{"id":34891,"date":"2019-10-31T22:01:07","date_gmt":"2019-10-31T19:01:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/dostupna-sistema-raspredelyonnyh-vychislenij-apache-storm-2-0\/"},"modified":"2019-10-31T22:01:07","modified_gmt":"2019-10-31T19:01:07","slug":"dostupna-sistema-raspredelyonnyh-vychislenij-apache-storm-2-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/dostupna-sistema-raspredelyonnyh-vychislenij-apache-storm-2-0","title":{"rendered":"Dostupn\u00fd syst\u00e9m distribuovan\u00fdch v\u00fdpo\u010dt\u016f Apache Storm 2.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"http:\/\/storm.apache.org\/2019\/05\/30\/storm200-released.html\">Uvid\u011bl sv\u011btlo sv\u011bta<\/a><\/noindex> v\u00fdznamn\u00e9 vyd\u00e1n\u00ed syst\u00e9mu pro distribuovan\u00e9 zpracov\u00e1n\u00ed ud\u00e1lost\u00ed <noindex><a rel=\"nofollow\" href=\"http:\/\/storm.apache.org\/\">Apache Storm 2.0<\/a><\/noindex>, charakterizovan\u00e9 p\u0159echodem na novou architekturu implementovanou v jazyce Java, m\u00edsto d\u0159\u00edve pou\u017e\u00edvan\u00e9ho jazyka Clojure. <\/p>\n<p>Projekt umo\u017e\u0148uje organizovat zaru\u010den\u00e9 zpracov\u00e1n\u00ed r\u016fzn\u00fdch ud\u00e1lost\u00ed v re\u00e1ln\u00e9m \u010dase. Nap\u0159\u00edklad, Storm lze pou\u017e\u00edt pro anal\u00fdzu datov\u00fdch tok\u016f v re\u00e1ln\u00e9m \u010dase, prov\u00e1d\u011bn\u00ed \u00faloh pro strojov\u00e9 u\u010den\u00ed, organizaci nep\u0159etr\u017eit\u00fdch v\u00fdpo\u010dt\u016f, realizaci RPC, ETL atd. Syst\u00e9m podporuje clustering, vytv\u00e1\u0159en\u00ed redundantn\u00edch konfigurac\u00ed, re\u017eim zaru\u010den\u00e9ho zpracov\u00e1n\u00ed dat a vykazuje vysok\u00fd v\u00fdkon, dostate\u010dn\u00fd pro zpracov\u00e1n\u00ed v\u00edce ne\u017e milionu po\u017eadavk\u016f za sekundu na jednom uzlu clusteru. <\/p>\n<p>Podporuje integraci s r\u016fzn\u00fdmi syst\u00e9my zpracov\u00e1n\u00ed front a datab\u00e1zov\u00fdmi technologiemi. Architektura Storm p\u0159edpokl\u00e1d\u00e1 p\u0159\u00edjem a zpracov\u00e1n\u00ed nestrukturovan\u00fdch neust\u00e1le aktualizovan\u00fdch datov\u00fdch tok\u016f za pou\u017eit\u00ed libovoln\u00fdch slo\u017eit\u00fdch zpracovatel\u016f s mo\u017enost\u00ed sekvenov\u00e1n\u00ed mezi r\u016fzn\u00fdmi f\u00e1zemi v\u00fdpo\u010dt\u016f. Projekt byl p\u0159ed\u00e1n komunit\u011b Apache po akvizici spole\u010dnosti BackType Twitterem, kter\u00e1 p\u016fvodn\u011b framework vyvinula. V praxi byl Storm pou\u017eit ve spole\u010dnosti BackType pro anal\u00fdzu ud\u00e1lost\u00ed v mikrobloguech, t\u00edm, \u017ee porovn\u00e1val v re\u00e1ln\u00e9m \u010dase nov\u00e9 tweety a v nich pou\u017eit\u00e9 odkazy (nap\u0159\u00edklad byla prov\u00e1d\u011bna hodnocen\u00ed, jak extern\u00ed odkazy nebo zve\u0159ej\u0148ovan\u00e9 ozn\u00e1men\u00ed na Twitteru jsou retweetov\u00e1ny jin\u00fdmi u\u017eivateli). <\/p>\n<p>Funk\u010dnost Storm se srovn\u00e1v\u00e1 s platformou Hadoop, p\u0159i\u010dem\u017e