{"id":100759,"date":"2021-07-14T10:23:10","date_gmt":"2021-07-14T08:23:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupna-dokumento-orientirovannaya-subd-mongodb-5-0"},"modified":"2021-07-14T10:23:10","modified_gmt":"2021-07-14T08:23:11","slug":"dostupna-dokumento-orientirovannaya-subd-mongodb-5-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/dostupna-dokumento-orientirovannaya-subd-mongodb-5-0","title":{"rendered":"Dostupn\u00e1 dokumentov\u011b orientovan\u00e1 datab\u00e1zov\u00e1 SYST\u00c9M MongoDB 5.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byla p\u0159edstavena verze dokumentov\u011b orientovan\u00e9 datab\u00e1zov\u00e9 S\u00daDB MongoDB 5.0, kter\u00e1 se nach\u00e1z\u00ed mezi rychl\u00fdmi a \u0161k\u00e1lovateln\u00fdmi syst\u00e9my zpracov\u00e1vaj\u00edc\u00edmi data ve form\u00e1tu kl\u00ed\u010d\/hodnota a rela\u010dn\u00edmi S\u00daDB, kter\u00e9 jsou funk\u010dn\u00ed a snadno se vytv\u00e1\u0159ej\u00ed dotazy. K\u00f3d MongoDB je naps\u00e1n v jazyce C++ a je \u0161\u00ed\u0159en pod licenc\u00ed SSPL, kter\u00e1 vych\u00e1z\u00ed z licence AGPLv3, ale nen\u00ed otev\u0159en\u00e1, proto\u017ee obsahuje diskrimina\u010dn\u00ed po\u017eadavek na dod\u00e1v\u00e1n\u00ed pod licenc\u00ed SSPL nejen \u043a\u00f3du samotn\u00e9 aplikace, ale tak\u00e9 zdrojov\u00fdch k\u00f3d\u016f v\u0161ech komponent, kter\u00e9 se pod\u00edlej\u00ed na poskytov\u00e1n\u00ed cloudov\u00e9 slu\u017eby.      <\/p>\n<p>MongoDB podporuje ukl\u00e1d\u00e1n\u00ed dokument\u016f v JSON-podobn\u00e9m form\u00e1tu, m\u00e1 dostate\u010dn\u011b flexibiln\u00ed jazyk pro vytv\u00e1\u0159en\u00ed dotaz\u016f, m\u016f\u017ee vytv\u00e1\u0159et indexy pro r\u016fzn\u00e9 ulo\u017een\u00e9 atributy, efektivn\u011b zaji\u0161\u0165uje ukl\u00e1d\u00e1n\u00ed velk\u00fdch bin\u00e1rn\u00edch objekt\u016f, podporuje protokolov\u00e1n\u00ed operac\u00ed p\u0159i zm\u011bn\u011b a p\u0159id\u00e1v\u00e1n\u00ed dat do datab\u00e1ze, m\u016f\u017ee pracovat v souladu s paradigmatem Map\/Reduce, podporuje replikaci a budov\u00e1n\u00ed odoln\u00fdch konfigurac\u00ed.     <\/p>\n<p>V MongoDB jsou k dispozici vestav\u011bn\u00e9 prost\u0159edky pro zaji\u0161t\u011bn\u00ed segmentace (distribuce datov\u00e9 sady na servery na z\u00e1klad\u011b ur\u010dit\u00e9ho kl\u00ed\u010de), v kombinaci s replikac\u00ed umo\u017e\u0148uj\u00edc\u00ed vybudovat horizont\u00e1ln\u011b \u0161k\u00e1lovateln\u00fd skladovac\u00ed cluster, ve kter\u00e9m nen\u00ed jedin\u00fd bod selh\u00e1n\u00ed (selh\u00e1n\u00ed jak\u00e9hokoli uzlu nem\u00e1 vliv na funkci datab\u00e1ze), podporuje automatick\u00e9 obnoven\u00ed po selh\u00e1n\u00ed a p\u0159enos z\u00e1t\u011b\u017ee z nefunk\u010dn\u00edho uzlu. Roz\u0161\u00ed\u0159en\u00ed clusteru nebo transformace jednoho <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-los-angeles\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3732\">serveru<\/a> do clustru se prov\u00e1d\u00ed bez p\u0159eru\u0161en\u00ed pr\u00e1ce datab\u00e1ze prost\u00fdm p\u0159id\u00e1n\u00edm nov\u00fdch stroj\u016f.         <\/p>\n<p>Vlastnosti nov\u00e9ho vyd\u00e1n\u00ed:  <\/p>\n<ul>\n<li class=\"l\"> Byly p\u0159id\u00e1ny kolekce pro data ve form\u011b \u010dasov\u00fdch \u0159ad (time series collections), optimalizovan\u00e9 pro ukl\u00e1d\u00e1n\u00ed hodnotov\u00fdch parametr\u016f, zaznamen\u00e1van\u00fdch v ur\u010dit\u00fdch \u010dasov\u00fdch intervalech (\u010das a sadu odpov\u00eddaj\u00edc\u00edch hodnot k tomuto \u010dasu). Pot\u0159eba uchov\u00e1vat podobn\u00e1 data vznik\u00e1 v syst\u00e9mech monitorov\u00e1n\u00ed, finan\u010dn\u00edch platform\u00e1ch a syst\u00e9mech pro sledov\u00e1n\u00ed stavu senzor\u016f. Pr\u00e1ce s daty \u010dasov\u00fdch \u0159ad se prov\u00e1d\u00ed jako s b\u011b\u017en\u00fdmi kolekcemi dokument\u016f, ale indexy a metoda jejich ukl\u00e1d\u00e1n\u00ed jsou optimalizov\u00e1ny s ohledem na \u010dasovou vazbu, co\u017e v\u00fdrazn\u011b sni\u017euje spot\u0159ebu m\u00edsta na disku, zkracuje latenci p\u0159i vykon\u00e1v\u00e1n\u00ed dotaz\u016f a umo\u017e\u0148uje anal\u00fdzu dat v re\u00e1ln\u00e9m \u010dase.\n<p>MongoDB pova\u017euje takov\u00e9 kolekce za zapisovateln\u00e9 nematerializovan\u00e9 pohledy, vytvo\u0159en\u00e9 na z\u00e1klad\u011b intern\u00edch kolekc\u00ed, kter\u00e9 p\u0159i vkl\u00e1d\u00e1n\u00ed automaticky skupinuj\u00ed data \u010dasov\u00e9ho \u0159adu do optimalizovan\u00e9ho form\u00e1tu ukl\u00e1d\u00e1n\u00ed. P\u0159itom ka\u017ed\u00e1 \u010dasov\u011b v\u00e1zan\u00e1 z\u00e1pis se p\u0159i dotazu zpracov\u00e1v\u00e1 jako samostatn\u00fd dokument. Data jsou automaticky uspo\u0159\u00e1d\u00e1na a indexov\u00e1na podle \u010dasu (nen\u00ed t\u0159eba explicitn\u011b vytv\u00e1\u0159et indexy podle \u010dasu).        <\/p>\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora okenn\u00edch oper\u00e1tor\u016f (analytick\u00fdch funkc\u00ed), kter\u00e9 umo\u017e\u0148uj\u00ed prov\u00e1d\u011bt akce s ur\u010dit\u00fdm souborem dokument\u016f v kolekci. Na rozd\u00edl od agrega\u010dn\u00edch funkc\u00ed oknov\u00e9 funkce nesmr\u0161\u0165uj\u00ed seskupen\u00fd soubor, ale prov\u00e1d\u011bj\u00ed agregaci na z\u00e1klad\u011b obsahu \u201eokna\u201c, kter\u00e9 zahrnuje jeden nebo v\u00edce dokument\u016f z v\u00fdsledn\u00e9ho souboru. Pro manipulaci s podmno\u017einou dokument\u016f byla navr\u017eena nov\u00e1 etapa $setWindowFields, kter\u00e1 umo\u017e\u0148uje nap\u0159\u00edklad ur\u010dit rozd\u00edly mezi dv\u011bma dokumenty v kolekci, vypo\u010d\u00edtat hodnocen\u00ed prodeje a analyzovat informace ve slo\u017eit\u00fdch \u010dasov\u00fdch \u0159ad\u00e1ch.