{"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\/hu\/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

Dolgozik az Apache Cassandra NoSQL t\u00e1rol\u00f3val?<\/h2>\n

\nM\u00e1jus 23-\u00e1n az Odnoklassniki tapasztalt fejleszt\u0151ket h\u00edv meg petersburgi irod\u00e1j\u00e1ba egy meetupra<\/a><\/noindex>, amely az Apache Cassandra haszn\u00e1lat\u00e1r\u00f3l sz\u00f3l. Csak az a fontos, hogy tapasztalata legyen a Cassandraval \u00e9s hajland\u00f3 legyen megosztani azt.
\nRegisztr\u00e1ljon az esem\u00e9nyre<\/a><\/noindex>
\n<\/a><\/noindex>
\nMi az O\u041a 2010 \u00f3ta haszn\u00e1ljuk az<\/a><\/noindex> Apache Cassandr\u00e1t f\u00e9nyk\u00e9pek \u00e9rt\u00e9kel\u00e9s\u00e9nek t\u00e1rol\u00e1s\u00e1ra. Jelenleg mi vagyunk a legnagyobb Apache Cassandra felhaszn\u00e1l\u00f3k az orosz interneten \u00e9s az egyik legnagyobbak Eur\u00f3p\u00e1ban. T\u00f6bb mint sz\u00e1z k\u00fcl\u00f6nb\u00f6z\u0151 klaszter\u00fcnk van, amelyeket k\u00fcl\u00f6nb\u00f6z\u0151 term\u00e9kinform\u00e1ci\u00f3k \u2013 oszt\u00e1lyok, cseveg\u00e9sek, \u00fczenetek \u2013 \u00e9s kritikus infrastrukt\u00fara adatok kezel\u00e9s\u00e9re haszn\u00e1lnak, p\u00e9ld\u00e1ul egy nagy bin\u00e1ris t\u00e1rol\u00f3 logikai blokkjainak lemezekre t\u00f6rt\u00e9n\u0151 lek\u00e9pez\u00e9s\u00e9re \u2013 one-cold-storage<\/a><\/noindex>, a bels\u0151 felh\u0151 adatainak kezel\u00e9s\u00e9re. one-cloud<\/a><\/noindex> stb.<\/p>\n

\u00d6sszess\u00e9g\u00e9ben Odnoklassnikin<\/a><\/noindex> Cassandra kezel\u00e9s\u00e9vel petabyte-ok adat tal\u00e1lhat\u00f3 t\u00f6bb ezer node-on. Ez id\u0151 alatt \u00f3ri\u00e1si tapasztalatra tett\u00fcnk szert a Cassandra alap\u00fa megold\u00e1sok adminisztr\u00e1l\u00e1s\u00e1ban, fejleszt\u00e9s\u00e9ben \u00e9s \u00fczemeltet\u00e9s\u00e9ben, \u00e9s m\u00e9g saj\u00e1t NewSQL tranzakci\u00f3s adatb\u00e1zisunkat is kifejlesztett\u00fck.<\/a><\/noindex>.<\/p>\n

Most szeretn\u00e9nk mindezt megosztani \u00d6n\u00f6kkel \u2013 val\u00f3s munkafolyamatokon \u00e9s titkok n\u00e9lk\u00fcl; az esem\u00e9ny egy \u00e9l\u0151 vita form\u00e1j\u00e1ban zajlik, ami azt jelenti, hogy a besz\u00e9lget\u00e9s a legt\u00f6bb id\u0151t fogja ig\u00e9nybe venni. Az OK szak\u00e9rt\u0151i<\/a><\/noindex> k\u00e9szen \u00e1llnak arra, hogy megossz\u00e1k \u00f6tleteiket \u00e9s megk\u00f6zel\u00edt\u00e9seiket. Az esem\u00e9nyt vezetik Oleg Anastasyev<\/a><\/noindex> \u00e9s Alekszandr Hrisztov<\/a><\/noindex>.<\/p>\n