kl\u00ed\u010dov\u00fdm rozd\u00edlem je to, \u017ee data nejsou ulo\u017eena ve skladu, ale p\u0159ich\u00e1zej\u00ed zven\u010d\u00ed a zpracov\u00e1vaj\u00ed se v re\u00e1ln\u00e9m \u010dase. V Storm neexistuje vestav\u011bn\u00e1 vrstva pro organizaci \u00falo\u017ei\u0161t\u011b a analytick\u00fd dotaz se za\u010d\u00edn\u00e1 aplikovat na p\u0159ich\u00e1zej\u00edc\u00ed data, dokud nen\u00ed zru\u0161en (pokud v Hadoopu pou\u017e\u00edvaj\u00ed \u010dasov\u011b n\u00e1ro\u010dn\u00e9 MapReduce \u00falohy, v Storm se uplat\u0148uje my\u0161lenka neust\u00e1le prov\u00e1d\u011bn\u00fdch \u201etopologi\u00ed\u201c). Spu\u0161t\u011bn\u00ed zpracovatel\u016f m\u016f\u017ee b\u00fdt distribuov\u00e1no na n\u011bkolik server\u016f - Storm automaticky paralelizuje pr\u00e1ci s toky na r\u016fzn\u00e9 uzly clustera. <\/p>\n<p>P\u016fvodn\u011b byla syst\u00e9m naps\u00e1n v jazyce Clojure a b\u011b\u017e\u00ed uvnit\u0159 virtu\u00e1ln\u00ed stroje JVM. V r\u00e1mci projektu Apache byla spu\u0161t\u011bna iniciativa na p\u0159evod Storm na nov\u00e9 j\u00e1dro, napsan\u00e9 v Jav\u011b, jej\u00ed\u017e v\u00fdsledky byly uvedeny ve vyd\u00e1n\u00ed Apache Storm 2.0. V\u0161echny z\u00e1kladn\u00ed komponenty platformy byly p\u0159eps\u00e1ny v Jav\u011b. Podpora psan\u00ed zpracovatel\u016f v Clojure byla zachov\u00e1na, ale nyn\u00ed je nab\u00edzena ve form\u011b binding\u016f. Pro provoz Storm 2.0.0 je vy\u017eadov\u00e1na Java 8. Model zpracov\u00e1n\u00ed s v\u00edce vl\u00e1kny byl kompletn\u011b p\u0159epracov\u00e1n, co\u017e umo\u017enilo <noindex><a rel=\"nofollow\" href=\"https:\/\/yahoodevelopers.tumblr.com\/post\/185258393008\/apache-storm-20-improvements\">a tak\u00e9 pomoc\u00ed atributu packed. Vzhledem k tomu, \u017ee nav\u00edc p\u0159isp\u00edv\u00e1 k optimalizaci m\u00edsta zabran\u00e9ho strukturou, pova\u017euji tuto metodu za v\u00fdhodn\u011bj\u0161\u00ed, a\u010dkoli<\/a><\/noindex> v\u00fdrazn\u00e9 zv\u00fd\u0161en\u00ed v\u00fdkonu (u n\u011bkter\u00fdch topologi\u00ed se zpo\u017ed\u011bn\u00ed zkr\u00e1tila o 50-80%).<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/69.media.tumblr.com\/3f630f757d60a09d5f50c78938262b61\/tumblr_inline_pscc4bXpK91wxhpzr_500.png\"><img decoding=\"async\" alt=\"Dostupn\u00fd syst\u00e9m distribuovan\u00fdch v\u00fdpo\u010dt\u016f Apache Storm 2.0\" src=\"\/wp-content\/uploads\/2019\/06\/b59ad4ac2234ca882718d30679f2e85e.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>V nov\u00e9 verzi je rovn\u011b\u017e uveden nov\u00fd typovan\u00fd API Streams, kter\u00fd umo\u017e\u0148uje definovat zpracovatele pomoc\u00ed operac\u00ed ve stylu funk\u010dn\u00edho programov\u00e1n\u00ed. Nov\u00fd API je realizov\u00e1n na vrcholu standardn\u00edho z\u00e1kladn\u00edho API a podporuje automatick\u00e9 slu\u010dov\u00e1n\u00ed operac\u00ed pro optimalizaci jejich zpracov\u00e1n\u00ed. V API Windowing pro okenn\u00ed operace byla p\u0159id\u00e1na podpora pro ukl\u00e1d\u00e1n\u00ed