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora verzov\u00e1n\u00ed API, kter\u00e1 umo\u017e\u0148uje p\u0159ipojit aplikaci k ur\u010dit\u00e9mu stavu API a vylou\u010dit rizika spojen\u00e1 s mo\u017en\u00fdm poru\u0161en\u00edm zp\u011btn\u00e9 kompatibility p\u0159i p\u0159echodu na nov\u00e9 verze DBMS. Verzov\u00e1n\u00ed API odd\u011bluje \u017eivotn\u00ed cyklus aplikace od \u017eivotn\u00edho cyklu DBMS a umo\u017e\u0148uje v\u00fdvoj\u00e1\u0159\u016fm prov\u00e1d\u011bt zm\u011bny v aplikaci tehdy, kdy\u017e je t\u0159eba vyu\u017e\u00edt nov\u00e9 funkce, a nikoli kdy\u017e se prov\u00e1d\u00ed p\u0159echod na novou verzi DBMS.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora mechanismu Live Resharding, kter\u00fd umo\u017e\u0148uje za b\u011bhu m\u011bnit pou\u017e\u00edvan\u00e9 kl\u00ed\u010de pro segmentaci (shard key) bez zastaven\u00ed DBMS.\n<li class=\"l\"> Byly roz\u0161\u00ed\u0159eny mo\u017enosti \u0161ifrov\u00e1n\u00ed pol\u00ed na stran\u011b klienta (Client-Side Field Level Encryption). Objevila se mo\u017enost p\u0159econfigurov\u00e1n\u00ed auditn\u00edch filtr\u016f a rotace certifik\u00e1t\u016f x509 bez zastaven\u00ed provozu DBMS. Byla p\u0159id\u00e1na podpora konfigurace \u0161ifrovac\u00ed sady pro TLS 1.3.\n<li class=\"l\"> Byl navr\u017een nov\u00fd p\u0159\u00edkazov\u00fd \u0159\u00e1dek MongoDB Shell (mongosh), kter\u00fd se vyv\u00edj\u00ed jako samostatn\u00fd projekt, napsan\u00fd v JavaScriptu s vyu\u017eit\u00edm platformy Node.js a \u0161\u00ed\u0159en\u00fd pod licenc\u00ed Apache 2.0. MongoDB Shell umo\u017e\u0148uje p\u0159ipojen\u00ed k datab\u00e1zi, zm\u011bnu nastaven\u00ed a odes\u00edl\u00e1n\u00ed dotaz\u016f. Podporuje inteligentn\u00ed automatick\u00e9 dopl\u0148ov\u00e1n\u00ed vstupu metod, p\u0159\u00edkaz\u016f a v\u00fdraz\u016f MQL, zv\u00fdrazn\u011bn\u00ed syntaxe, kontextovou n\u00e1pov\u011bdu, anal\u00fdzu chybov\u00fdch zpr\u00e1v a mo\u017enost roz\u0161\u00ed\u0159en\u00ed funkcionality prost\u0159ednictv\u00edm dopl\u0148k\u016f. Star\u00fd CLI-shell \u201emongo\u201c byl ozna\u010den jako zastaral\u00fd a bude odstran\u011bn v budouc\u00ed verzi.      <center><img decoding=\"async\" alt=\"Dostupn\u00e1 dokumentov\u011b orientovan\u00e1 datab\u00e1zov\u00e1 SYST\u00c9M MongoDB 5.0 \" src=\"\/wp-content\/uploads\/2021\/07\/18b2004d16ec7cb4632f7b9b804a24eb.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>\n<li class=\"l\"> Byly p\u0159id\u00e1ny nov\u00e9 oper\u00e1tory: $count, $dateAdd, $dateDiff, $dateSubtract, $sampleRate a $rand.\n<li class=\"l\"> Zaji\u0161t\u011bno vyu\u017eit\u00ed index\u016f p\u0159i pou\u017eit\u00ed oper\u00e1tor\u016f $eq, $lt, $lte, $gt a $gte uvnit\u0159 v\u00fdrazu $expr.\n<li class=\"l\"> V p\u0159\u00edkazech aggregate, find, findAndModify, update, delete a metod\u00e1ch db.collection.aggregate(), db.collection.findAndModify(), db.collection.update() a db.collection.remove() byla implementov\u00e1na podpora mo\u017enosti \u201elet\u201c pro definov\u00e1n\u00ed seznamu prom\u011bnn\u00fdch, co\u017e \u010din\u00ed p\u0159\u00edkazy p\u0159ehledn\u011bj\u0161\u00edmi d\u00edky odd\u011blen\u00ed prom\u011bnn\u00fdch od textu dotazu.