{"id":96673,"date":"2020-10-13T19:42:22","date_gmt":"2020-10-13T17:42:22","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/novye-metriki-obektnyh-hranilishh"},"modified":"2020-10-13T19:42:22","modified_gmt":"2020-10-13T17:42:22","slug":"novye-metriki-obektnyh-hranilishh","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/novye-metriki-obektnyh-hranilishh","title":{"rendered":"Uued objekthoidlate m\u00f5\u00f5dikud","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Uued objekthoidlate m\u00f5\u00f5dikud\" src=\"\/wp-content\/uploads\/2020\/10\/eb3b7f75da1585d19429585f33f84c66.jpg\" style=\"display:block;margin: 0 auto;\" \/><noindex><a rel=\"nofollow\" href=\"https:\/\/www.deviantart.com\/nele-diel\/art\/Flying-Fortress-674023777\"><i>Lennukite kindlus Nele-Dielilt<\/i><\/a><\/noindex><\/p>\n<p>S3 objekti salvestamise meeskond <noindex><a rel=\"nofollow\" href=\"https:\/\/mcs.mail.ru\/storage\/\">Mail.ru pilvesalvestus<\/a><\/noindex> v\u00f5ttis kokku artikli, millised kriteeriumid on objekti salvestamise valimisel olulised. J\u00e4rgnevalt tekst autori vaatenurgast.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nKui jutt k\u00e4ib objekti salvestamisest, siis m\u00f5eldakse tavaliselt ainult \u00fchele omadusele \u2014 hind TB\/GB kohta. Muidugi, see n\u00e4itaja on oluline, kuid see muudab l\u00e4henemise \u00fchepoolses ja v\u00f5rdleb objekti salvestust arhiivide hoidmise t\u00f6\u00f6riistaga. Selline l\u00e4henemine v\u00e4hendab ka objekti salvestuse t\u00e4htsust ettev\u00f5tte tehnoloogilises \u00f6kos\u00fcsteemis.<\/p>\n<p>Objekti salvestuse valimisel tasub keskenduda viiele omadusele:<\/p>\n<ul>\n<li>tootlikkus;<\/li>\n<li>skaleeritavus;<\/li>\n<li>S3 \u00fchilduvus;<\/li>\n<li>rikete reageerimine;<\/li>\n<li>t\u00e4psus.<\/li>\n<\/ul>\n<p>\nNeed viis omadust on uued objekti salvestuse n\u00e4itajad, sama olulised nagu hind. Vaatame neid k\u00f5iki l\u00e4hemalt.<\/p>\n<h2>T\u00f5husus<\/h2>\n<p>\nTraditsioonilised objekti salvestused ei paista silma tootlikkuse poolest. Teenusepakkujad on pidevalt ohverdanud tootlikkuse odavate hindade nimel. Kuid kaasaegsete objektide salvestustega on k\u00f5ik teisiti.<\/p>\n<p>Erinevate salvestuste kiirus l\u00e4heneb Hadoop'ile v\u00f5i isegi \u00fcletab seda. Kaasaegsed lugemise ja kirjutamise kiirusn\u00f5uded: 10 GB\/s \u2014 k\u00f5vaketaste jaoks, kuni 35 GB\/s \u2014 NVMe jaoks.\u00a0<\/p>\n<p>Selline ribalaius on piisav Spark'i, Presto, Tensorflow, Teradata, Vertica, Splunk'i ja teiste kaasaegsete anal\u00fc\u00fctiliste \u00f5pikodade jaoks. Fakt, et MPP andmebaasid seadistatakse objekti salvestustele, n\u00e4itab, et seda kasutatakse \u00fcha enam peamise salvestusena.<\/p>\n<p>Kui teie salvestuss\u00fcsteem ei paku vajalikku kiirus, ei saa te andmeid kasutada ega neist v\u00e4\u00e4rtust v\u00e4lja v\u00f5tta. Isegi kui te ekstraheerite andmeid objekti salvestusest m\u00e4lus t\u00f6\u00f6tlemise struktuuri, on ikka vajalik ribalaius andmete edastamiseks m\u00e4llu ja sealt v\u00e4lja. Vananenud objekti salvestuste puhul on seda liiga v\u00e4he.<\/p>\n<p>See on oluline punkt: uus tootlikkuse n\u00e4itaja on ribalaius, mitte latentsus. See on vajalik skaleeritavatele andmetele ja see on norm t\u00e4nap\u00e4eva andmeinfrastruktuuris.<\/p>\n<p>Ja kuigi j\u00f5udlustestid on hea viis j\u00f5udluse m\u00e4\u00e4ramiseks, ei saa seda t\u00e4pselt m\u00f5\u00f5ta enne rakenduse k\u00e4ivitamist keskkonnas. Ainult p\u00e4rast seda saab \u00f6elda, kus kitsaskohad asuvad: tarkvaras, ketastes, v\u00f5rgu v\u00f5i arvutusv\u00f5imsuse tasemel.