a obnovu stavu na backendu. <\/p>\n<p>Do pl\u00e1nova\u010de spu\u0161t\u011bn\u00ed zpracovatel\u016f byla p\u0159id\u00e1na podpora zohled\u0148ov\u00e1n\u00ed dal\u0161\u00edch zdroj\u016f p\u0159i rozhodov\u00e1n\u00ed, kter\u00e9 se neomezuj\u00ed<br \/>\n na CPU a pam\u011b\u0165, jako jsou s\u00ed\u0165ov\u00e9 parametry a GPU. Bylo provedeno mnoho vylep\u0161en\u00ed t\u00fdkaj\u00edc\u00edch se zaji\u0161t\u011bn\u00ed integrace s platformou <noindex><a rel=\"nofollow\" href=\"http:\/\/kafka.apache.org\/\">Kafka<\/a><\/noindex>. Byla roz\u0161\u00ed\u0159ena syst\u00e9m \u0159\u00edzen\u00ed p\u0159\u00edstupu, kter\u00fd nyn\u00ed umo\u017e\u0148uje vytv\u00e1\u0159en\u00ed skupin administr\u00e1tor\u016f a delegaci token\u016f. Byla p\u0159id\u00e1na vylep\u0161en\u00ed t\u00fdkaj\u00edc\u00ed se podpory SQL a metrik. V administr\u00e1torsk\u00e9m rozhran\u00ed se objevily nov\u00e9 p\u0159\u00edkazy pro lad\u011bn\u00ed stavu clusteru.<\/p>\n<p>Oblasti pou\u017eit\u00ed Storm:\n<\/p>\n<ul>\n<li class=\"l\"> Zpracov\u00e1n\u00ed stream\u016f nov\u00fdch dat nebo aktualizac\u00ed datab\u00e1ze v re\u00e1ln\u00e9m \u010dase;\n<\/li>\n<li class=\"l\"> Nep\u0159etr\u017eit\u00e9 v\u00fdpo\u010dty: Storm m\u016f\u017ee prov\u00e1d\u011bt nep\u0159etr\u017eit\u00e9 dotazy a zpracov\u00e1vat nep\u0159etr\u017eit\u00e9 toky, pos\u00edlaj\u00edce v\u00fdsledky zpracov\u00e1n\u00ed klientovi v re\u00e1ln\u00e9m \u010dase.\n<\/li>\n<li class=\"l\"> Distribuovan\u00e9 vzd\u00e1len\u00e9 vol\u00e1n\u00ed procedur (RPC): Storm m\u016f\u017ee b\u00fdt pou\u017eit k zaji\u0161t\u011bn\u00ed paralelismu vykon\u00e1v\u00e1n\u00ed v\u00fdpo\u010detn\u011b n\u00e1ro\u010dn\u00fdch dotaz\u016f. \u00dakol (\u201etopologie\u201c) v Storm p\u0159edstavuje distribuovanou funkci na uzlech, kter\u00e1 \u010dek\u00e1 na p\u0159\u00edjem zpr\u00e1v, kter\u00e9 je t\u0159eba zpracovat. Po p\u0159ijet\u00ed zpr\u00e1vy funkce zpracov\u00e1v\u00e1 tuto zpr\u00e1vu v lok\u00e1ln\u00edm kontextu a vrac\u00ed v\u00fdsledek. P\u0159\u00edkladem pou\u017eit\u00ed distribuovan\u00e9ho RPC m\u016f\u017ee b\u00fdt paraleln\u00ed zpracov\u00e1n\u00ed vyhled\u00e1vac\u00edch dotaz\u016f nebo prov\u00e1d\u011bn\u00ed operac\u00ed nad velk\u00fdm mno\u017estv\u00edm mno\u017ein.\n<\/li>\n<\/ul>\n<p>Vlastnosti Stormu:<\/p>\n<ul>\n<li class=\"l\"> Jednoduch\u00fd model programov\u00e1n\u00ed, kter\u00fd v\u00fdrazn\u011b usnad\u0148uje zpracov\u00e1n\u00ed dat v re\u00e1ln\u00e9m \u010dase;\n<\/li>\n<li class=\"l\"> Podpora jak\u00fdchkoliv programovac\u00edch jazyk\u016f. Existuj\u00ed moduly pro Java, Ruby a Python, p\u0159izp\u016fsoben\u00ed pro jin\u00e9 jazyky nep\u0159edstavuje probl\u00e9m d\u00edky velmi jednoduch\u00e9mu komunika\u010dn\u00edmu protokolu, jeho\u017e zaveden\u00ed vy\u017eaduje p\u0159ibli\u017en\u011b 100 \u0159\u00e1dk\u016f k\u00f3du;\n<\/li>\n<li class=\"l\"> Odolnost proti chyb\u00e1m: pro spu\u0161t\u011bn\u00ed \u00fakolu zpracov\u00e1n\u00ed