{"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\/cs\/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\u017ei\u0161t\u011bm Apache Cassandra?<\/h2>\n

\n23. kv\u011btna zvou Odnoklassniki zku\u0161en\u00e9 v\u00fdvoj\u00e1\u0159e do sv\u00e9 kancel\u00e1\u0159e v Petrohrad\u011b na meetup<\/a><\/noindex>, zam\u011b\u0159en\u00fd na pr\u00e1ci s Apache Cassandra. D\u016fle\u017eit\u00e9 je pouze va\u0161e zku\u0161enost s Cassandrou a ochota se o ni pod\u011blit.
\nZaregistrovat se na akci<\/a><\/noindex>
\n<\/a><\/noindex>
\nJsme v OK za\u010dali pou\u017e\u00edvat<\/a><\/noindex> Apache Cassandra v roce 2010 pro ukl\u00e1d\u00e1n\u00ed hodnocen\u00ed fotografi\u00ed. V sou\u010dasnosti jsme nejv\u011bt\u0161\u00edmi u\u017eivateli Apache Cassandra v Runetu a jedny z nejv\u011bt\u0161\u00edch v Evrop\u011b. M\u00e1me v\u00edce ne\u017e sto r\u016fzn\u00fdch klastr\u016f, kter\u00e9 se pou\u017e\u00edvaj\u00ed jak pro ukl\u00e1d\u00e1n\u00ed r\u016fzn\u00fdch produktov\u00fdch informac\u00ed \u2013 t\u0159\u00edd, chat\u016f, zpr\u00e1v, tak pro spr\u00e1vu kritick\u00fdch infrastrukturn\u00edch dat \u2013 mapov\u00e1n\u00ed logick\u00fdch blok\u016f na disky velk\u00e9ho bin\u00e1rn\u00edho \u00falo\u017ei\u0161t\u011b \u2013 one-cold-storage<\/a><\/noindex>, spr\u00e1va dat intern\u00edho cloudu one-cloud<\/a><\/noindex> atd.<\/p>\n

Celkov\u011b, pod spr\u00e1vou Cassandry se nach\u00e1zej\u00ed petaby dat na tis\u00edc\u00edch uzlech. B\u011bhem t\u00e9to doby jsme nasb\u00edrali obrovsk\u00e9 zku\u0161enosti s administrac\u00ed, v\u00fdvojem a provozem \u0159e\u0161en\u00ed zalo\u017een\u00fdch na Cassand\u0159e a dokonce jsme vyvinuli svou Odnoklassniki<\/a><\/noindex> vlastn\u00ed NewSQL transak\u010dn\u00ed DB Nyn\u00ed bychom se s v\u00e1mi r\u00e1di pod\u011blili o to v\u0161e \u2013 na re\u00e1ln\u00fdch p\u0159\u00edpadech z praxe a bez tajnost\u00ed; Akce prob\u011bhne ve form\u00e1tu \u017eiv\u00e9 diskuse mezi \u00fa\u010dastn\u00edky, co\u017e znamen\u00e1, \u017ee diskuse zaujme hlavn\u00ed \u010d\u00e1st \u010dasu.<\/a><\/noindex>.<\/p>\n

Odborn\u00edci OK jsou p\u0159ipraveni pod\u011blit se o sv\u00e9 my\u0161lenky a p\u0159\u00edstupy. Akci povedou<\/a><\/noindex> Oleg Anastasiev Aleksandr Christoforov<\/a><\/noindex> a Jak\u00e1 budou t\u00e9mata?<\/a><\/noindex>.<\/p>\n

Provoz:<\/h2>\n

<\/p>\n

Prozkoum\u00e1me typick\u00e9 konfigurace uzl\u016f a klastr\u016f v r\u016fzn\u00fdch produk\u010dn\u00edch instalac\u00edch. Diskutujeme, jak roz\u0161i\u0159ovat klastry s rostouc\u00edm objemem dat a z\u00e1t\u011b\u017ee a jak m\u011bnit selh\u00e1vaj\u00edc\u00ed uzly s minim\u00e1ln\u00edm dopadem na z\u00e1kazn\u00edky. Pod\u011bl\u00edme se o bolest a systematizujeme popul\u00e1rn\u00ed n\u00e1strahy. Zjist\u00edme, jak monitorovat klastry, abychom v\u010das ch\u00e1pali, kde a co p\u0159esn\u011b nefunguje. Dotkneme se probl\u00e9m\u016f nasazen\u00ed nov\u00fdch verz\u00ed Cassandry.<\/h3>\n

\nV\u00fdkon:<\/p>\n

Sna\u017eme se pochopit, na jak\u00e9 metriky se d\u00edvat a co lze doladit, aby se metriky zlep\u0161ily. Zjist\u00edme, zda retestovat, nebo ne, a pokud ano, tak jak. Identifikujeme \u00fazk\u00e1 m\u00edsta v architektu\u0159e a implementaci Cassandry a prozkoum\u00e1me n\u011bkter\u00e9 in\u017een\u00fdrsk\u00e9 triky, jak je obej\u00edt. Dotkneme se bolestiv\u00e9ho pravideln\u00e9ho opravov\u00e1n\u00ed a kompakce bez degradace v\u00fdkonu.<\/h3>\n

\nOdolnost:<\/p>\n

Odolnost proti v\u00fdpadk\u016fm:<\/h3>\n

\nHardware isn't eternal, so failures occur constantly, and a colleague's hand may falter, leading us to delete something by mistake. Therefore, let's discuss recovery after disk, machine, or data center failures, as well as rolling back to a consistent state from backups in case of operator errors.<\/p>\n

Registrujte se<\/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 solution Apache Cassandra? 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