{"id":32402,"date":"2019-10-31T21:46:51","date_gmt":"2019-10-31T18:46:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/ok-tech-cassandra-meetup\/"},"modified":"2019-10-31T21:46:51","modified_gmt":"2019-10-31T18:46:51","slug":"ok-tech-cassandra-meetup","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/ok-tech-cassandra-meetup","title":{"rendered":"ok.tech: Cassandra meetup","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\"ok.tech:
\n<\/p>\n

Pracujete s NoSQL \u00falo\u017eiskom Apache Cassandra?<\/h2>\n

\nD\u0148a 23. m\u00e1ja Odnoklassniki poz\u00fdvaj\u00fa sk\u00fasen\u00fdch v\u00fdvoj\u00e1rov do svojho kancel\u00e1rie v Petrohrade na meetup<\/a><\/noindex>, zameran\u00fd na pr\u00e1cu s Apache Cassandra. D\u00f4le\u017eit\u00e1 je len va\u0161a sk\u00fasenos\u0165 s Cassandrou a ochota sa o \u0148u podeli\u0165.
\nZaregistrova\u0165 sa na akciu<\/a><\/noindex>
\n<\/a><\/noindex>
\nSme na OK za\u010dali pou\u017e\u00edva\u0165<\/a><\/noindex> Apache Cassandra v roku 2010 na uchov\u00e1vanie hodnoten\u00ed fotografi\u00ed. V s\u00fa\u010dasnosti sme najv\u00e4\u010d\u0161\u00edmi pou\u017e\u00edvate\u013emi Apache Cassandra v Runete a jedn\u00fdmi z najv\u00e4\u010d\u0161\u00edch v Eur\u00f3pe. M\u00e1me viac ako sto r\u00f4znych klastrov, ktor\u00e9 sa pou\u017e\u00edvaj\u00fa na uchov\u00e1vanie r\u00f4znych produktov\u00fdch inform\u00e1ci\u00ed - triedy, chaty, spr\u00e1vy, ako aj na spr\u00e1vu kritick\u00fdch infra\u0161trukt\u00farnych \u00fadajov - mapovanie logick\u00fdch blokov na disky ve\u013ek\u00e9ho bin\u00e1rneho \u00falo\u017eiska - one-cold-storage<\/a><\/noindex>, spr\u00e1va \u00fadajov intern\u00e9ho cloudu one-cloud<\/a><\/noindex> a pod.<\/p>\n

Celkom v Odnoklassnikoch<\/a><\/noindex> pod spr\u00e1vou Cassandry sa nach\u00e1dzaj\u00fa petabajty \u00fadajov na tis\u00edckach uzlov. Po\u010das tohto obdobia sme nadobudli obrovsk\u00e9 sk\u00fasenosti v administr\u00e1cii, v\u00fdvoji a prev\u00e1dzke rie\u0161en\u00ed zalo\u017een\u00fdch na Cassandre a dokonca sme vyvinuli na\u0161u vlastn\u00fa NewSQL transak\u010dn\u00fa datab\u00e1zu<\/a><\/noindex>.<\/p>\n

Teraz by sme sa s vami chceli podeli\u0165 o v\u0161etko toto \u2014 na skuto\u010dn\u00fdch pr\u00edpadoch z praxe a bez tajomstiev; Podujatie prebehne v form\u00e1te otvorenej diskusie medzi \u00fa\u010dastn\u00edkmi, tak\u017ee diskusia zaberie v\u00e4\u010d\u0161inu \u010dasu. Experti OK<\/a><\/noindex> s\u00fa pripraven\u00ed podeli\u0165 sa o svoje my\u0161lienky a pr\u00edstupy. Vedenie podujatia bud\u00fa ma\u0165 Oleg Anastasiev<\/a><\/noindex> a Alexander Christoforov<\/a><\/noindex>.<\/p>\n