dat je t\u0159eba vytvo\u0159it jar soubor s k\u00f3dem. Storm automaticky roz\u0161\u00ed\u0159\u00ed tento jar soubor po uzlech clustru, p\u0159ipoj\u00ed souvisej\u00edc\u00ed zpracovatele a zorganizuje monitoring. Po dokon\u010den\u00ed \u00fakolu se k\u00f3d automaticky na v\u0161ech uzlech vypne;\n<\/li>\n<li class=\"l\"> Horizont\u00e1ln\u00ed \u0161k\u00e1lovatelnost. V\u0161echny v\u00fdpo\u010dty prob\u00edhaj\u00ed paraleln\u011b, p\u0159i zvy\u0161ov\u00e1n\u00ed z\u00e1t\u011b\u017ee sta\u010d\u00ed k clustru jednodu\u0161e p\u0159ipojit nov\u00e9 uzly;\n<\/li>\n<li class=\"l\"> Spolehlivost. Storm zaru\u010duje, \u017ee ka\u017ed\u00e1 p\u0159ijat\u00e1 zpr\u00e1va bude zpracov\u00e1na alespo\u0148 jednou. Zpr\u00e1va bude zpracov\u00e1na pouze jednou, pokud nenastanou chyby b\u011bhem zpracov\u00e1n\u00ed v\u0161emi zpracovateli; v p\u0159\u00edpad\u011b probl\u00e9m\u016f budou ne\u00fasp\u011b\u0161n\u00e9 pokusy o zpracov\u00e1n\u00ed opakov\u00e1ny.\n<\/li>\n<li class=\"l\"> Rychlost. K\u00f3d Stormu je naps\u00e1n s ohledem na vysok\u00fd v\u00fdkon a vyu\u017e\u00edv\u00e1 rychl\u00fd asynchronn\u00ed syst\u00e9m pro v\u00fdm\u011bnu zpr\u00e1v. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=27137\">ZeroMQ<\/a><\/noindex>.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50796\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0423\u0432\u0438\u0434\u0435\u043b \u0441\u0432\u0435\u0442 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0441\u043e\u0431\u044b\u0442\u0438\u0439 Apache Storm 2.0, \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u043e\u043c \u043d\u0430 \u043d\u043e\u0432\u0443\u044e \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0443, \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u0443\u044e \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Java, \u0432\u043c\u0435\u0441\u0442\u043e \u0440\u0430\u043d\u0435\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u044f\u0437\u044b\u043a\u0430 Clojure. \u041f\u0440\u043e\u0435\u043a\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u0443\u044e \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u0441\u043e\u0431\u044b\u0442\u0438\u0439 \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 \u0440\u0435\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, Storm \u043c\u043e\u0436\u043d\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c \u0434\u043b\u044f \u0430\u043d\u0430\u043b\u0438\u0437\u0430 \u043f\u043e\u0442\u043e\u043a\u043e\u0432 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 \u0440\u0435\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438, \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u0447 \u0434\u043b\u044f \u043c\u0430\u0448\u0438\u043d\u043d\u043e\u0433\u043e \u043e\u0431\u0443\u0447\u0435\u043d\u0438\u044f, \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u043d\u0435\u043f\u0440\u0435\u0440\u044b\u0432\u043d\u044b\u0445 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