\n<li class=\"l\"> Operace find, count, distinct, aggregate, mapReduce, listCollections a listIndexes ji\u017e nejsou blokov\u00e1ny, pokud je sou\u010dasn\u011b prov\u00e1d\u011bna operace, kter\u00e1 vytv\u00e1\u0159\u00ed exkluzivn\u00ed z\u00e1mek na kolekci dokument\u016f.\n<li class=\"l\"> V r\u00e1mci iniciativy k odstran\u011bn\u00ed nep\u0159esn\u00fdch term\u00edn\u016f byla \u043a\u043e\u043c\u0430\u043d\u0434\u0430 isMaster a metoda db.isMaster() p\u0159ejmenov\u00e1na na hello a db.hello().\n<li class=\"l\"> Byla zm\u011bn\u011bna sch\u00e9ma \u010d\u00edslov\u00e1n\u00ed verz\u00ed a byl zaveden p\u0159edv\u00eddateln\u00fd rozvrh vyd\u00e1v\u00e1n\u00ed. Jednou ro\u010dn\u011b bude vyd\u00e1na v\u00fdznamn\u00e1 verze (5.0, 6.0, 7.0), ka\u017ed\u00e9 t\u0159i m\u011bs\u00edce pak meziverze s nov\u00fdmi funkcemi (5.1, 5.2, 5.3) a podle pot\u0159eby opravn\u00e9 aktualizace s opravou chyb a zranitelnost\u00ed (5.1.1, 5.1.2, 5.1.3). V meziverz\u00edch bude vyv\u00edjena funk\u010dnost pro n\u00e1sleduj\u00edc\u00ed v\u00fdznamnou verzi, tj. v MongoDB 5.1, 5.2 a 5.3 budou vytvo\u0159eny nov\u00e9 funkce pro vyd\u00e1n\u00ed MongoDB 6.0.          <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55481\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u043e-\u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0421\u0423\u0411\u0414 MongoDB 5.0, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0437\u0430\u043d\u0438\u043c\u0430\u0435\u0442 \u043d\u0438\u0448\u0443 \u043c\u0435\u0436\u0434\u0443 \u0431\u044b\u0441\u0442\u0440\u044b\u043c\u0438 \u0438 \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u0443\u0435\u043c\u044b\u043c\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u043c\u0438, \u043e\u043f\u0435\u0440\u0438\u0440\u0443\u044e\u0449\u0438\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 \u043a\u043b\u044e\u0447\/\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435, \u0438 \u0440\u0435\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u044b\u043c\u0438 \u0421\u0423\u0411\u0414, \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u043c\u0438 \u0438 \u0443\u0434\u043e\u0431\u043d\u044b\u043c\u0438 \u0432 \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432. \u041a\u043e\u0434 MongoDB \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 C++ \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 SSPL, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0438 AGPLv3, \u043d\u043e \u043d\u0435 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439, \u0442\u0430\u043a \u043a\u0430\u043a \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u0442 \u0434\u0438\u0441\u043a\u0440\u0438\u043c\u0438\u043d\u0438\u0440\u0443\u044e\u0449\u0435\u0435 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0441\u0442\u0430\u0432\u043a\u0438 \u043f\u043e\u0434 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