017ei\u0161t\u011b OrioleDB beta7 a zve\u0159ejn\u011bny v\u00fdsledky nov\u00fdch test\u016f, kter\u00e9 ukazuj\u00ed zna\u010dn\u00e9 zlep\u0161en\u00ed v\u00fdkonu ve srovn\u00e1n\u00ed s tradi\u010dn\u00edm PostgreSQL. Ve verzi beta7 byly implementov\u00e1ny optimalizace zam\u011b\u0159en\u00e9 na zlep\u0161en\u00ed v\u00fdkonu p\u0159i v\u00edcitr\u00e9ninkov\u00fdch z\u00e1t\u011b\u017e\u00edch a zrychlen\u00ed operac\u00ed \u010dten\u00ed a z\u00e1pisu. Prvn\u00ed stabiln\u00ed verze OrioleDB se pl\u00e1nuje na rok 2025. \u00dalo\u017ei\u0161t\u011b je naps\u00e1no v jazyce C a distribuuje se pod licenc\u00ed PostgreSQL, kter\u00e1 je podobn\u00e1 licenc\u00edm BSD a MIT. <\/p>\n

Projekt OrioleDB vyv\u00edj\u00ed alternativn\u00ed \u00falo\u017ei\u0161t\u011b pro PostgreSQL, kter\u00e9 bylo vytvo\u0159eno s c\u00edlem p\u0159ekonat omezen\u00ed standardn\u00edho mechanizmu \u00falo\u017ei\u0161t\u011b a zv\u00fd\u0161it celkovou efektivitu syst\u00e9mu. Nap\u0159\u00edklad OrioleDB umo\u017e\u0148uje obej\u00edt se bez periodick\u00e9ho prov\u00e1d\u011bn\u00ed operace VACUUM pro \u00faklid odpad\u016f, d\u00edky implementaci mechanizmu MVCC (Multi-Version Concurrency Control) zalo\u017een\u00e9ho na registrech vr\u00e1cen\u00ed (undo logs), kter\u00e9 funguj\u00ed na \u00farovni jednotliv\u00fdch blok\u016f a \u0159\u00e1dk\u016f, a tak\u00e9 syst\u00e9mu automatick\u00e9ho slu\u010dov\u00e1n\u00ed str\u00e1nek obsahuj\u00edc\u00edch data. OrioleDB rovn\u011b\u017e vyu\u017e\u00edv\u00e1 64bitov\u00e9 identifik\u00e1tory transakc\u00ed, co\u017e \u0159e\u0161\u00ed probl\u00e9m p\u0159ete\u010den\u00ed \u010d\u00edta\u010d\u016f. <\/p>\n

Pro usnadn\u011bn\u00ed pou\u017eit\u00ed v distribuovan\u00fdch syst\u00e9mech a paralelizaci operac\u00ed v OrioleDB byl zaveden WAL log transakc\u00ed na \u00farovni \u0159\u00e1dk\u016f. P\u0159i prov\u00e1d\u011bn\u00ed operace UPDATE je podporov\u00e1na v\u00fdm\u011bna dat na m\u00edst\u011b (bez uvoln\u011bn\u00ed aktu\u00e1ln\u00edho z\u00e1znamu a vytvo\u0159en\u00ed nov\u00e9ho), co\u017e pozitivn\u011b ovliv\u0148uje v\u00fdkon. V OrioleDB jsou tak\u00e9 implementov\u00e1ny funkce, jako je \u010dten\u00ed str\u00e1nek s daty bez pou\u017eit\u00ed z\u00e1mk\u016f, p\u0159\u00edm\u00e9 propojen\u00ed str\u00e1nek v pam\u011bti s str\u00e1nkami v trval\u00e9m \u00falo\u017ei\u0161ti, pou\u017eit\u00ed mechanizmu CoW (copy-on-write) p\u0159i zamyk\u00e1n\u00ed kontroln\u00edch bod\u016f pro vytv\u00e1\u0159en\u00ed konzistentn\u00edch sn\u00edmk\u016f v libovoln\u00e9m okam\u017eiku, re\u017eim ukl\u00e1d\u00e1n\u00ed dat ve zkomprimovan\u00e9 podob\u011b pomoc\u00ed algoritmu ZSTD. <\/p>\n