<\/p>\n<h2>Skaleeritavus<\/h2>\n<p>\nMastaapsust m\u00f5istetakse kui petabaiti, mis mahub \u00fchte nimesse. Teenusepakkujad r\u00e4\u00e4givad lihtsast mastaapsusest, kuid j\u00e4tavad mainimata, et mastaapimise korral muutuvad massiivsed monoliitsed s\u00fcsteemid habrasteks, keerukateks, ebastabiilseteks ja kulukateks.<\/p>\n<p>Uus mastaapsuse n\u00e4itaja on nimesid v\u00f5i kliente, keda saate teenindada. Seda m\u00f5\u00f5det v\u00f5etakse otse h\u00fcperkaalujatest, kus ladustamise ehitusplokid on v\u00e4ikesed, kuid mastaabivad miljardite \u00fcksusteni. \u00dcldiselt on see pilven\u00e4itajana.<\/p>\n<p>Kui standardblokkide m\u00f5\u00f5tmed on v\u00e4ikesed, on neid lihtsam optimeerida, st tagada turvalisus, ligip\u00e4\u00e4sukontroll, poliitikate, eluts\u00fckli ja v\u00e4rskenduste haldamine katkestusteta. Ja l\u00f5puks tagada j\u00f5udlus. Ehitusploki suurus on funktsioon rikehaldamise juhtimisest, nii ehitatakse k\u00f5rge k\u00e4ttesaadavusega s\u00fcsteeme.<\/p>\n<p>Multikliendil on palju omadusi. Kuigi parameeter r\u00e4\u00e4gib sellest, kuidas organisatsioonid annavad ligip\u00e4\u00e4su andmetele ja rakendustele, kehtib see ka rakenduste ja nende isolatsiooni loogika kohta.<\/p>\n<p><strong>Kaasaegse multikliendiga seotud l\u00e4henemise omadused:<\/strong><\/p>\n<ul>\n<li>L\u00fchikese aja jooksul v\u00f5ib klientide arv t\u00f5usta sadadest miljoniteni.<\/li>\n<li>Kliendid on omavahel t\u00e4ielikult eraldatud. See v\u00f5imaldab neil k\u00e4ivitada erinevaid versioone samast tarkvarast ja hoida objekte erinevate konfiguratsioonide, \u00f5iguste, funktsioonide, turvatasemete ja teenindusastmetega. See on h\u00e4davajalik uute serverite, uuenduste ja geograafiliste piirkondade skaleerimise korral.<\/li>\n<li>Ahi on elastne mastaapimisega, ressursid pakutakse n\u00f5udmisel.<\/li>\n<li>Iga operatsiooni haldab API ja automatiseeritakse inimeste sekkumiseta.<\/li>\n<li>Tarkvara saab paigutada konteineritesse ja kasutada standartseid orkestreerimisse s\u00fcsteeme, nagu Kubernetes.<\/li>\n<\/ul>\n<p><\/p>\n<h2>\u00dchildub S3-ga<\/h2>\n<p>\nAmazon S3 API \u2014 de facto standard objektide salvestamiseks. Iga tarkvaratootja, kes pakub objektide salvestust, v\u00e4idab, et on sellega \u00fchilduv. \u00dchilduvus S3-s on binaarne: kas see on t\u00e4ielikult rakendatud v\u00f5i ei ole seda \u00fcldse.<\/p>\n<p>Praktiliselt v\u00f5ib esineda sadu ja tuhandeid \u00e4\u00e4rmuslikke stsenaariume, kus objektide salvestamise kasutamisel midagi l\u00e4heb valesti. Eriti nagu see on juhtumiproprieetaarsete tarkvara ja teenuste pakkujatega. Selle p\u00f5hieesm\u00e4rgid on otse arhiivimine v\u00f5i varundamine, seega API-kutsed on harvad, kasutusv\u00f5imalused on \u00fchtsed.<\/p>\n<p>Olulised eelised avatud l\u00e4htekoodiga tarkvaral. See katab enamiku \u00e4\u00e4rmuslikest stsenaariumitest, arvestades rakenduste, operatsioonis\u00fcsteemide ja riistvara arhitektuuri suurust ja mitmekesisust.<\/p>\n<p>K\u00f5ik see on arendajatele oluline, seega tasub testida rakenduse toimimist salvestusteenuse pakkujatega. Avatud l\u00e4htekood lihtsustab seda protsessi \u2014 on lihtsam m\u00f5ista, milline platvorm sobib teie rakendusele. Pakkujat saab kasutada \u00fchtse sissep\u00e4\u00e4supunktina salvestustesse \u2014 see t\u00e4hendab, et see rahuldab teie vajadusi.\u00a0<\/p>\n<p>Avatud l\u00e4htekood t\u00e4hendab: rakendused ei ole seotud pakkujaga ja on l\u00e4bipaistvamad. See tagab rakenduse pika eluts\u00fckli.