Milyen t\u00e9m\u00e1k lesznek?<\/h2>\n

<\/p>\n

\u00dczemeltet\u00e9s:<\/h3>\n

\nMegvizsg\u00e1ljuk a tipikus node- \u00e9s klaszterkonfigur\u00e1ci\u00f3kat k\u00fcl\u00f6nb\u00f6z\u0151 production telep\u00edt\u00e9sekben. Megbesz\u00e9lj\u00fck, hogyan lehet b\u0151v\u00edteni a klasztereket az adatmennyis\u00e9g \u00e9s a terhel\u00e9s n\u00f6veked\u00e9s\u00e9vel, \u00e9s hogyan lehet a meghib\u00e1sodott node-okat a lehet\u0151 legkisebb \u00fcgyf\u00e9lhat\u00e1ssal cser\u00e9lni. Megosztjuk a neh\u00e9zs\u00e9geinket \u00e9s rendszerezz\u00fck a n\u00e9pszer\u0171 hib\u00e1kat. Kider\u00edtj\u00fck, hogyan lehet monitorozni a klasztereket, hogy id\u0151ben tudjuk, hol \u00e9s mi m\u0171k\u00f6dik nem megfelel\u0151en. \u00c9rinteni fogjuk az \u00faj Cassandra verzi\u00f3k telep\u00edt\u00e9si probl\u00e9m\u00e1it.<\/p>\n

Teljes\u00edtm\u00e9ny:<\/h3>\n

\nMegpr\u00f3b\u00e1ljuk meg\u00e9rteni, mely mutat\u00f3kra \u00e9rdemes figyelni \u00e9s mit lehet optimaliz\u00e1lni, hogy a mutat\u00f3k jobbak legyenek. Megvizsg\u00e1ljuk, \u00e9rdemes-e retri\u00e9zni, \u00e9s ha igen, akkor hogyan. Azonos\u00edtjuk az architekt\u00far\u00e1ban \u00e9s a Cassandra megval\u00f3s\u00edt\u00e1s\u00e1ban l\u00e9v\u0151 sz\u0171k helyeket, \u00e9s megvizsg\u00e1lunk n\u00e9h\u00e1ny m\u00e9rn\u00f6ki tr\u00fckk\u00f6t, hogy elker\u00fclj\u00fck ezeket. \u00c9rintj\u00fck a gyakran felmer\u00fcl\u0151 jav\u00edt\u00e1st \u00e9s a t\u00f6m\u00f6r\u00edt\u00e9st an\u00e9lk\u00fcl, hogy cs\u00f6kkenten\u00e9nk a teljes\u00edtm\u00e9nyt.<\/p>\n

Hibat\u0171r\u00e9s:<\/h3>\n

\nA hardver nem \u00f6r\u00f6k, ez\u00e9rt a hib\u00e1k folyamatosan el\u0151fordulnak, \u00e9s a koll\u00e9g\u00e1k keze is megremeghet, ami miatt v\u00e9letlen\u00fcl t\u00f6r\u00f6lhet\u00fcnk valamit. Ez\u00e9rt besz\u00e9lj\u00fcnk a lemez-, g\u00e9p- vagy adatk\u00f6zponti le\u00e1ll\u00e1sok ut\u00e1ni helyre\u00e1ll\u00edt\u00e1sr\u00f3l, valamint a vissza\u00e1ll\u00edt\u00e1sr\u00f3l az adatok konzisztens \u00e1llapot\u00e1ba a biztons\u00e1gi m\u00e1solatokb\u00f3l oper\u00e1tori hib\u00e1k eset\u00e9n.<\/p>\n

Regisztr\u00e1lj<\/a><\/noindex> \u00e9s mes\u00e9lj\u00e9tek el az esem\u00e9nyt bar\u00e1taitoknak \u00e9s koll\u00e9g\u00e1itoknak.
\n
Forr\u00e1s: 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":"Dolgozol az Apache Cassandra NoSQL t\u00e1rol\u00f3j\u00e1val? 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