Mezi omezen\u00edmi p\u0159\u00edtomn\u00fdmi v sedm\u00e9 beta verzi OrioleDB se uv\u00e1d\u00ed mo\u017enost pou\u017eit\u00ed pouze index\u016f ve form\u00e1tu B-tree (v budoucnu bude p\u0159id\u00e1na podpora pro v\u0161echny typy index\u016f PostgreSQL), a tak\u00e9 nepodpora p\u0159edem p\u0159ipraven\u00fdch transakc\u00ed (PREPARE TRANSACTION) a p\u0159\u00edkazu «REINDEX» v re\u017eimu «CONCURRENTLY». OrioleDB je implementov\u00e1n jako p\u0159ipojiteln\u00e9 roz\u0161\u00ed\u0159en\u00ed, kter\u00e9 vy\u017eaduje \u00fapravy v hlavn\u00ed k\u00f3dov\u00e9 z\u00e1kladn\u011b PostgreSQL. <\/p>\n

Ve v\u00fdkonnostn\u00edch testech TPC-C, kter\u00e9 modeluj\u00ed z\u00e1t\u011b\u017e transak\u010dn\u00edho zpracov\u00e1n\u00ed v re\u00e1ln\u00fdch podm\u00ednk\u00e1ch, sedm\u00e1 beta verze OrioleDB prok\u00e1zala v\u00fdraznou p\u0159evahu nad standardn\u00edm enginem PostgreSQL. Testov\u00e1n\u00ed bylo provedeno s r\u016fzn\u00fdm po\u010dtem sou\u010dasn\u011b pracuj\u00edc\u00edch klient\u016f, aby se zhodnotila \u0161k\u00e1lovatelnost a v\u00fdkonnost syst\u00e9mu p\u0159i zvy\u0161uj\u00edc\u00ed se z\u00e1t\u011b\u017ei. <\/p>\n

V testech, kter\u00e9 hodnotily propustnost transakc\u00ed, dos\u00e1hl engine OrioleDB vy\u0161\u0161\u00ed propustnosti, m\u011b\u0159en\u00e9 v transakc\u00edch za minutu (tpmC). P\u0159i zvy\u0161uj\u00edc\u00edm se po\u010dtu klient\u016f v\u00fdkonnost OrioleDB nad\u00e1le line\u00e1rn\u011b rostla, zat\u00edmco u enginu Heap v PostgreSQL byla pozorov\u00e1na tendence ke stagnaci a dokonce poklesu po ur\u010dit\u00e9m prahu.

\"Sedm\u00e1<\/center>
\"Sedm\u00e1<\/center>
\"Sedm\u00e1<\/center> <\/p>\n

Ve testech na dobu odezvy bylo pr\u016fm\u011brn\u00e9 \u010dasov\u00e9 odezvy transakc\u00ed v OrioleDB v\u00fdrazn\u011b ni\u017e\u0161\u00ed ve srovn\u00e1n\u00ed s PostgreSQL. T\u00edm p\u00e1dem syst\u00e9my zalo\u017een\u00e9 na OrioleDB mohou zpracov\u00e1vat v\u00edce transakc\u00ed ve stejn\u00e9m \u010dasov\u00e9m \u00faseku, a t\u00edm zajistit rychlej\u0161\u00ed vy\u0159izov\u00e1n\u00ed dotaz\u016f. P\u0159i m\u011b\u0159en\u00ed vyu\u017eit\u00ed zdroj\u016f engine OrioleDB prok\u00e1zal \u00fa\u010dinn\u011bj\u0161\u00ed vyu\u017eit\u00ed CPU a pam\u011bti, d\u00edky optimalizovan\u00e9mu \u0159\u00edzen\u00ed zdroj\u016f.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0430 \u0431\u0435\u0442\u0430-\u0432\u0435\u0440\u0441\u0438\u044f \u0434\u0432\u0438\u0436\u043a\u0430 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f OrioleDB beta7 \u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u043d\u043e\u0432\u044b\u0445 \u0442\u0435\u0441\u0442\u043e\u0432, \u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u0442\u0440\u0430\u0434\u0438\u0446\u0438\u043e\u043d\u043d\u044b\u043c PostgreSQL. \u0412 \u0432\u0435\u0440\u0441\u0438\u0438 beta7 \u0431\u044b\u043b\u0438 \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u044b \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438, \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u043d\u0430 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0435 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u044b\u043c\u0438 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0430\u043c\u0438 \u0438 \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0447\u0442\u0435\u043d\u0438\u044f \u0438 \u0437\u0430\u043f\u0438\u0441\u0438. \u041f\u0435\u0440\u0432\u044b\u0439 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u043b\u0438\u0437 OrioleDB \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0432 2025 \u0433\u043e\u0434\u0443. 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