<\/p>\n<p>Ja veel paar m\u00e4rkust avatud l\u00e4htekoodist ja S3-st.\u00a0<\/p>\n<p>Kui k\u00e4ivitate rakenduse, mis t\u00f6\u00f6tleb suurt andmehulka, t\u00f5stab S3 SELECT m\u00e4rkimisv\u00e4\u00e4rselt j\u00f5udlust ja efektiivsust. See saavutatakse, kasutades SQL-i, et v\u00e4ljav\u00f5tteid salvestusest ainult neid objekte, mis on teile vajalikud.<\/p>\n<p>K\u00fcsimus on teenusepakkujate toetuses hoiatuste kohta. Hoidla hoiatuste tugi lihtsustab serverivaba arvutust \u2014 oluliseks komponendiks mis tahes teenusena pakutavas mikroteenuste arhitektuuris. Arvestades, et objektide salvestus on sisuliselt pilvesalvestus, muutub see funktsioon otsustavaks, kui objektide salvestust kasutatakse pilve rakendustes.<\/p>\n<p>L\u00f5ppkokkuv\u00f5ttes peab S3 rakendus toetama Amazon S3 API serveripoolsete \u0161ifreerimise meetodeid: SSE-C, SSE-S3, SSE-KMS. Veel parem, kui S3 toetab t\u00f5eliselt turvalist volitamiskaitset.\u00a0<\/p>\n<h2>Reaktsioon t\u00f5rgetele<\/h2>\n<p>\nIndikaator, mida t\u00f5en\u00e4oliselt sageli t\u00e4helepanuta j\u00e4etakse, on see, kuidas s\u00fcsteem tegeleb t\u00f5rgetega. T\u00f5rkeid esineb erinevatel p\u00f5hjustel ning objektne salvestus peab nendega k\u00f5ikide juhtumite korral toime tulema.<\/p>\n<p>N\u00e4iteks on olemas \u00fcksik t\u00f5rgetepunkt, mille m\u00f5\u00f5dik on null.<\/p>\n<p>Kahjuks kasutavad paljud objektide salvestuss\u00fcsteemid spetsiaalseid s\u00f5lmi, mis peavad olema aktiveeritud klastrite \u00f5ige t\u00f6\u00f6 tagamiseks. Need h\u00f5lmavad nimis\u00f5lmi v\u00f5i metaandmete servereid \u2013 see loob ainulaadse t\u00f5rgetepunkti.<\/p>\n<p>Isegi seal, kus on ette n\u00e4htud mitu t\u00f5rgetepunkti, on esmat\u00e4htis v\u00f5ime taluda katastroofilisi t\u00f5rkeid. K\u00f5vakettad eba\u00f5nnestuvad, serverid eba\u00f5nnestuvad. Peamine on luua tarkvara, mis on loodud t\u00f5rgete t\u00f6\u00f6tlemiseks normaalse seisundina. Kui k\u00f5vaketas v\u00f5i s\u00f5lm eba\u00f5nnestub, t\u00f6\u00f6tab see tarkvara edasi ilma muutusteta.<\/p>\n<p>Sisseehitatud kaitse kustutamise ja andmete degradatsiooni eest tagab, et: saate kaotada nii palju k\u00f5vakettaid v\u00f5i s\u00f5lmi, kui teil on pariteediblokke \u2013 tavaliselt on see pool k\u00f5vaketaste arvust. Ainult siis ei suuda tarkvara andmeid taastada.<\/p>\n<p>T\u00f5rkealased testid ei ole sageli koormuse all, kuid sellised testid on kohustuslikud. Koormuse all t\u00f5rke simuleerimine n\u00e4itab kooskulutusi, mis tekivad p\u00e4rast t\u00f5rget.<\/p>\n<h2>Konsistentsus<\/h2>\n<p>\n100% konsistentsuse n\u00e4itajat nimetatakse ka rangeks konsistentsuseks. Konsistentsus on iga salvestuss\u00fcsteemi v\u00f5tmekomponent, kuid range konsistentsus esineb \u00fcsna harva. N\u00e4iteks Amazon S3 ListObject ei ole range konsistentsusega, see on konsistentne ainult l\u00f5puks.<\/p>\n<p>Mida t\u00e4hendab range konsistentsus? K\u00f5ikide PUT-kinnitusej\u00e4rgsete toimingute puhul peab olema j\u00e4rgnev:<\/p>\n<ul>\n<li>Uuendatud v\u00e4\u00e4rtus on n\u00e4htav igast s\u00f5lmest lugemisel.<\/li>\n<li>Uuendamine on kaitstud s\u00f5lme t\u00f5rke varundamise eest.<\/li>\n<\/ul>\n<p>\nSee t\u00e4hendab: kui t\u00f5mmata pistik v\u00e4lja salvestamise keskel, siis ei kao midagi. S\u00fcsteem ei tagasta kunagi kahjustatud v\u00f5i aegunud andmeid. See on k\u00f5rge m\u00f5\u00f5t, mis on oluline paljudes stsenaariumides: alates tehingu rakendustest kuni varundamise ja taastamiseni.