Ak\u00e9 bud\u00fa t\u00e9my?<\/h2>\n

<\/p>\n

Prev\u00e1dzka:<\/h3>\n

\nPresk\u00famame typick\u00e9 konfigur\u00e1cie uzlov a klastrov v r\u00f4znych produk\u010dn\u00fdch in\u0161tal\u00e1ci\u00e1ch. Budeme diskutova\u0165 o tom, ako roz\u0161irova\u0165 klastre so zvy\u0161ovan\u00edm objemov \u00fadajov a z\u00e1\u0165a\u017ee a ako nahradi\u0165 zlyh\u00e1vaj\u00face uzly s minim\u00e1lnym dopadom na z\u00e1kazn\u00edkov. Podel\u00edme sa o na\u0161e probl\u00e9my a systematizujeme popul\u00e1rne prek\u00e1\u017eky. Zist\u00edme, ako monitorova\u0165 klastre, aby sme v\u010das pochopili, kde a \u010do presne nefunguje. Dotkneme sa probl\u00e9mov nasadenia nov\u00fdch verzi\u00ed Cassandry.<\/p>\n

V\u00fdkon:<\/h3>\n

\nPok\u00fasime sa pochopi\u0165, na ktor\u00e9 metriky sa zamera\u0165 a \u010do mo\u017eno optimalizova\u0165, aby sa metriky zlep\u0161ili. Rie\u0161ime, \u010di opakova\u0165 alebo nie, a ak \u00e1no, tak ako. Identifikujeme \u00fazke miesta v architekt\u00fare a implement\u00e1cii Cassandry a presk\u00famame niektor\u00e9 in\u017einierske triky, aby sme ich obch\u00e1dzali. Dotkneme sa naliehavej t\u00e9my pravideln\u00e9ho opravy a kompresie bez degrad\u00e1cie v\u00fdkonu.<\/p>\n

Odolnos\u0165:<\/h3>\n

\nHardwear isn't eternal, which is why failures happen frequently. A colleague's hand might tremble, and we could delete something by mistake. Therefore, let's discuss recovery from disk, machine, or data center failures, as well as rolling back to a consistent state from backups in case of operator errors.<\/p>\n

Prihl\u00e1ste sa<\/a><\/noindex> and tell your friends and colleagues about the event.
\n
Zdroj: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0431\u043e\u0442\u0430\u0435\u0442\u0435 \u0441 NoSQL-\u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435\u043c Apache Cassandra? 23 \u043c\u0430\u044f \u041e\u0434\u043d\u043e\u043a\u043b\u0430\u0441\u0441\u043d\u0438\u043a\u0438 \u043f\u0440\u0438\u0433\u043b\u0430\u0448\u0430\u044e\u0442 \u043e\u043f\u044b\u0442\u043d\u044b\u0445 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u0432 \u0441\u0432\u043e\u0439 \u043e\u0444\u0438\u0441 \u0432 \u041f\u0435\u0442\u0435\u0440\u0431\u0443\u0440\u0433\u0435 \u043d\u0430 \u043c\u0438\u0442\u0430\u043f, \u043f\u043e\u0441\u0432\u044f\u0449\u0435\u043d\u043d\u044b\u0439 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 Apache Cassandra. \u0412\u0430\u0436\u0435\u043d \u043b\u0438\u0448\u044c \u0432\u0430\u0448 \u043e\u043f\u044b\u0442 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 Cassandra \u0438 \u0436\u0435\u043b\u0430\u043d\u0438\u0435 \u0438\u043c \u043f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f. \u0417\u0430\u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043d\u0430 \u043c\u0435\u0440\u043e\u043f\u0440\u0438\u044f\u0442\u0438\u0435 \u041c\u044b \u0432 \u041e\u041a \u043d\u0430\u0447\u0430\u043b\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c Apache Cassandra \u0432 2010 \u0433\u043e\u0434\u0443 \u0434\u043b\u044f \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043e\u0446\u0435\u043d\u043e\u043a \u0444\u043e\u0442\u043e. \u0412 \u043d\u0430\u0441\u0442\u043e\u044f\u0449\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u043c\u044b […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":24215,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-32402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47ok.tech: Cassandra meetup | ProHoster","description":"Are you working with the NoSQL storage Apache Cassandra? 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