{"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\/da\/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

Arbejder du med NoSQL-databasen Apache Cassandra?<\/h2>\n

\nDen 23. maj inviterer Odnoklassniki erfarne udviklere til deres kontor i Petersborg til et meetup<\/a><\/noindex>, der besk\u00e6ftiger sig med arbejdet med Apache Cassandra. Det v\u00e6sentlige er kun din erfaring med Cassandra og \u00f8nsket om at dele det.
\nTilmeld dig arrangementet<\/a><\/noindex>
\n<\/a><\/noindex>
\nVi i OK begyndte at bruge<\/a><\/noindex> Apache Cassandra i 2010 til opbevaring af vurderinger af billeder. I dag er vi de st\u00f8rste brugere af Apache Cassandra i Runet og blandt de st\u00f8rste i Europa. Vi har over hundrede forskellige klynger, der anvendes b\u00e5de til opbevaring af forskellige produktinformationer - klasser, chat, beskeder - og til h\u00e5ndtering af kritiske infrastrukturdatastr\u00f8mme - kortl\u00e6gning af logiske blokke til store bin\u00e6re lagerdiske - one-cold-storage<\/a><\/noindex>, styring af data i skyen. one-cloud<\/a><\/noindex> osv.<\/p>\n

I alt under Odnoklassniki<\/a><\/noindex> er der petabyte data under styring af Cassandra p\u00e5 tusindvis af noder. I denne tid har vi opn\u00e5et enorm erfaring i administration, udvikling og drift af l\u00f8sninger baseret p\u00e5 Cassandra og har endda udviklet vores egen egen NewSQL transaktionel database.<\/a><\/noindex>.<\/p>\n

Nu \u00f8nsker vi at dele alt dette med dig - gennem \u00e6gte casestudier fra praksis og uden hemmeligheder; Arrangementet vil finde sted i form af en levende diskussion mellem deltagerne, hvilket betyder, at diskussionen vil optage det meste af tiden. Eksperter fra OK<\/a><\/noindex> er klar til at dele deres id\u00e9er og tilgange. Arrangementet vil blive ledet af Oleg Anastasev<\/a><\/noindex> og Alexander Christoforov<\/a><\/noindex>.<\/p>\n

Hvilke emner vil der v\u00e6re?<\/h2>\n

<\/p>\n

Drift:<\/h3>\n

\nVi vil gennemg\u00e5 typiske konfigurationer af noder og klynger i forskellige produktionsinstallationer. Vi vil diskutere, hvordan man kan udvide klyngen, n\u00e5r datam\u00e6ngder og belastning vokser, og hvordan man kan udskifte defekte noder med minimal effekt for kunderne. Vi vil dele vores udfordringer og systematisere de mest almindelige faldgruber. Vi vil finde ud af, hvordan man overv\u00e5ger klyngen for tidligt at forst\u00e5, hvor og hvad der ikke fungerer. Vi vil tage fat p\u00e5 problemerne ved implementering af nye versioner af Cassandra.<\/p>\n

Ydeevne:<\/h3>\n

\nVi vil fors\u00f8ge at forst\u00e5, hvilke m\u00e5linger der skal f\u00f8lges, og hvad der kan finjusteres for at forbedre disse m\u00e5linger. Vi vil finde ud af, om vi skal gentransmittere eller ej, og i s\u00e5 fald hvordan. Vi vil identificere flaskehalse i arkitekturen og implementeringen af Cassandra og se p\u00e5 nogle ingeni\u00f8rtricks til at omg\u00e5 dem. Vi vil ogs\u00e5 tage fat p\u00e5 det presserende problem med regelm\u00e6ssig reparation og komprimering uden at degradere ydeevnen.<\/p>\n

Fejltolerance:<\/h3>\n

\nHardware is not eternal, so failures happen constantly, and a colleague's hand might tremble, leading to accidental deletions. Therefore, let's discuss recovery options after disk, machine, or data center failures, as well as how to revert to a consistent state from backups in case of operator errors.<\/p>\n

Tilmeld dig<\/a><\/noindex> and tell your friends and colleagues about the event.
\n
Kilde: 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":"Working with the NoSQL storage Apache Cassandra? 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