<\/p>\n<h2>Kokkuv\u00f5te<\/h2>\n<p>\nNeed uued objektiteenuse metrikad, mis peegeldavad kasutusmudeleid t\u00e4nap\u00e4evastes organisatsioonides, kus j\u00f5udlus, j\u00e4rjepidevus, skaleeritavus, t\u00f5rke domeenid ja S3 \u00fchilduvus on pilve rakenduste ja suurandmete anal\u00fc\u00fcsi ehitusplokid. Soovitan seda loeteluga koos hinna kasutamist ka t\u00e4nap\u00e4evaste andmestikke loomisel.\u00a0<\/p>\n<p>Mail.ru Cloud Solutions objektiteenuse kohta: <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mailru\/blog\/513356\/\">S3 arhitektuur. 3 aastat Mail.ru Cloud Storagei arengut<\/a><\/noindex>.<\/p>\n<p><strong>Mida veel lugeda:<\/strong><\/p>\n<ol>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mailru\/blog\/510110\/\">N\u00e4ide s\u00fcndmustest juhitud rakendusest, mis p\u00f5hineb veebihookidel Mail.ru Cloud Solutions objektiteenuses S3<\/a><\/noindex>.<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mailru\/blog\/472694\/\">Rohkem kui Ceph: MCS pilveplokkide salvestus\u00a0<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mailru\/blog\/507470\/\">T\u00f6\u00f6tamine Mail.ru Cloud Solutions objektiteenusega S3 kui failis\u00fcsteemiga<\/a><\/noindex>.<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/t.me\/mcsnews\">Meie Telegrami kanal uuenduste kohta S3 salvestuses ja teistes toodetes<\/a><\/noindex>.\u00a0<\/li>\n<\/ol>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mailru\/blog\/517210\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>Flying Fortress by Nele-Diel \u041a\u043e\u043c\u0430\u043d\u0434\u0430 \u043e\u0431\u044a\u0435\u043a\u0442\u043d\u043e\u0433\u043e S3-\u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 Mail.ru Cloud Storage \u043f\u0435\u0440\u0435\u0432\u0435\u043b\u0430 \u0441\u0442\u0430\u0442\u044c\u044e \u043e \u0442\u043e\u043c, \u043a\u0430\u043a\u0438\u0435 \u043a\u0440\u0438\u0442\u0435\u0440\u0438\u0438 \u0432\u0430\u0436\u043d\u044b \u043f\u0440\u0438 \u0432\u044b\u0431\u043e\u0440\u0435 \u043e\u0431\u044a\u0435\u043a\u0442\u043d\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430. \u0414\u0430\u043b\u0435\u0435 \u0442\u0435\u043a\u0441\u0442 \u043e\u0442 \u043b\u0438\u0446\u0430 \u0430\u0432\u0442\u043e\u0440\u0430. \u041a\u043e\u0433\u0434\u0430 \u0437\u0430\u0445\u043e\u0434\u0438\u0442 \u0440\u0435\u0447\u044c \u043e\u0431 \u043e\u0431\u044a\u0435\u043a\u0442\u043d\u043e\u043c \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435, \u043a\u0430\u043a \u043f\u0440\u0430\u0432\u0438\u043b\u043e, \u043b\u044e\u0434\u0438 \u0434\u0443\u043c\u0430\u044e\u0442 \u0442\u043e\u043b\u044c\u043a\u043e \u043e\u0431 \u043e\u0434\u043d\u043e\u0439 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0435 \u2014 \u0446\u0435\u043d\u0435 \u0437\u0430 \u0422\u0411\/\u0413\u0411. \u041a\u043e\u043d\u0435\u0447\u043d\u043e, \u044d\u0442\u0430 \u043c\u0435\u0442\u0440\u0438\u043a\u0430 \u0432\u0430\u0436\u043d\u0430, \u043d\u043e \u043e\u043d\u0430 \u0434\u0435\u043b\u0430\u0435\u0442 \u043f\u043e\u0434\u0445\u043e\u0434 \u043e\u0434\u043d\u043e\u0431\u043e\u043a\u0438\u043c \u0438 \u043f\u0440\u0438\u0440\u0430\u0432\u043d\u0438\u0432\u0430\u0435\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":96674,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-96673","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/novye-metriki-obektnyh-hranilishh\" \/>\n\t<meta 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